Answer:
The correct answer is c the mutant will show decreased levels of gene expression.
Explanation:
Histone acetyl transferase is an enzyme that helps in the transfer of acetyl group to the epsilon -NH2 group of lysine reside of histone proteins that surrounds the DNA molecule of chromosome.
This results to make the target DNA more assecible for transcription mediated by RNA polymerase resulting the gene expression.
On the other hand the mutant in which histones are not acetylated,transcription rate decreases as the non acetylated DNA is less assecible to RNA polymerase.
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➷ Temperature would speed up the fermentation process until a certain point. At approximately 55 degrees Celsius, the yogurt cultures would be destroyed.
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If this oil<span> mixes with dead </span>skin<span> cells and blocks a pore, it </span>can<span> produce a pimple.</span>Sebaceous glands<span> produce </span>oil<span> called sebum that moves up hair follicles to the surface of the </span>skin<span>, where the </span>oil<span> lubricates </span>skin<span> and hair. The </span>gland<span> may keep producing </span>oil<span> when the opening is blocked, leading to a pimple.</span>
The dominant shape of a pea pod is Smooth.
To know this we simply need to see the shapes of the majority of pea pod around us and leave the rest to natural selection. The majority of them had smooth shapes.
This indicates that the Genetic that determine the smooth shape of pea pod is Dominant and exist in larger amount.
Answer:
Venous return (VR) is the flow of blood back to the heart.
Venous return to the right atrium is the most important factor determining cardiac output, provided both ventricles and the pulmonary circulation are normal.
Explanation:
Venous return refers to the flow of blood from the periphery back to the right atrium, and except for periods of a few seconds, it is equal to cardiac output.
Venous return is facilitated by a number of factors, including inspiration, increased total blood volume, increased venomotor tone, the cardiac suction effect, the presence of venous valves and the skeletal muscle pump.
Contraction of the skeletal muscles surrounding veins increases the pressure within the veins, pushing open the proximal valve and forcing blood toward the heart. For example, when calf muscles contract during exercise, blood is forced toward the heart, thus increasing venous return.
Learn more about venous force here:-
brainly.com/question/11621104
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