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Chemistry · 2025 · 3 marks
CBSE 2025 · Region 1 · Set 3 · Q28
Define the following terms: (a) Native protein (b) Nucleotide (c) Essential amino acid
Define the following terms :
(a)
Native protein
(b)
Nucleotide
(c)
Essential amino acid
Marking-scheme solution
(a)
Protein found in a biological system with a unique three dimensional structure and biological
activity.
(b)
Nitrogenous base + Pentose Sugar + Phosphate / a unit formed when a nucleoside is linked
with phosphate.
(c)
Those acids which cannot be synthesized in the body and must be obtained through diet.
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CBSE Class 12 Chemistry past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.