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Chemistry · 2025 · 3 marks
CBSE 2025 · Region 1 · Set 1 · Q28
(a) What is the difference between native protein and denatured protein? ( 1 + 1 + 1 = 3 ) (b) Which one of the following is a disaccharide? Glucose,…
(a)
What is the difference between native protein and denatured protein ? $\displaystyle (\mathbf{1}+\mathbf{1}+\mathbf{1}=\mathbf{3})$
(b)
Which one of the following is a disaccharide ? Glucose, Lactose, Amylose, Fructose
(c)
Which vitamin is responsible for the coagulation of blood ?
Marking-scheme solution
(a)
Native protein
Denatured protein
Three-dimensional structure is intact.
Biologically active
Three-dimensional structure is destroyed.
Biologically inactive
(b)
Lactose
(c)
Vitamin K
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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.