Consider the following statements:
(A) Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group.
(B) A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme.
Select the correct option.

NEET-2019 [Biomolecules] [class-xi ]

• Both (A) and (B) are true.
• (A) is true and (B) is false.
• Both (A) and (B) are false.
• (A) is false and (B) is true.
Correct Option: B  [ (A) is true and (B) is false. ]

Remark:

Inhibition of Succinic dehydrogenase enzyme by malonate is a classical example of:

NEET-2024 [Biomolecules] [class-xi ]

• Enzyme activation
• Competitive inhibition
• Cofactor inhibition
• Feedback inhibition
Correct Option: B  [ Competitive inhibition ]

Remark:

Lecithin, a small molecular weight organic compound found in living tissues, is an example of:

NEET-2024 [Biomolecules] [class-xi ]

• Phospholipids
• Amino acids
• Carbohydrates
• Glycerides
Correct Option: A  [ Phospholipids ]

Remark:

The cofactor of the enzyme carboxypeptidase is:

NEET-2024 [Biomolecules] [class-xi ]

• Niacin
• Zinc
• Haem
• Flavin
Correct Option: B  [ Zinc ]

Remark: Explanation: NCERT Page No.159,(Topic-9.12.6 Co-factors)

Match List-I with List-II.

NEET-2024 [Biomolecules] [class-xi ]

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

Remark:

Match List I with List II:

NEET-2024 [Biomolecules] [class-xi ]

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

Remark:

Regarding catalytic cycle of an enzyme action, selecte the correct sequential steps:

A. Substrate enzyme complex formation.
B. Free enzyme ready to bind with another substrate.
C. Release fo products.
D. Chemical bonds of the substrate broken.
E. Substrate bindig to active site.

Choose the correct answer from the options given below:

NEET-2024 [Biomolecules] [class-xi ]

• A, E, B, D, C
• E, A, D, C, B
• E, D, C, B, A
• B, A, C, D, E
Correct Option: A  [ A, E, B, D, C ]

Remark: