Question

Match the enzyme in column I with its function in column II and choose the correct option.

Column I	Column II
A. $\beta$-galactosidase	$1$. Joining of DNA fragments
B. Permease	$2$. Peptide bond formation
C. Ligase	$3$. Hydrolysis of lactose
D. Ribozyme	$4$. Increases permeability to $\beta$-galactosidase

• A. $2,1,4,3$
• B. $3,4,1,2$
• C. $2,4,1,3$
• D. $1,2,4,3$

Answer 1

Answer: (B)

$3,4,1,2$

β-galactosidase which is formed from gene lac Z brings about the hydrolysis of lactose, a disaccharide to form glucose and galactose. Permease is a protein which is formed from gene lacY enables transport of β-galactosidase into the cell by increasing its permeability. Ligase is an enzyme that facilitates the joining of DNA strands together by catalysing the formation of a phosphodiester bonds. Ribozymes are the RNA molecules which have the enzyme activity. Peptide bond formation during translation is affected by ribozyme.

Thus, the correct answer is option B.