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Chemistry · 2026 · 2 marks
CBSE 2026 · Region 1 · Set 1 · Q20
Differentiate between the following: (i) Peptide linkage and Glycosidic linkage (ii) Essential amino acids and Non-essential amino acids
Differentiate between the following :
(i)
Peptide linkage and Glycosidic linkage
(ii)
Essential amino acids and Non-essential amino acids
Marking-scheme solution
(i)
It is an amide linkage formed between two amino acids through –CONH- /
an amide linkage formed between -COOH and -NH2 group whereas in
glycosidic linkage two or more monosaccharides are joined together by
an oxygen atom.
(ii)
Those which cannot be synthesised in the body and must be obtained
through diet known as essential amino acids. The amino acids, which can
be synthesised in the body, are known as nonessential amino acids.
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CBSE Class 12 Chemistry past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.