Answer:
Transcriptional regulators function to regulate the expression of different genes and also to affect the expression of other transcriptional regulators, thereby the combination of a few transcriptional regulators is sufficient to modulate gene expression patterns
Explanation:
Transcriptional regulators are able to control gene expression by binding to cis-regulatory elements on the genome. For example, in plants, MADS-box proteins are transcriptional regulators that contain an evolutionary conserved DNA-binding domain (i.e., MADS-box domain) which regulate simultaneously the expression of many different genes by binding to a conserved DNA motif called CArG box [CC(A/T)6GG] located in the promoter region of many genes expressed at specific stages of plant development. Within the cell, transcription regulators function not only by controlling the expression of different genes but also by affecting each other's activity, thereby creating different combinations where the expression of a limited number of transcription regulators is sufficient enough to regulate gene expression patterns.
Which one ??????????
If you squeeze the bottom of a closed tube of toothpaste, the pressure is increased ____.
a.
on the bottom of the tube
c.
on the sides of the tube
b.
on the top of the tube
d.
everywhere in the tube
Please select the best answer from the choices provided
A
B
C
D
I I am really really confused about these two questions does anybody know the answer to both of them
Answer:
1) Topographic maps show contours, elevation, forest cover, marsh, pipelines, power transmission lines, buildings and various types of boundary lines such as international, provincial and administrative, and many others. (Answer: Elevation)
2) Contour line, a line on a map representing an imaginary line on the land surface, all points of which are at the same elevation above a datum plane, usually mean sea level. The diagram illustrates how contour lines show relief by joining points of equal elevation. (Answer: Contour Line)
What are the two main ways bacteria cause illness?
A. By releasing toxins that poison your cells
B. By using your cells to make copies of themselves
C. By changing the genetic material inside your cells
D. By breaking down your cells for nutrients
Answer:
A. By releasing toxins that poison your cells
B. By using your cells to make copies of themselves
Explanation:
Within the body, bacteria can divide (multiply) and kill host cells by disrupting their normal functioning. Moreover, bacteria secrete toxins that are able to destroy host cells' metabolic machinery. For instance, many bacteria synthesize exoenzymes and interferons that disrupt and destroy host cells. Bacterial toxins can be synthesized internally in order to develop sensitivity through antigenic properties.
PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!
Answer:
the answer is d, student 2 exercises more often then student 1. he also has better sleep.
Explanation:
Compare and contrast the autonomic and somatic nervous divisions with respect to
effectors, neurotransmitters, and output cell organization/anatomy.
Answer:
The somatic nervous system has sensory and motor pathways, whereas the autonomic nervous system only has motor pathways. The autonomic nervous system controls internal organs and glands, while the somatic nervous system controls muscles and movement.
Explanation:
Why is stem cell research important within the field of medicine?
15. Suppose a human blood cell containing a 0.9 percent solute concentration were put into a container of 30 percent solute solution. Would the blood cell get bigger or smaller? Why? In your explanation, you must tell me which area has the hypotonic solution (inside the blood cell or outside the blood cell), which area has the hypertonic solution (inside the blood cell or outside the blood cell), and which direction the water would be moving (into the cell or out of the cell).
Answer:
Smaller
Explanation:
The human blood cell has a smaller percentage of solute concentration than the solution it was placed into. This means that the cell is hypotonic in comparison to the solution, and the solution is hypertonic compared to the cell. When a cell is placed in a hypertonic solution it undergoes crenation, meaning it shrivels up. Water moves from the lower solute concentration to the higher solute concentration. The water inside the cell moves outside to the hypertonic solution. This causes the cell to become smaller.
g Type I diabetes is caused by destruction of the beta cells of the pancreas, the cells that produce insulin. In most cases, the beta cells are destroyed by an immune response. Both genetic and environmental factors are involved in triggering the immune response. A. The immune system usually does NOT destroy the beta cells. If the cells are destroyed, it is a failure of (memory) (specificity)(tolerance) (any one of these) (none of these).
Answer:
it is a failure of tolerance (self-tolerance) and specificity (recognition)
Explanation:
Type 1 diabetes is a chronic disease caused by the selective destruction of β cells that are involved in the production of insulin in the pancreas. Type 1 diabetes can be classified into two types: Type 1A diabetes (the immune form of the disease) and Type 1B diabetes (the non-immune form of the disease). Type 1A diabetes is considered an autoimmune disorder where immune responses against pathogens suffer a failure of tolerance to antigens in the β-cells of the pancreatic islets. Thus, Type 1A diabetes is characterized by the process of recognition of β-cell antigens (autoantigens) by the immune system. This disease is often caused by genetic factors associated with mutations in the human leukocyte antigen (HLA) class II region located on chromosome 6.
A
What arccorticoids?
Answer: Any of a group of steroid hormones produced in the adrenal cortex or made synthetically.
Explanation: If you mean "corticoid", then that's what it is.
What is the Society of American Foresters?
A union
A business
A government agency
A professional organization
According to the law of conservation of energy, what can happen to the total
energy of a system?
A. The total energy must remain the same, but energy can change
forms and be transferred within the system.
B. Energy must be transferred out of a system if energy is transferred
into the system so that they total energy of the system stays the
same.
C. The total energy can decrease when energy is lost due to energy
transformation within the system.
D. The total energy can increase if energy is transferred into the
system from surroundings.
SUBMIT
Answer:
the total energy must remain the same,but energy can change forms and be transferred within the system
What structures act as filters to trap pathogens and damaged cells as lymph flows through them?
Answer:
Spleen
Explanation:
The is because the spleen is an organ found in upper section of the abdomen spleen acts as a filterand it help to remove old and damaged cells . It also play a major role in controlling the amount of blood and blood cells that move round the body. The spleen also helps remove pathogens. It contains white blood cells called lymphocytes and macrophages.
Summer is coming and we are ready to get out and get in the sun. However, sun light has some ultraviolet light. When a UV photon is absorbed by a molecule of DNA, there are different ways the energy can be absorbed. One of the ways is that the energy of the photon can be converted into vibrational energy of the molecular bonds. Excessive vibration can damage the molecule by causing the bonds to break. UV light of less than 290 nm causes significant damage to DNA and UV light of longer wavelength causes minimal damage. What is the threshold photon energy, in eV, for DNA damage
Answer:
The threshold photon energy for DNA damage = 4.28 eV
Explanation:
According to the Planck - Einstein's equation, the energy of a photon, E is proportional to its frequency; E = hf where f is frequency and h is Planck's constant.
Also, frequency, f = velocity /wavelength
f = c/λ where c is the velocity of light
E = hc/λ
h = 6.63 × 10^-³⁴ Js;
c = 3.0 × 10⁸ m/s;
Threshold wavelength, λ = 290 nm = 2.9 × 10^-7 m
E = (6.63 × 10^-³⁴ × 3.0 × 10⁸) / 2.9 × 10^-⁷
E = 6.85 × 10^-¹⁹ J
1 ev = 1.602 × 10^-¹⁹ J
6.85 × 10^-¹⁹ J = 6.85 × 10^-¹⁹ J × 1 eV / 1.602 × 10^-¹⁹ J = 4.28 eV
Therefore, the threshold photon energy for DNA damage = 4.28 eV
Please help me understand what I did wrong, Thanks
When a meteor crosses the sky, the light given off is caused by
O Friction
Gravity
O Solar Winds
O Erosion
Answer:
the answer is EROSION, I Believe
Answer:
Friction
Explanation:
What pattern of inheritance is represented punnet square
Answer:
Autosomal Dominant Inheritance
Explanation:
Take any two words and connect them to form a sentence about photosynthesis.
____________ and ___________ go together because_______________________.
Terms:
Calvin Cycle
Carbon Dioxide
Chlorophyll
Chloroplast
Glucose
Leaf
Light
Light Dependent Reaction
Light Independent Reaction
Oxygen
Photosynthesis
Pores
Product
Reactant
Root
Starch
Sun
Water
Answer:
Solution:
plant's takes carbon dioxide ,water ,sunlight,and minerals and produce glucose and excrete out oxygen:
The disease multiple sclerosis makes it more difficult for signals from the brain and spinal cord to travel along nerve fibers. How will multiple sclerosis
affect other body tissues?
O Connective tissue will increase its fat storage.
O Muscle tissue will contract uncontrollably.
Epithelial tissue will lose the ability to protect against infection.
Tendons and ligaments will become brittle and break.
Answer:
O Muscle tissue will contract uncontrollably.
Explanation:
Multiple sclerosis, also known as encephalomyelitis disseminata, is a disease that affects the brain and spinal cord. Some of the most common symptoms of multiple sclerosis include vision problems, arm or leg movement and balance. This disease occurs when the immune system attacks the myelin sheath that covers nerve cells in the brain and spinal cord, causing inflammation and subsequent damage of the sheath and the nerve fibers it surrounds. Multiple sclerosis may cause muscle twitches when nerve fibers are damaged, thereby disrupting the signaling between nerves and muscles.
2. A certain recessive, lethal gene is carried on the X chromosome. (Lethal genes are those that result in death.) A man marries a woman who is hybrid for this gene. What sex ratio would be expected among the living children of this couple?
%Male
%Female
Please help me im stuck!
Explain why one city receives 10 hours more light each day.
Explain your answer
Answer:
i hope it will help u bestie
Explanation:
Each year, many people look forward to the winter solstice, which usually falls on December 21 and is the shortest day of the year, because they know after that, there will be progressively more daylight each day.
If several species of carnivores are removed from an ecosystem, the most likely effect on the ecosystem will be an increase in stability among populations.
i think so since carnivours could lead to effects on ecosystem such as the number or behaviour of their herbivore prey
Compare and contrast how B cells and T cells respond to pathogens.
Answer:
B cells produce and secrete antibodies, activating the immune system to destroy the pathogens.
T cells can only recognize viral anti-gens outside the infected cells whereas B cells can recognize the surface antigens of bacteria and viruses.
Helper T cells stimulate B cells to make antibodies and help killer T cells develop.
Come up with your own " pre-flight" check before driving a car. Describe the importance of each step
Where in the female reproductive tract does fertilization of the egg occur?
When a plant is hypertonic, what is
happening in the plant cell, and what
will the plant look like?
A. The vacuole is full and the plant
rigid
B. The vacuole is not full and the
plant is wilted
C. The plant is at equilibrium
Answer:
B. The vacuole is not full and the plant is wilted
Explanation:
When a plant cell is placed in a hypertonic solution, the water inside the cells is drawn out by osmosis. The vacuoles decrease in size. The cytoplasm also shrinks away from the cellulose cell wall and plasmolysis occurs. This causes a lack of structure for the plant and causes it to wilt, or become flaccid.
the law of conservation of mass means that n an isolated system matter cannot be_______
Answer:
Matter cannot be created nor destoyed
What’s the difference between field farm and factory farm
Answer: Industrialized agriculture is highly concentrated and mechanized, relying on chemical inputs like fertilizers, pesticides and non-therapeutic antibiotics. However, sustainable agriculture, which uses methods that protect the environment, public health, human communities and animal welfare, is gaining traction.
Explanation:
Does RNA primary transcript always look the same? (have the same letter sequence?)
Question 17 (1 point) Spindle fibers are structures that radiate from centrioles and play an important role during mitosis. Pick the answer choice that describes their function,
A: Cytoplasm surrounds the spindles and provides protection.
B: Spindle fibers attach to the nuclear envelope and moves the nucleus around the cell.
C: Spindle fibers attach to chromosomes at the centromere and move them to the center of the cell.
D: Spindle fibers protect the cell from damage during DNA replication.
Answer:
The answer is D
Explanation: