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Biomolecules: Class-XI


Previous Year Questions (PYQs)

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NEET PYQs on Biomolecules: Class-XI


Identify the incorrect pair.

NEET-2021 [Biomolecules] [class-xi ]

  • Alkaloids - Codeine
  • Toxin - Abrin
  • Lectins - Concanavalin A
  • Drugs - Ricin
  • Correct Option: D  [ Drugs - Ricin ]

    Remark:

Following are the statements with reference to 'lipids'.
A. Lipids having only single bonds are called unsaturated fatty acids.
B. Lecithin is a phospholipid.
C. Trihydroxy propane is glycerol.
D. Palmitic acid has 20 carbon atoms including carboxyl carbon.
E. Arachidonic acid has 16 carbon atoms.
Choose the correct answer from the options given below.

NEET-2021 [Biomolecules] [class-xi ]

  • A and B only
  • C and D only
  • B and C only
  • B and E only
  • Correct Option: C  [ B and C only ]

    Remark:

Which one of the following is the most abundant protein in the animals?

NEET-(Sept)2020 [Biomolecules] [class-xi ]

  • Haemoglobin
  • Collagen
  • Lectin
  • Insulin
  • Correct Option: B  [ Collagen ]

    Remark:

Identify the substances having glycosidic bond and peptide bond, respectively in their structure:

NEET-(Sept)2020 [Biomolecules] [class-xi ]

  • Chitin, cholesterol
  • Glycerol, trypsin
  • Cellulose, lecithin
  • Inulin, insulin
  • Correct Option: D  [ Inulin, insulin ]

    Remark:

Identify the basic amino acid from the following.

NEET-(Sept)2020 [Biomolecules] [class-xi ]

  • Tyrosine
  • Glutamic Acid
  • Lysine
  • Valine
  • Correct Option: C  [ Lysine ]

    Remark:

Match the following:

(A)Inhibitor of catalytic activity (I)Ricin
(B)Possess peptide bonds (II)Malonate
(C)Cell wall material in fungi (III)Chitin
(D)Secondary metabolite (IV)Collagen
Choose the correct option from the following:

NEET-(Sept)2020 [Biomolecules] [class-xi ]

  • (A)-(II), (B)-(IV), (C)-(III), (D)-(I)
  • (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
  • (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
  • (A)-(II), (B)-(III), (C)-(I), (D)-(IV)
  • Correct Option: A  [ (A)-(II), (B)-(IV), (C)-(III), (D)-(I) ]

    Remark:

Match the following:

List-I List-II
(A)Aquaporin (I)Amide
(B)Asparagine (II)Polysaccharide
(C)Abscisic acid (III)Polypeptide
(D)Chitin (IV)Carotenoids
Select the correct option:

NEET-(Oct)2020 [Biomolecules] [class-xi ]

  • (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
  • (A)-(II), (B)-(III), (C)-(IV), (D)-(I)
  • (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
  • (A)-(III), (B)-(I), (C)-(II), (D)-(IV)
  • Correct Option: A  [ (A)-(III), (B)-(I), (C)-(IV), (D)-(II) ]

    Remark:

Floridean starch has structure similar to:

NEET-(Sept)2020 [Biomolecules] [class-xi ]

  • Starch and cellulose
  • Amylopectin and glycogen
  • Mannitol and algin
  • Laminarin and cellulose
  • Correct Option: B  [ Amylopectin and glycogen ]

    Remark:

DNA precipitation out of a mixture of biomolecules can be achieved by treatment with:

NEET-2019 [Biomolecules] [class-xi ]

  • Chilled ethanol
  • Isopropanol
  • Methanol at room temperature
  • Chilled chloroform
  • Correct Option: A  [ Chilled ethanol ]

    Remark:

Which of the following is a commercial blood cholesterol lowering agent?

NEET-2019 [Biomolecules] [class-xi ]

  • statin
  • Lipases
  • Streptokinase
  • Cyclosporin A
  • Correct Option: A  [ statin ]

    Remark: