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NEET UG BIOLOGY MCQ: MOLECULAR BASIS OF INHERITANCE
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Select the two correct statements out of the four (a to d) given below about lac operon:-
(a) Allolactose may bind with repressor and inactivated it.
(b) In the absence of lactose the repressor binds with the operator regions
(c) The z-gene codes for permease
(d) The i-gene codes for activator protein
The correct statements are:-
(a) Allolactose may bind with repressor and inactivated it.
(b) In the absence of lactose the repressor binds with the operator regions
(c) The z-gene codes for permease
(d) The i-gene codes for activator protein
The correct statements are:-
View answer and explanation
Correct option: B
(a) & (b)
Option B ((a) & (b)) is correct because allolactose binds to and inactivates the repressor, and in the absence of lactose, the repressor binds to the operator region.
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Reason: Member of kingdom Monera are
efficient in regulating gene expression. Which of the following is not true for DNA polymerase? Dystrophin gene consists of Read the following four statements (i-iv).
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show high adaptability to the changing
environment.
Reason: Member of kingdom Monera are
efficient in regulating gene expression. Which of the following is not true for DNA polymerase? Dystrophin gene consists of Read the following four statements (i-iv).
i. In transcription, adenosine pairs with uracil.
ii. Regulation of lac operon by repressor is referred to as positive regulation
iii. The human genome has approximately 30,000 genes
iv. Haemophilia is a sex-linked recessive disease
How many of the above statements are correct? Reactive group of RNA is?