Multiple Choice
Which of the following statements is true about complete protein sources?
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4. Biomolecules
Introduction to Biomolecules
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Which of the following does NOT describe a vitamin?
A
An organic compound required in small amounts for normal metabolism
B
A substance that often functions as a coenzyme or part of a coenzyme
C
A molecule that serves as a primary energy source for cells
D
A nutrient that must generally be obtained from the diet
Verified step by step guidance1
Step 1: Understand the definition of a vitamin. Vitamins are organic compounds required in small amounts for normal metabolism and are essential for various biochemical processes in the body.
Step 2: Recognize that vitamins often function as coenzymes or parts of coenzymes. Coenzymes are molecules that assist enzymes in catalyzing biochemical reactions.
Step 3: Identify that vitamins are not a primary energy source for cells. Instead, macronutrients like carbohydrates, fats, and proteins serve as the primary energy sources.
Step 4: Note that vitamins are nutrients that must generally be obtained from the diet because the body either cannot synthesize them or produces them in insufficient quantities.
Step 5: Compare the options provided and eliminate the ones that align with the characteristics of vitamins. The correct answer is the one that does NOT describe a vitamin, which is 'A molecule that serves as a primary energy source for cells.'
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