Answers
Answer: B
Explanation: The currently accepted model of the membrane is the fluid mosaic model. S. J. Singer and G. Nicolson proposed the fluid mosaic model in 1972.
The cell membrane model depicts the arrangement of the biological membrane and its component. The fluid mosaic model was given by Singer and Nicolson in 1972. Thus, option B is correct.
What is the fluid mosaic model?
The fluid mosaic model was discovered by Singer and Nicolson and is a widely accepted model for the structural organization of the plasma membrane and its components. It elucidates the mosaic of plasma components.
The proteins, lipids, and carbohydrates are the main components of the plasma membrane that are arranged and shows the fluid nature of the biological membrane.
Its arrangement and structure allow the semi-permeable nature and its role as the barrier. It shows the membrane is a lipid bilayer that includes the hydrophobic tail and the hydrophilic head.
Therefore, the fluid mosaic model was given by Singer and Nicolson.
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Related Questions
As observed in Protein Workshop, the guanidinobenzoyl group of the substrate is bound to the domain of the protein that ___________ contain the L1 and L2 regions.
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PLEASE ANSWER QUICK!The Greek roots of the word prokaryote mean “before nucleus.” Describe the way that DNA is organized in prokaryotic cells without the help of a nucleus. How does this approach differ from the way that eukaryotic cells organizes their DNA
Answers
Answer:
Prokaryotic cells' DNA are located in the cytoplasm of the cell rather than in the nucleus, like in eukaryotic cells. DNA aids in protein synthesis and determines functions of the cell in cells, regardless of being within the membrane of a nucleus or not.
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I hope this helps a little.
The word prokaryote in Greek means before kernel (nucleus). Unlike the eukaryotic cells, the nuclear material is located in the cytoplasm of the cell in a nucleoid.
What are the characteristics of prokaryotic cells?The prokaryotic cells are the primitive karyons that are defined by the lack of the true nucleus and organelles. Unlike the eukaryotes, the organelles lack the membrane that covers them but has a tough cell wall.
The prokaryotes include archaea and bacteria which are unicellular and microscopic organisms that are simple and have their genetic material organized into nucleoids in the center of the cell. They have the ability to live in harsh conditions.
Therefore, the eukaryotes and prokaryotes differ in the arrangement of the genetic material.
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Please answer the following Anthropology questions fully, thoroughly, and in depth.
Part i. What adaptations are associated with an insectivory diet? Give an example of a primate that has this diet.
Part ii. What adaptations are associated with a gummivory diet? Give an example of a primate that has this diet.
Part iii. What adaptations are associated with a frugivory diet? Give an example of a primate that has this diet.
Part iv. What adaptations are associated with a folivory diet? Give an example of a primate that has this diet.
Part v. What adaptations are associated with vertical clinging and leaping? Give an example of a primate that practices this form of locomotion.
Answers
The examples that you need are 1-Gummivory: marmoset, tamarins; 2-Frugivores: spider monkey, ray-bellied night monkey (owl monkey); 3-Folivory: howler monkey, leaf monkey, colobine; and 4-Vertical clinging and leaping: lemurs and tarsiers
A gummivore is an animal (in this case, a primate) with a feeding strategy that depends on the sap or gum from trees. It is a type of diet that consists primarily of exudates. Some adaptations observed in these species include: 1-specialized anterior teeth in order to stab bark; 2-well-developed claws for clinging to trees
Frugivores primates have a feeding strategy mainly based on raw fruits. Some adaptations observed in these species include 1-low rounded molar cusps and 2-broad incisors.
Folivore primates (also called leaf-eating monkeys) have a feeding strategy mainly based on leaves. Some adaptations observed in these species include 1-narrow incisors, 2-broad molars (high shearing crests), 3-thin enamel molars.
Vertical clinging and leaping is an arboreal locomotor pattern practiced by lemurs and tarsiers. These animals push off from one vertical support with their hindlimbs to land on another vertical support. Some adaptations observed in these species include 1-hips, knees, feet, arms, and tails that facilitate climbing and leaping, 2-large hip extensor muscles and 3-specialized minor muscles.
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A purebred tall pea plant is cross-pollinated with a tall, heterozygous pea plant. Use a Punnett square to determine the probability the offspring inherita
recessive short allele. (I point)
75%
25%
0%
50%
Answers
Answer:
50%
Explanation:
because if you use the box method you see that half receive a short alele.
T t
T TT Tt
T TT Tt
Fermentation converts organic material into a fuel whose primary component is
A. methane
B. sugar
C. yeast
D. alcohol
Answers
Answer:
D. alcohol
Explanation:
Fermentation by microorganisms converts organic materials into alcohol
Which of the following statements is compatible with Darwin’s theory of evolution? much of the variation in individuals of a population is heritable resources are unlimited survival depends mostly on luck members of a population are usually very much alike in their characteristics
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Answer:
A. much of the variation in individuals of a population is heritable
Explanation:
Charles Darwin is a scientist well known for his development of the concept of evolution. Darwin was able to deduce that the species of a population have a common ancestor and that as time passes there is a modification in the characteristics of these species that makes it easier for them to adapt to their environments. These traits that were inherited from past descendants, were helpful traits that made it possible for their own descendants to be able to survive better than their peers. He noted that there were limited resources for survival, therefore it was a case of the survival of the fittest.
Natural selection was the term used by him to describe how species of a population survived over time. Members of a population had varied traits that enabled them to survive. For example, the descendants of an ancestor could have slightly different shapes, colors, sizes, and other features but still maintain traceable heritable traits.
What term matches the following definition: " ...a fundamental evolutionary process that results in both the adaptation of species to their environments and the generation of biodiversity (new species)"?
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Answer:
a.Natural selection
b.Evolution
c.Artificial selection
d.Co-evolution
The correct option is A.
Natural selection.
Explanation:
The correct answer is natural selection because Natural selection is an evolutionary process which was discussed by Charles Darwin in 1859, In one of his theory that it is the ability of organisms to develop traits or characteristics that will help them to adapt and ensure their survival in their environment and then passing or transferring these new traits to new species or offsprings over generations through reproduction.
provide the labels of the angiosperm flower shown below
Answers
Explanation:
1.peduncle
2.ovary
3.sepal
4.petal
7.stigma
12.receptacle
13.style
8.ovule with enbryo sac
____________ a regulatory protein that may bind DNA to inhibit transcription. ____________ a DNA sequence that binds a regulatory protein. ____________a DNA sequence that binds RNA polymerase and regulates transcription. ____________a compound that interacts with another protein or compound to form an active repressor ____________a compound that induces or activates transcription, such as lactose.a. Repressorb. Operator c. Promoterd. Corepressore. Inducer
Answers
Answer:
A repressor is a regulatory protein that may bind DNA to inhibit transcription. An operator is a DNA sequence that binds a regulatory protein. A promoter is a DNA sequence that binds RNA polymerase and regulates transcription. A corepressor is a compound that interacts with another protein or compound to form an active repressor. An inducer is a compound that induces or activates transcription, such as lactose.
Explanation:
Repressor proteins bind to DNA and RNA to suppress target gene expression. A DNA repressor blocks transcription by inhibiting the attachment of RNA polymerase to the promoter sequence, while an RNA repressor bind to the mRNA to block translation of the protein. An operator is a DNA sequence required for the attachment of transcription factors. The genes that are transcribed by the binding of a transcription factor to an operator sequence are collectively referred to as an operon. Operons are generally found in prokaryotes but they also can be found in some eukaryotes including Caenorhabditis elegans and Drosophila melanogaster. An inducer is a molecule that activates gene transcription either by binding to repressors/corepressors (thereby inactivating their functions) or by binding activators. For example, the allolactose act as an inducer of the lac operon.
Is talc renewable???
Answers
Answer: Talc is a nonrenewable resource.
Explanation:
Talc is a mineral, which counts as a nonrenewable resource. Minerals, fossil fuels, and ores are nonrenewable resources because they do not regenerate or renew themselves at a quick enough rate and often take long periods of time to replenish.
A purebred tall pea plant is cross-pollinated with a tall, heterozygous pea plant. Use a Punnett square to determine the probability the offspring inherita
recessive short allele. (I point)
75%
25%
0%
50%
Answers
Answer:
0%
Explanation:
This question involves a gene coding for height in pea plants. The allele for tallness (T) is dominant over the allele for shortness (t). This means that allele T will be expressed over allele t in an heterozygous state.
A purebred tall plant will possess genotype: TT while a heterozygous tall plant will possess genotype: Tt. The two parents will produce the following gametes:
TT- T and T
Tt- T and t
Using these gametes in a punnet square (see attached image), the following offsprings with genotypes: TT and Tt in a ratio 1:1 will be produced.
TT offsprings are purebreed tall while Tt offsprings are heterozygous tall. Hence, based on the question, no offsprings of this cross will possess the recessive genotype (tt). This means that 0% of the offsprings of this cross will be short.
What are the biological methods of controlling mosquito population?
Answers
Explanation:
Biological control or "biocontrol" is the use of natural enemies to manage mosquito populations. ... Effective biocontrol agents include predatory fish that feed on mosquito larvae
Which of the following pairs of plants are rhizomes?
A. Cocoyam and Cassava
B. Canna lily and ginger
C. Onion and Garlic
D. Banana and plantain
Answers
Answer:
B.
Explanation:
Examples of plants that are propagated this way include hops, asparagus, ginger, irises, lily of the valley, cannas, and sympodial orchids. Some rhizomes that are used directly in cooking include ginger, turmeric, galangal, fingerroot, and lotus.
If the gene encoding one of the proteins that forms cohesin were mutated such that cohesin could not perform its normal function, what would be the consequence? Check all that apply.
Answers
Answer:
The following apply:
- Chromosomes would not be able to condense.
- Chromosomes would not be able to properly align at the metaphase plate.
- The separation of sister chromatids would not likely occur specifically during anaphase A.
- The nuclear envelope would not be able to reform.
Help with this please anyone!!!
Answers
Answer:
top right
Explanation:
g You can find the results of the seedling experiment hereLinks to an external site.. Carry out the hypothesis test that you have identified in the previous problem; which is closest to the p-value that you obtain?Group of answer choices0.040.080.090.61
Answers
Answer:
0.080
Explanation:
The seedling experiment is the mobilization of reserves during the seed experiment. Development of embryo exist in the seedling. When the test is carried out the p-value obtained is near to 0.781 which is approximately 0.080. The calculation is 10 * 0.07 / 8.75 after solving the equation which we get is 0.080.
¿Qué características crees que deben tener los métodos anticonceptivos para ser eficaces en el control de la natalidad?
Answers
Answer:
Los métodos anticonceptivos para ser eficaces en el control de la natalidad deben ser seguros para las personas que los utilizan, es decir, no tener efectos adversos, o al menos, la menor cantidad posible. Ser reversibles, es decir, que no generen infertilidad de por vida. Deben ser además fáciles de usar, cómodos y fáciles de conseguir, esto es, económicos. Además deben ser eficientes en su objetivo de evitar la concepción, que es para lo que fueron creados.
Explanation:
La tasa de eficacia de un método anticonceptivo se mide por la cantidad de embarazos que se producen cada 100. Esta parece ser la característica más importante, y si bien es una de las más importantes, hay que tener en cuenta todos los otros factores mencionados, es decir que la gente pueda acceder a ellos, sean cómodos, seguros y a un precio coherente.
What do MSDS sheets do?
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Answer:
The MSDS lists the hazardous ingredients of a product, its physical and chemical characteristics (e.g. flammability, explosive properties), its effect on human health, the chemicals with which it can adversely react, handling precautions, the types of measures that can be used to control exposure, emergency and first....
Explanation:
thats basically what they are lol yea okay yea no
I need help please ??????!!!
Answers
hi i haven't done physics for like 3 yrs but i'm pretty sure
the one on top is a rarefaction
number 2 a compression since it's all compressed together
and number 3 has to be wavelength since that's the measure of a single wave
explain the scientific theory of evolution and the evidence scientist found that proves it to be valid ?
Answers
Answer:
There are many theories
But main evidences are
Fossils of Plants animals and other organisms who lived on this planet at sometime. Oprain And Halden theory which suggests the chemical and biological evolution.the oceanic zone is
Answers
Answer:
The oceanic zone is the region of open sea beyond Continental shelf.
The mechanisms regulating sodium and water balance help maintain blood pressure homeostasis. These mechanisms include the renin-angiotensin II mechanism, neural regulation, and ADH.
Match each item to the appropriate category. Keep in mind relationships may be direct or indirect.
Categories:
1. Angiotensin II.
2. Sympathetic Nervous System
3. Both
a. stimulates ADH release
b. stimulates renin release
c. stimuates aldosterone release
d. increases sodium uptake
e. increases water reabsorption
f. stimulates vasoconstriction
g. increases peripheral resistance
h. stimulated by baroreceptors in blood vessels
i. stimulated by low blood pressure or volume
Answers
Answer:
a. stimulates ADH release : 2. Sympathetic Nervous System
b. stimulates renin release : 2. Sympathetic Nervous System
c. stimulates aldosterone release: 3. Both
d. increases sodium uptake : 1. Angiotensin II
e. increases water reabsorption: 2. Sympathetic Nervous System
f. stimulates vasoconstriction: 1. Angiotensin II.
g. increases peripheral resistance : 1. Angiotensin II.
h. stimulated by baroreceptors in blood vessels: 2. Sympathetic Nervous System
i. stimulated by low blood pressure or volume: 3. Both
Explanation:
The antidiuretic hormone is one of the hormones released by the hypothalamus (regulator center in the brain) and collected by the posterior hypophysis from where they are then released again to the system. This hormone, also known as vasopressin hormone, is released by changes in serum osmolarity or blood pressure. The osmotic receptors are located in the hypothalamus, while the pressure receptors are located in the heart, the aorta, and carotids. The amount of hormone secreted depends on these two aspects. Its function is to keep homeostasis and make kidneys conserve or excrete water to regulate its volume. The antidiuretic hormone stimulates water reabsorption when factors such as dehydration or hemorrhages are causing an increase in blood solutes. It might also stimulate water excretion when solutes in the blood are very low or blood pressure is too high.
Aldosterone is another hormone that acts stimulating the sodium ions reabsorption. This hormone production is controlled by a circuit named the renin-angiotensin-aldosterone system. This system is activated by the decrease of blood supply to the kidney, and hence, the decrease in blood pressure and sodium concentration. These factors cause the release of the renin, a proteolytic enzyme that acts on angiotensinogen producing angiotensin I which is converted into angiotensin II. Angiotensin II is a peripheric vasoconstrictor peptide, that can increase the blood pressure when it is circulating in the plasma. It also stimulates the secretion of aldosterone.
What happens when the density of a medium increases?
Answers
Should we include viruses in the domains of life ? Why ?
Answers
Answer:
Today, there is no solid evidence for the existence of a viral domain of life or for a significant implication of viruses in the origin of the cellular domains.
Explanation:
During the performance of the simple staining procedure, you failed to heat fix your E-coli smear preparation. Upon microscopic examination , how would you expect this slide to differ from the correctly prepared slides ?
Answers
OMG I'm a business study Student so I really don't know about this stuff
Watch the video and answer the question in 2 or 3 paragraphs. What are the main causes of air pollution? Discuss some effects of air pollution and provide possible solutions to this environmental issue. https://youtu.be/_dTtvtlct9k
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Answer:
Explanation:
Exhaust from vehicles, factories, volcanoes and wildfires are the major causes of air pollution.
Effects of air pollution include many diseases. For example heart disease, lung disease, respiratory diseases etc... They also damage nerves, brain, kidney, lungs, heart etc...
Solution to air pollution:
We should replace the fossil fuels with natural energies like solar, wind, geothermal, hydro etc...
Waste water treatment
Dust control
Hope this helps
plz mark as brainliest!!!!!!
6. Which of the following does not allow observation of living organisms?
a) Bright field microscopy
b. Phase contrast microscopy
c) Fluorescent microscopy
d. Dark Field microscopy ...
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HELP ASAP PLEASE HELP FAST
Answers
Answer:
D. the basic unit of life
Explanation:
A cell is the basic fundamental unit of a living organism. There two types of organisms which are unicellular (single cell organism) and multicellular (many cells)
Breast milk is naturally formulated to meet the nutritional needs of a growing infant.
a. True
b. False
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is the following nuclear equation balanced?