Answer:
The correct answer is option c, that is, alternative splicing.
Explanation:
When a solitary pre-mRNA molecule is processed in two or more than two ways to produce two or more RNA it is known as alternative splicing. This distinct RNA post-translation produces different products of genes. It takes place when one 5 prime splice site of the intron is associated with more than one 3 prime splice sites and is possibly mediated by the structural conformation of RNA and some of the splicing regulators, like SR protein.
The alternative splicing takes place distinctly in different cell types and is also monitored by the cell type-specific factor. The remaining of the options are not correct as these options are related to the process control mechanism.
A.
The moon is responsible for many of the tidal forces on Earth.
The muscles that contract (during cold or fright), the slanted hair follicle is pulled upright, dimpling the skin surface with goosebumps are called arrector pili muscle.
The arrector pili muscle are tiny muscle that attaches to the base of the hair follicle at one end and to the dermal tissue on the other end. When the body feels cold or fright the body generate heat and the arrector pili muscle contract all at once, that causes goosebumps on the skin.
The arrector pili muscle acts as the thermoregulator. Straight stand hair increases air trapping, so that the heat loss from the body decreases. The arrector pili muscle are mediated by the sympathetic nervous system.
To learn more about sympathetic nervous system here
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