Answer:When a cell needs to move a molecule many times, it uses vesicles. Vesicles are cellular organelles that are composed of a lipid bilayer. You can think of vesicles as cellular envelopes that are used to transport materials from one place to another. Vesicles also function in metabolism and enzyme storage as well.
Explanation:
Answer: The correct answer is-
D) a change in shape of the active sites of the enzyme.
Enzymes are primarily protein molecules that drive various chemical reactions ( by increasing the rate of reaction) within the body of living organisms.
Protease is a protein digesting enzyme that works on specific pH ( such as pepsin works on pH 2 within stomach, which is highly acidic) .
Shape of an enzyme determine its function as they have active sites ( which have unique shapes) that fit in the substrate and carry out the chemical reactions.
A major change in pH can alter the shape of the active sites of the enzyme, making it inactive.
Thus, option D) is the right answer.
Answer:
Kidney
Explanation:
Nephron is the basic unit of structure in the kidney