Question

Repressible operon system is usually found in $(i)$ pathways. The pathway's end product serves as a $(ii)$ to activate the repressor, turn off enzyme synthesis and prevent overproduction of the end product of the pathway. Genes for this operon are usually switched $(iii)$ and the repressor is synthesised in an $(iv)$ form.

	(i)	(ii)	(iii)	(iv)
(a)	anabolic	corepressor	on	inactive
(b)	anabolic	inducer	off	active
(c)	catabolic	inducer	off	active
(d)	catabolic	corepressor	on	inactive

• A. a
• B. b
• C. c
• D. d

Answer 1

Answer: (A)

Correct answer is (a) a