Answer:
It needs protein channels known as Aquaporins.
Explanation:
These Aquaporins, also referred to as water channels, are membrane proteins which serve as passageways for water. Aquaporins facilitate the transportation of water and other neutral molecules across cell membranes.
The skin plays a role in the production of vitamin D because when dehydrocholesterol reaches the skin by means of the blood and is exposed to ultraviolet light from the sun, it changes to vitamin D in an inactive form.
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Answer:
A. They are synthesized. is the correct answer.
Explanation:
protein synthesis is the method of producing proteins within the cell
In the endoplasmic reticulum on the surface of a rough endoplasmic reticulum, proteins are synthesized.
The rough endoplasmic reticulum is embraced with ribosomes on its external surface and it is involved in protein synthesis.
The protein enters the rough endoplasmic reticulum, by a pore and protein is folded in the rough endoplasmic reticulum, and after that, it is sent to the Golgi apparatus.