Answer:
The correct answer is A.
Explanation:
Diffusion is the net movement of a substance from a region of higher concentration to a region of lower concentration. The difference in concentration between two environments creates a concentration gradient which is what drives diffusion. Therefore, this movement does not require aid such as extra energy molecules for active transport or integral membrane proteins for directed movement, hence the answer is not B nor C. If the cell is in equilibrium with its environment, it means that the concentration of substances inside the cell is equal to the concentration outside the cell, and any movement that takes place will be random movement of substances across the plasma memberane. Movement in the cell will not cease as the cell is still active. Therefore, the answer cannot be D either.
The enzyme pepsin acts on proteins to produce peptides which are later broken into amino acids in the small intestine
<h3><u>Answer;</u></h3>
B. They protect against oxidative damage from excessive light energy
<h3>Explanation;</h3>
- Some carotenoids seem to be function as photoprotectors.
- These compounds absorb and dissipate excessive light energy that would otherwise damage chlorophyll or interact with oxygen, forming reactive oxidative molecules that are dangerous to the cell.
The answer is D, ADP gains a phosphate and that is used to convert to ATP with a product of ATP and water
