In prokaryotes, a hypothesis was given in 1961 to explain the protein synthesis regulation. This hypothesis was given by F Jacob and J Monod and for this awarded Nobel Prize in 1965 , the hypothesis was known by the name of Operon Model. The operator gene is the segment of DNA, which exercise a control over transcriptions. In the absence of lactose, the repressor binds with the operator gene.
Select the two statements out of the four (1-4) given below about lac operon. (1) Glucose or galactose may bind with the repressor and inactivate it…
NEET UG 2010 — Zoology Molecular Basis of Inheritance
2010mcqmedium
Select the two statements out of the four (1−4) given below about lac operon. (1) Glucose or galactose may bind with the repressor and inactivate it (2) In the absence of lactose, the repressor binds with the operator region (3) The z-gene codes for permease (4) This was elucidated by Francois Jacob and Jacques Monod The correct statements are
Official previous-year question
Held on 30 Apr 2010 · Verified 9 Jul 2026.
Options
- A
(2) and (3)
- B
(1) and (3)
- C
(2) and (4)
- D
(1) and (2)
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