Drag the type of toxicant on the left to the example of that type on the right. Terms may be used once, more than once, or not at all.
1. teratogen or endocrine disruptor
2.neurotoxin
3.carcinogen
4.allergen
5.neurotoxin
6.carcinogen
7.teratogen or endocrine disruptor

Answer:

In electron micrograph images of mitosis, structures are typically not stained fluorescent blue, as electron microscopy uses electrons rather than light, and does not involve the use of fluorescent dyes.

However, if we consider fluorescence microscopy images of mitosis, which use fluorescent dyes to visualize specific cellular structures, the structures that are stained fluorescent blue will depend on the specific dyes used.

In general, dyes that stain DNA, such as DAPI (4',6-diamidino-2-phenylindole), Hoechst, or SYTOX, will stain the chromatin in the nucleus of the cell blue. During mitosis, the chromatin condenses into distinct chromosomes, which can be visualized as blue structures in fluorescence microscopy images.

It's important to note that the specific structures stained fluorescent blue may vary depending on the experimental setup and the specific dyes used.

An inappropriately managed injury to the periosteum may develop into further damage, bone callus, delayed healing, or even chronic pain.

The periosteum is a thin layer of connective tissue that covers the bones and plays a crucial role in bone healing and repair. If an injury to the periosteum is not properly diagnosed and treated, it can lead to complications and hinder the body's natural healing process. It is important to seek medical attention for any injury, especially those involving the periosteum, to ensure appropriate management and prevent further damage.

Injury to the periosteum can occur due to trauma, such as a fracture or dislocation, or due to a chronic condition such as osteomyelitis. If the injury is not appropriately managed, it can lead to the formation of a bone callus, which is a mass of bony tissue that forms at the site of the injury as part of the healing process.

While a bone callus is a normal part of the bone healing process, an inappropriately managed injury can result in the formation of a larger or irregular callus, which can cause pain, stiffness, and a limited range of motion. In severe cases, the callus may need to be surgically removed to restore proper function and movement.

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The correct statement is  most plants maintain a mycorrhizal relationship.

The correct option is B.

In general , majority of plants maintain a mycorrhizal relationship. However, there are some plants that do not form mycorrhizae, such as members of the Brassicaceae family (mostly having mustard and cabbage), as well as some orchid species that have evolved alternative strategies for nutrient acquisition.

Also, Mycorrhizae are symbiotic associations between plant roots and fungi, where the fungus provides the plant with nutrients  and the plant provides the fungus with carbohydrates.

Hence , B is the correct option

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The mutated gene encoding map kkk is best described as an oncogene.

A mutant gene that has the potential to cause cancer is known as an oncogene. Proto-oncogenes, which are oncogenes before they undergo mutations, control healthy cell division.

Mutations that boost a proto-oncogene's expression level or activity give rise to oncogenes. The following are underlying genetic pathways linked to oncogene activation: point mutations, deletions, or insertions that result in a gene product with a high level of activity.

They also control the cell cycle and apoptosis, as well as cell development, differentiation, and proliferation. Growth factors, growth factor receptors, signal transducers, transcription factors, apoptotic regulators, and chromatin remodelers are some of the byproducts of oncogenes.

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Biodiversity of an ecosystem provides the foundation for human well-being by providing the essential resources we need for survival and prosperity. Biodiversity provides the essential building blocks of our food, medicine, and industrial products.

In general , biodiversity is also essential for providing the raw materials for medicine. Many of the drugs used to treat diseases are derived from natural products found in plants, fungi, and bacteria. Industrial products are another example of how humans rely on the biodiversity of an ecosystem. Many materials used in manufacturing, such as wood, fibers, and oils, are obtained from plants and animals.

Also, lack of biodiversity can lead to overexploitation of natural resources, such as timber, and may result in the extinction of species. In addition, the loss of biodiversity can reduce the genetic diversity of domesticated species, such as livestock, which can lead to reduced resistance.

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Options 1, 3, 4, and 5 are correct. Option 2 is not correct because the signal slows down in the AV node due to the presence of more gap junctions, which allows for a slower conduction and proper coordination of atrial and ventricular contractions.

The correct statements that accurately explain impulse conduction to the myocardium are:

- Firing of the SA node excites atrial cardiomyocytes and stimulates the two atria to contract almost simultaneously.
- The delay at the AV node is essential because it gives the atria time to fill with blood before they begin to contract.
- The entire ventricular myocardium depolarizes within 200 msec after the SA node fires, causing the ventricles to contract one after another.
- Signals travel through the AV bundle and Purkinje fibers at a speed of 4 msec, the fastest in the conduction system.

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The firing of the SA node excites atrial cardiomyocytes and stimulates the two atria to contract almost simultaneously.

Conduction through the heart muscles:

The entire ventricular myocardium depolarizes within 200 msec after the SA node fires, causing the ventricles to contact one after another, Signals travel through the AV bundle and Purkinje fibers at a speed of 4 msec, the fastest in the conduction system, The delay at the AV node is essential because it gives the atria time to fill with blood before they begin to contract.
The process of impulse conduction:
1. Firing of the SA node excites atrial cardiomyocytes and stimulates the two atria to contract almost simultaneously.
2. In the AV node, the signal slows down to about 0.05 m/sec because the cardiomyocytes have fewer gap junctions over which the signal can be transmitted.
3. Signals travel through the AV bundle and Purkinje fibers at a speed of 4 m/sec, the fastest in the conduction system.
4. The delay at the AV node is essential because it gives the atria time to fill with blood before they begin to contract.

The entire ventricular myocardium does not depolarize within 200 msec after the SA node fires, causing the ventricles to contract one after another; instead, they contract almost simultaneously due to the rapid electrical impulse conduction through the ventricular myocardium.

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LDL cholesterol causes plaque buildup in the arteries (option B).

Plaque is an abnormal accumulation of material in or on an organ of the body.

High blood levels of cholesterol encourage the formation and growth of vascular plaques that put you at risk for heart attack and stroke.

Plaque forms when cholesterol lodges in the wall of the artery. To fight back, the body sends white blood cells to trap the cholesterol, which then turn into foamy cells that ooze more fat and cause more inflammation.

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Inherited metabolic diseases are caused by a deficiency or absence in one or more enzymes needed for a metabolic pathway to function properly.

These enzymes are responsible for breaking down, converting, or producing specific molecules in the body. When one or more of these enzymes is missing or not working effectively, the metabolic pathway can't function correctly, which leads to the accumulation of certain substances or the deficiency of others.

This imbalance can result in a wide range of symptoms and health issues.

Inherited metabolic diseases, also known as inborn errors of metabolism, are often the result of genetic mutations that are passed down through families. These mutations can be inherited in various ways, such as autosomal recessive, autosomal dominant, or X-linked inheritance patterns.

Some common examples of inherited metabolic diseases include phenylketonuria (PKU), galactosemia, and Tay-Sachs disease.

Diagnosis of these conditions typically involves biochemical testing, genetic testing, and sometimes imaging or other diagnostic procedures. Treatment options may include dietary management, enzyme replacement therapy, or other supportive care measures, depending on the specific disease and its severity.

Early detection and intervention are crucial for managing many inherited metabolic diseases and improving long-term outcomes for affected individuals.

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The greatest biodiversity would be in an ecosystem with the same number of species as other ecosystems but which has no dominant species.(D)

An ecosystem with no dominant species has a more balanced distribution of species, allowing for greater biodiversity. This is because there is no single species outcompeting others for resources, leading to more niche opportunities for various species to coexist.

In contrast, ecosystems with dominant species or intense competition among dominant species tend to suppress the growth and diversity of other species, reducing overall biodiversity. By having no dominant species, the ecosystem can support a wider range of organisms and maintain higher levels of species richness and evenness.(D)

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According to Allen Baddeley, we consciously process incoming auditory and visual-spatial information in our working memory.

What are verbal and auditory working memory?

The sound (phonological) system is tapped into by verbal (auditory) working memory. Students use these working memory abilities if they are required to follow a lengthy set of oral instructions. When reading, a pupil who is still decoding words significantly relies on verbal working memory.

Working memory is a more recent theory of short-term memory that includes conscious, active processing of information retrieved from long-term memory as well as incoming auditory, visual, and spatial information.  Short-term memory and working memory are similar, but working memory lasts a little bit longer and is used to manipulate information.

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If a ray-finned fish is to both hover (remain stationary) in the water column and ventilate its gills effectively, then what other structure besides its swim bladder will it use is D) its operculum.

The operculum is a bony structure that covers and protects the gills of ray-finned fish. It allows for effective ventilation of the gills while the fish hovers in the water column. The swim bladder helps with buoyancy control but does not directly aid in gill ventilation. The pectoral fins and caudal fin aid in movement and maneuverability, but not specifically in hovering or gill ventilation. The lateral line system helps the fish sense changes in water pressure and movement, but is not directly involved in either hovering or gill ventilation.

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A ray-finned fish along with the swim bladder use its operculum to cover and protect its gills. Hence the correct answer is option d.

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Normal male (XY) x Heterozygous carrier female (XH Xh)

      XH         Xh

Y XY XH XY Xh

Y XY XH XY Xh

The Punnett square shows that there is a 50% chance of having a male child with normal blood clotting (XY) and a 50% chance of having a female child who is a heterozygous carrier (XH Xh).

Hemophiliac male (Xh Y) x Carrier female (XH Xh)

       XH         Xh

Y XHY XhY

Y XHXh XhXh

The Punnett square shows that there is a 50% chance of having a son with hemophilia (Xh Y), a 25% chance of having a son with normal blood clotting (XH Y), a 25% chance of having a daughter who is a heterozygous carrier (XH Xh), and no chance of having a daughter with hemophilia.

Color-blind male (Xh Y) x Heterozygous carrier female (XH Xh)

       XH         Xh

Y XHY XhY

Y XHXh XhXh

The Punnett square shows that there is a 50% chance of having a daughter who is a heterozygous carrier (XH Xh), a 25% chance of having a son with normal color vision (XH Y), and a 25% chance of having a son who is color-blind (Xh Y). There is no chance of having a daughter who is color-blind because the father only contributes a Y chromosome to his daughters.

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A cellular reaction with a ΔG of 8.5 kcal/mol could be effectively coupled to the hydrolysis of a single molecule of ATP (ΔG of -7.3 kcal/mol). This statement is False.

The Gibbs free energy change (ΔG) of a coupled reaction is the sum of the individual ΔG values. To couple effectively, the overall ΔG should be negative, indicating that the reaction is spontaneous. In this case:

ΔG of cellular reaction: +8.5 kcal/mol
ΔG of ATP hydrolysis: -7.3 kcal/mol

Combined ΔG: 8.5 + (-7.3) = +1.2 kcal/mol

Since the combined ΔG is positive (+1.2 kcal/mol), the reaction is not effectively coupled to the hydrolysis of a single molecule of ATP.

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The expected phenotype of the children of a color-blind woman and a man who is not color-blind is that all daughters will have normal color vision and all sons will be color-blind.

The expected phenotype of the children of a color-blind woman and a man who is not color-blind would depend on the genotypes of each parent. Since the gene for red-green color blindness is recessive and x-linked, the woman must have two copies of the recessive gene on her X chromosomes to be color-blind, while the man only has one X chromosome.

If the man is not color-blind and does not carry the recessive gene, then he must have an X chromosome with the dominant allele for normal color vision. Therefore, all of his daughters will inherit this dominant allele for normal color vision from him and will not be color-blind.

However, all of his sons will inherit his Y chromosome and his X chromosome with the recessive allele for color blindness from the woman. As a result, all of his sons will be color-blind. So, the expected phenotype of the children of a color-blind woman and a man who is not color-blind is that all daughters will have normal color vision and all sons will be color-blind.

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The expected phenotype of the children of a color-blind woman and a man who is not color-blind will either be carriers for the color blindness gene (if the man is homozygous dominant) or have a 50% chance of being carriers (if the man is heterozygous). None of their offspring will be color-blind since they did not inherit the recessive gene from both parents.

If the gene for red-green color blindness is recessive and x-linked, then the expected phenotype of the children of a color-blind woman and a man who is not color-blind will depend on the genotypes of both parents.

The woman must be homozygous recessive for the color blindness gene (bb) since she is color-blind. The man, who is not color-blind, can either be homozygous dominant (BB) or heterozygous (Bb) for the gene.

If the man is homozygous dominant (BB), then all of their offspring will be carriers for the color blindness gene but will not express the phenotype.

If the man is heterozygous (Bb), then there is a 50% chance that their offspring will inherit the color blindness gene from the mother and a 50% chance that they will inherit a normal vision gene from the father.

Therefore, the expected phenotype of the children of a color-blind woman and a man who is not color-blind will either be carriers for the color blindness gene (if the man is homozygous dominant) or have a 50% chance of being carriers (if the man is heterozygous). None of their offspring will be color-blind since they did not inherit the recessive gene from both parents.
The expected phenotypes of the children of a color-blind woman (XcXc) and a man who is not color-blind (XCY) would be as follows:

1. All daughters will be carriers of the color-blind gene (XcX).
2. All sons will be color-blind (XcY).

This is because the mother will always pass on one of her recessive Xc alleles, and the father will pass on either an X or Y chromosome, determining the child's sex and phenotype.

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If you were asked to remember a list of items while scuba diving, your ability to recall that list would be worse if you were asked to do so while back on dry land. This is due to a phenomenon called context-dependent memory.

This is about the effect of scuba diving on the ability to recall a list of items.  This is due to a phenomenon called context-dependent memory. Context-dependent memory suggests that our ability to recall information is better when we are in the same environment in which we learned the information. So, when you learn the list underwater while scuba diving, you may struggle to recall it on dry land because the context has changed.

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All cells have DNA, cytoplasm, ribosomes, and a plasma membrane.All eukaryotic cells have DNA, ribosomes, cytoplasm, and the plasma membrane seen in prokaryotes.

Structures are shared by bacterial and eukaryotic cells.Many organelles are connected by membranes made of phospholipid bilayers enmeshed with proteins to compartmentalise processes like the storage of hydrolytic enzymes and protein synthesis.

By examining a few crucial characteristics, it is possible to see proof that these organelles have extracellular origins: Double membrane-bound membranes The vulnerability to antibiotics (Replication method) division

While, the micro-organism lacking mitochondria may nonetheless contain certain mitochondrial proteins,

similarities between the genetic coding of proteobacteria and mitochondria, and mitochondrial DNA contains genes that are not present in the nuclear DNA, indicating genetic similarities.

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The process in which light energy from objects hits Sarah's retina, gets translated into a neural code, and is interpreted by her brain during her evening walks is called "visual perception."

Visual perception refers to the process by which the brain interprets and makes sense of the information it receives from the eyes. It is a complex and dynamic process that involves the integration of information from different sensory modalities, as well as the application of prior knowledge and expectations.

The visual perception process begins with the capture of light by the eye's sensory receptors, known as rods and cones, which are located in the retina. These receptors detect the different wavelengths of light that correspond to different colors and shades of brightness.

The information gathered by the rods and cones is then transmitted to the brain via the optic nerve. Once it reaches the brain, this information is processed by a complex neural network in the visual cortex.

In the visual cortex, the information is first analyzed and broken down into its basic features, such as lines, edges, and shapes. These features are then combined to form more complex objects and scenes.

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Insulin, a protein hormone, is synthesized and processed in the rough endoplasmic reticulum (RER) of the beta cells of the pancreas.

After the synthesis of insulin, it undergoes post-translational modifications, such as folding and addition of carbohydrate groups in the RER. Then, it moves to the Golgi apparatus through the smooth endoplasmic reticulum (SER) for further modifications, including sorting and packaging. In the Golgi apparatus, insulin undergoes further modifications, such as glycosylation, before being packaged into vesicles for secretion.

Therefore, the order of passage for insulin through the endoplasmic reticulum would be RER (rough endoplasmic reticulum) first, followed by the SER (smooth endoplasmic reticulum) before reaching the Golgi apparatus for further processing and secretion.

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Insulin, a hormone, is synthesized in the rough endoplasmic reticulum (RER) and then transported to the smooth endoplasmic reticulum (SER) for further processing and packaging before being secreted by the cell.

Insulin is synthesized in the rough endoplasmic reticulum (RER), where it undergoes post-translational modifications such as folding and glycosylation. After processing in the RER, insulin is transported to the Golgi apparatus for further modification and packaging into vesicles. These vesicles then move towards the plasma membrane for secretion. Therefore, the order would be RER -> Golgi apparatus -> secretion.

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Answer:

a. fungal, nails

Explanation:

it is a fungal infection in the fingernails or toenails

Individual inferior fungi are often much smaller than superior fungi.

The kingdom of fungi is a varied collection of creatures that is distinct from those of bacteria, plants, and mammals. Because they act as decomposers, breaking down decaying organic materials and recycling nutrients, fungi play significant roles in ecosystems.

Inferior fungi are thought to be less developed and structurally complex than superior fungus. They frequently lack the intricate characteristics present in superior fungus, such as gills or holes, and generally have simpler fruiting structures, such as cups or cushions. Aside from that, lesser fungus could be smaller in size and generate fewer spores overall.

On the other hand, superior fungi are often thought to be more complicated in their growth and structure. They frequently have more intricate fruiting structures, like mushrooms, and may have unique spore-dispersal characteristics like gills or pores. Additionally, superior fungus could be bigger and make more spores than inferior fungi.

It's crucial to remember, though, that due to the extensive and diverse diversity of the fungi kingdom, these labels are not always appropriate or applicable. Furthermore, the labels "inferior" and "superior" have a negative connotation and are not frequently employed in contemporary mycology.

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The primary gluconeogenic organ in animals is D) liver. So the correct option is option d).

Gluconeogenesis is the process of synthesizing glucose from non-carbohydrate sources, such as amino acids, lactate, and glycerol. This process is essential for maintaining blood glucose levels during periods of fasting or low carbohydrate intake, as glucose is a critical energy source for many cells, including those in the brain.

The liver is the primary organ responsible for gluconeogenesis due to its unique ability to regulate the production and release of glucose into the bloodstream. The liver can store glucose in the form of glycogen and break it down when necessary to maintain a stable blood glucose level. When glycogen stores are depleted, the liver turns to gluconeogenesis to create glucose from other sources.

The other options provided, such as A) skeletal muscle, B) kidney medulla, C) kidney cortex, and E) heart muscle, do not primarily carry out gluconeogenesis. While the kidney cortex can also perform gluconeogenesis, it plays a secondary role to the liver. The skeletal muscle, kidney medulla, and heart muscle have other primary functions and are not significantly involved in gluconeogenesis. Therefore, option d) liver is the correct answer as the primary gluconeogenic organ in animals.

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The maculopapular rash shown in the image is indeed associated with measles, which is caused by the measles virus.

Measles is a highly contagious viral infection that is transmitted through respiratory droplets when an infected person talks, coughs or sneezes. The virus then enters the body through the nose or mouth and spreads to the lymphatic system, causing fever, cough, runny nose, and conjunctivitis.

The characteristic rash of measles typically appears a few days after the onset of these symptoms, starting on the face and then spreading to the rest of the body. Measles is a preventable disease, and vaccination is the most effective way to protect against it.

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Desert plants are characterized by Succulent stems .

The correct option is B .

Broad leaves are generally not common in desert plants because they lose water through transpiration, which is the process of water loss from plant leaves. Therefore, desert plants have evolved to have small or narrow leaves to minimize water loss. Succulent plants are a good example of this adaptation. Succulents are characterized by their thick, fleshy stems and leaves, which are able to store large amounts of water for long periods of time.

Also,  many desert plants have evolved to retain their leaves year-round, instead of shedding them seasonally like many other types of plants. This adaptation helps to conserve water, as shedding leaves is another way of losing water.

Hence , B is the correct option

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The fact that genetic differences can be amplified by nurture demonstrates that nature and nurture both play a role in shaping individual characteristics.

This interplay between nature and nurture helps explain why two individuals with similar genetic makeup can end up with very different outcomes.

Nurture refers to environmental influences such as parenting, education, and culture, which can interact with genetic makeup to influence an individual's development and behavior. For example, a genetic predisposition for aggression can be amplified by a hostile home environment.

Conversely, a genetic predisposition for intelligence can be enhanced by a stimulating home environment. Thus, both nature (genetics) and nurture (environment) are important factors in determining an individual's characteristics and behaviors.

This interplay between nature and nurture helps explain why two individuals with similar genetic makeup can end up with very different outcomes.

In conclusion, the fact that genetic differences can be amplified by nurture demonstrates that both nature and nurture have an important role to play in individual development. Genetics provides the blueprint, but it is the environment which helps determine how that blueprint will be expressed.

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Answer:

Explanation:

The longest cytoplasmic projection from a neuron is the "axon."

The axon is a long, slender cytoplasmic projection that extends from the cell body of a neuron and transmits electrical impulses away from the cell body to other neurons, muscle cells, or glands. The length of an axon can vary widely, ranging from a few micrometers to over a meter in length in some cases.

Axons are specialized for rapid and efficient transmission of nerve impulses, and they are covered by a fatty insulating layer called myelin, which helps to speed up the transmission of impulses. At the end of the axon, specialized structures called synaptic terminals allow the neuron to communicate with other neurons or target cells through the release of neurotransmitters.

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Bats are the only mammals to evolve powered flight. They  d. all of the above.

About 55 million years ago, during the Eocene period, bats first emerged. They are a varied group of mammals, although the majority are little, and some of them resemble shrews. Through the utilisation of sound wave reflection, the bats employ ultrasound to quickly dispatch their prey.

The ultrasonic signal is created by the bats and is reflected off of the prey as it gets closer to the bats' ears. This aids the bat in determining the prey's distance. Bats also mostly consume insects, however some species also consume fruit, nectar, and blood. In addition, powered flight is a remarkable and rare adaptation that has only been acquired by bats, allowing them to fill a range of ecological niches.

Complete Question:

Bats are the only mammals to evolve powered flight. They

a. appear in Eocene time

b. are small, shrew-like mammals

c. are mostly insectivores

d. all of the above

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If a mouse has a mutation in the gene that codes for amylase, it means that it cannot produce a functional amylase enzyme, which is responsible for breaking apart starch molecules into maltose.

As a result, the mouse would not be able to digest starch effectively, and there would be a buildup of undigested starch in its digestive tract.

However, since the mouse has a functional gene for maltase and can produce plenty of functional maltase enzyme, it would still be able to break down maltose into glucose. This means that the mouse would still be able to obtain some energy from the diet of pure starch, although it would not be able to fully digest it.

In terms of the most likely outcome, the mouse may experience digestive discomfort, such as bloating or constipation, due to the undigested starch in its digestive tract. It may also have lower overall energy levels due to the incomplete digestion of the starch.

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Answer:

A. dominant

Explanation:

Glycolysis - Investment Phase: The molecules involved in the phosphorylation of glucose in the investment phase of glycolysis are ATP (adenosine triphosphate), glucose, and enzymes such as hexokinase and phospho glucose isomerase.

Glycolysis - Payoff Phase: The figure for carrier electrons in the payoff phase of glycolysis is NADH (nicotinamide adenine dinucleotide). During glycolysis, NAD+ (nicotinamide adenine dinucleotide) is reduced to NADH by accepting electrons from the oxidation of glucose to form pyruvate. NADH is an important carrier of electrons that can be used in the later stages of cellular respiration to generate ATP.

Processes of Cellular Respiration in Cytoplasm: Glycolysis, which is the initial step of cellular respiration, occurs in the cytoplasm of the cell. It is a series of enzymatic reactions that convert glucose into two molecules of pyruvate, producing a small amount of ATP and NADH in the process.

Processes of Cellular Respiration in Mitochondria: After glycolysis, the pyruvate molecules produced are transported into the mitochondria, where further processes of cellular respiration occur.

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Glycolysis is the process of cellular respiration happening in the cytoplasm. Krebs cycle and electron transport chain happens in the mitochondria.

Cellular respiration happening in cytoplasm and mitochondria:

1. The molecules involved in the investment phase of glycolysis, where glucose is phosphorylated, are ATP and glucose. ATP is used to transfer a phosphate group to glucose, forming glucose-6-phosphate. Then, another ATP molecule is used to transfer another phosphate group to glucose-6-phosphate, forming fructose-1,6-bisphosphate.

2. In the pay-off phase of glycolysis, carrier electrons are passed on to NAD+ to form NADH. The figure for carrier electrons is NADH, which is produced during the conversion of glyceraldehyde-3-phosphate to 1,3-bisphosphoglycerate.

3. Glycolysis, which occurs in the cytoplasm, is the process of breaking down glucose into pyruvate. The processes of the Krebs cycle and electron transport chain, which involve the use of oxygen and occur in the mitochondria, are responsible for producing the majority of ATP in cellular respiration. The Krebs cycle occurs in the mitochondrial matrix, while the electron transport chain occurs in the inner membrane of the mitochondria.

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