Question:
Which one has no protein component?
Which one has no protein component?
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Recall which catalytic molecule is made of RNA, not protein.
Updated On: Jul 4, 2026
- Cytochrome c oxidase
- Ribozyme
- Superoxide dismutase
- DNA methyl transferase
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The Correct Option is B
Solution and Explanation
Step 1: Cytochrome c oxidase, superoxide dismutase and DNA methyl transferase are all classic enzymes built from polypeptide chains, so each of them has a protein component as their catalytic backbone.
Step 2: A ribozyme, by contrast, is an RNA molecule that can catalyze a biochemical reaction entirely on its own, without needing any protein subunit for its catalytic activity.
Step 3: Since ribozymes are RNA based catalysts, they are the one option here with no protein component at all.
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