Which statement about enzyme is incorrect_________________?
Correct answer: C. All enzymes are fibrous Proteins.
- A. Some of them consist solely of protein with no non protein part.
- B. They catalyze a chemical reaction without being utilized.
- C. All enzymes are fibrous Proteins.
- D. They without their cofactor are called apoenzyme.
Explanation
Enzymes are generally globular proteins, not fibrous proteins, because their folded three-dimensional structure creates the active site. A student may choose d because apoenzymes lack their cofactors, but that statement is correct; the apoenzyme becomes active when combined with its cofactor.
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About Characteristics of Enzymes
Enzymes are globular biological catalysts that lower activation energy without being consumed, usually showing specificity for particular substrates. Questions cover active sites, enzyme substrate complexes, the lock and key and induced fit models, intracellular and extracellular action, and the effects of denaturation, while distinguishing enzymes from non biological catalysts.
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