Match the following genes of the Lac operon with their respective products.

NEET-2019 [Molecular-Basis-of-Inheritance] [class-xii ]

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

Remark:

The lactose present in the growth medium of bacteria is transported to the cell by the action of:

NEET-2024 [Molecular-Basis-of-Inheritance] [class-xii ]

• Acetylase
• Beta-galactosidase
• Polymerase
• Permease
Correct Option: D  [ Permease ]

Remark: Explanation: NCERT Page No.101, (Topic-5.8.1 The Lac operon)

A transcription unit in DNA is defined primarily by the three regions in DNA and these are with respect to upstream and down stream end:

NEET-2024 [Molecular-Basis-of-Inheritance] [class-xii ]

• Structural gene, Transposons, Operator gene
• Repressor, Operator gene, Structural gene
• Promotor, Structural gene, Terminator
• Inducer, Repressor, Structural gene
Correct Option: C  [ Promotor, Structural gene, Terminator ]

Remark: Explanation: NCERT Page No.91, (Topic-5.5.1 Transcription Unit)