A)
A
B
X
Y
Z
L
Repressor
Inducer
\[\beta \]-Galactosidase
Permease
Transacetylase
X
B)
Repressor
Inducer
Permease
\[\beta \]- Galactosidase
Transacetylase
Y
C)
Inducer
Repressor
\[\beta \]- Galactosidase
Permease
Transacetylase
Z
D)
Inducer
Repressor
\[\beta \]- Galactosidase
Transacetylase
Permease
B
Correct Answer: A
Solution :
[a] In the given figure of lac operon model (proposed by Jacob and Monad), the labels A, B, X, Y and Z are respectively represser, inducer, \[\beta \] - galactosidase (z), permease (y), transacetylase [a], z, y and a are three structural genes which produces three enzymes for the degradation of lactose to glucose and galactose. Label X (P- galactosidase) is primarily responsible for the hydrolysis of disaccharide lactose into galactose and glucose.You need to login to perform this action.
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