Q.
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
| (i) $\,\,$ | (ii) $\,\,$ | (iii)$\,\,$ | (iv) | |
|---|---|---|---|---|
| (a) | anabolic | corepressor | on | inactive |
| (b) | anabolic | inducer | off | active |
| (c) | catabolic | inducer | off | active |
| (d) | catabolic | corepressor | on | inactive |
Molecular Basis of Inheritance
Solution: