COMPASSLearning
RegisterLogin

CBSE Class 12 · 2024 · BiomoleculesMultiple Choice

WhatsApp Email
The specific sequence in which amino acids are arranged in a protein is called its:
  1. (A)Primary structure✓ Correct
  2. (B)Secondary structure
  3. (C)Tertiary structure
  4. (D)Quaternary structure

Answer: (A)

Solution

The amino-acid sequence of the polypeptide chain is the protein's \textbf{primary structure} (2° = helix/sheet, 3° = folding, 4° = subunit assembly).
Correct option: (A).

CBSE Class 12 Board · 2024 · Single correct option

Practise more: all CBSE board PYQs on Biomolecules →

More board questions on Biomolecules

  1. Classify the following sugars into monosaccharides and disaccharides: galactose, glucose, lactose and maltose.
    CBSE 2024View solution →
  2. Case study — Vitamins: certain organic compounds required in small amounts in our diet whose deficiency causes specific diseases. Most vitamins cannot be synthesised in our body, but plants can synthesise almost all of them; gut bacteria produce some. The term 'vitamin' was coine …
    CBSE 2024View solution →
  3. Case study — Vitamins (same passage as above).
    OR (c) Why can't vitamin C be stored in our body? Name the disease caused by the deficiency of this vitamin.
    CBSE 2024View solution →
  4. Give the reaction of glucose with acetic anhydride. Which group's presence is confirmed by this reaction?
    CBSE 2023View solution →
  5. Give reasons for any three of the following observations:
    a) The pentaacetate of glucose does not react with hydroxylamine.
    b) Amino acids behave like salts.
    c) Water-soluble vitamins must be taken regularly in the diet.
    d) The two strands in DNA are complementary to each other.
    CBSE 2023View solution →
  6. Give a plausible explanation for each of the following:
    (a) Glucose doesn't give the 2,4-DNP test.
    (b) The two strands in DNA are not identical but are complementary.
    (c) Starch and cellulose both contain glucose units as monomer, yet they are structurally different.
    CBSE 2020View solution →