Ribozymes: Enzymes Made of Nucleic Acids — NEET Biology
✅ Asked in NEET 2024Which of the following statements is incorrect about enzymes?
Which of the following statements is incorrect about enzymes?
Match List-I with List-II:List-I A. Ribozyme B. Lecithin C. Glut-4 D. Vitamins List-II I. Glucose transport II. Non-proteinaceous enzyme III. Lipid IV. Coenzyme Choose the correct answer from the options given below:
A non-proteinaceous enzyme is (NEET 2016 Phase 2)
Answer & NCERT explanation
Correct answer: C — All enzymes are proteinaceous in nature
The statement 'all enzymes are proteinaceous in nature' is incorrect because ribozymes are RNA-based enzymes that are non-proteinaceous. Most enzymes are proteins, but ribozymes like ribosomal RNA and self-splicing introns are made of RNA, not proteins.
Read more NCERT concept on the PYQ
Almost all enzymes are proteins. There are some nucleic acids that behave like enzymes. These are called ribozymes. One can depict an enzyme by a line diagram. An enzyme like any protein has a primary structure, i.e., amino acid sequence of the protein. An enzyme like any protein has the secondary and the tertiary structure. When you look at a tertiary structure
NTA tests whether students know that enzymes aren't always proteins—some nucleic acids like RNA also function as enzymes (ribozymes). Students commonly assume ALL enzymes are proteins, missing this important exception. Ribozymes catalyze reactions like peptide bond formation in ribosomes and self-splicing in some RNA molecules. Remember: ribozymes have the same enzyme properties (specificity, catalytic activity, unchanged after reaction) but are made of RNA/DNA, not protein. This concept appears repeatedly because it challenges the protein-centric view and tests deeper understanding of enzyme nature beyond typical textbook definitions.
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Through deep analysis of NEET and NTA, 88 of 90 questions from the NEET 2026 paper were matched straight from the MedicNEET Biology question bank.
88/90MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.