Question

Match the structural genes of the Lac Operon in Column I with their functions in Column II. 

Column I		Column II
(A)	lacZ	(I)	Permease
(B)	lacY	(II)	Transacetylase
(C)	lacA	(III)	\(\beta\)-galactosidase

Choose the correct answer from the options given below:

• A. A-I, B-II, C-III
• B. A-III, B-I, C-II
• C. A-II, B-III, C-I
• D. A-III, B-II, C-I

Hint:

Lac Operon Gene Functions: \[ \boxed{lacZ \rightarrow \beta\text{-galactosidase}} \] \[ \boxed{lacY \rightarrow \text{Permease}} \] \[ \boxed{lacA \rightarrow \text{Transacetylase}} \] A very common CUET/NEET molecular genetics question.

Answer 1

The Correct Option is B

Step 1: Recall the structural genes of the Lac Operon. The Lac Operon contains three structural genes: \[ lacZ,\; lacY,\; lacA \]

Step 2: Recall their functions. \[ lacZ \rightarrow \beta\text{-galactosidase} \] \[ lacY \rightarrow \text{Permease} \] \[ lacA \rightarrow \text{Transacetylase} \]

Step 3: Match the columns. \[ A \rightarrow III \] \[ B \rightarrow I \] \[ C \rightarrow II \] Thus, \[ \boxed{A\!-\!III,\;B\!-\!I,\;C\!-\!II} \] Therefore, \[ \boxed{\text{(B)}} \] is the correct answer.