Which of the following statements about metabolism is true?
A) It includes both catabolism and anabolism
B) It occurs only in the presence of sunlight
C) It is a process that occurs only in animal cells
D) It focuses only on the synthesis of molecules
E) It does not involve chemical reactions
IMAT 2026 · Question 23
Q23 - ATP and bioenergetics
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The correct answer is A) It includes both catabolism and anabolism.
Metabolism is the sum of all chemical reactions in a cell: catabolism breaks molecules down and releases energy, while anabolism builds molecules and uses energy.
A) Correct: Metabolism is catabolism plus anabolism.
B) Incorrect: Only photosynthesis needs light. Animals, fungi and plants at night still carry out metabolism.
C) Incorrect: Metabolism occurs in every living cell: bacteria, plants, fungi and animals.
D) Incorrect: That describes anabolism only. Metabolism also includes breaking molecules down.
E) Incorrect: Metabolism is, by definition, a set of chemical reactions.
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