Final answer:
Fat- and water-soluble vitamins are the organic molecules that cannot be produced by the body but are needed for enzymatic functions, with the correct response being option (b) vitamins. They are essential for health and must be obtained through diet.
Step-by-step explanation:
Certain molecules are required by but not produced by the body. Fat- and water-soluble vitamins are organic molecules that cannot be produced by the body but are required for many enzymatic functions. Therefore, the answer to the student's question is b) vitamins.
Vitamins come in two main categories: fat-soluble and water-soluble. These essential nutrients must be obtained through our diet, as they play critical roles in various bodily functions, including acting as coenzymes for enzymes. Vitamins are essential for our health, and their absence or insufficiency can lead to various health issues.
By contrast, minerals are inorganic essential nutrients that must be acquired from food, and certain amino acids, categorized as essential amino acids, must also be obtained through diet as the body is incapable of synthesizing them.
There are two categories of vitamins - fat-soluble and water-soluble. Fat-soluble vitamins include vitamins A, D, E, and K, while water-soluble vitamins include the B-vitamins and vitamin C.