CBSE Class 12 Chemistry sample paper 2026-27: question 7
From the official CBSE sample question paper for 2026-27, section A, question 7, for 1 mark. Try it first; the hints and our step-by-step solution are below.
Q7 · 1 mark · MCQBiomolecules
The amino acid , can be synthesised within our body. Which of the following is true about this amino acid?
is:
- (A)an acidic and non-essential amino acid.
- (B)a neutral and non- essential amino acid.
- (C)an acidic and essential amino acid
- (D)a neutral and essential amino acid
Source: official sample paper from cbseacademic.nic.in (PDF). See it in the full Sample paper 2026-27.
Hints
Open one hint at a time and try again before the next.
Hint 1
Count the –COOH and –NH₂ groups.
Hint 2
Recall what 'essential' means for an amino acid.
Step-by-step solution
Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.
The molecule (glutamic acid) has two –COOH groups and one –NH₂ group, so it is an acidic amino acid.
- 1 mark
Because the body can synthesise it, it is non-essential. So the answer is A.
Answer: Option (A)
Where the marks are
- Acidic (2 COOH, 1 NH₂) and non-essential (made in the body) (1 mark)
Revise the chapter
- Chapter: Biomolecules (notes, formulas, where marks are lost and every past question)
- Topic: Proteins: Amino Acids, Peptide Bond and Structure
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