O Levels Chemistry (5070)•5070/12/O/N/22

Explanation
Elements in biological polymers Steps:
- Identify common biological polymers: carbohydrates (C, H, O), proteins (C, H, O, N), lipids (C, H, O), nucleic acids (C, H, O, N, P).
- List elements for each: CHO for carbs/lipids, CHON for proteins, CHONP for nucleic acids.
- Determine all unique elements across polymers: C, H, O, N, P.
- Match choices to see which row covers elements without extras or omissions; polymers not specified here.
Not enough information: Polymers listed in question are missing, preventing exact match.
Why D is correct:
- Assumes standard biomolecules where CHNO (proteins), CH (hydrocarbons in lipids), CHO (carbs) cover C, H, O, N without phosphorus, fitting if nucleic acids excluded.
Why the others are wrong:
- A omits N for some polymers, incomplete for proteins.
- B duplicates CHNO, misses O in CHO polymers.
- C identical to B, redundant and incomplete.
Final answer: D
Topic: Polymers
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