Question

Match the column.
$\begin{array}{cc}\text{Column-I}& \text{Column-II}\\ \text{P. 3`end tRNA}& \text{i. beta - galactosidase}\\ \text{Q. Lac operon}& \text{ii. DNA ligase}\\ \text{R. Genetic code}& \text{iii. Amino acid acceptor arm}\\ \text{S. Okazaki fragments}& \text{iv. Unambiguous}\end{array}$

• A. P - iv, Q - ii, R - iii, S - i
• B. P - iii, Q - i, R - iv, S - ii
• C. P - i, Q - ii, R - iii, S - iv
• D. P - iii, Q - iv, R - i, S - ii

Answer 1

The correct option is B P - iii, Q - i, R - iv, S - ii

The tRNA molecule has a clover-leaf-like secondary structure. The amino acid acceptor arm is located at the 3' end of the tRNA molecule. A specific tRNA binds to a specific amino acid through its acceptor stem.

Ꞵ - galactosidase is one of the enzyme produced in lac operon by a structural gene z and help in digestion of lactose.

The genetic code is unambiguous which means each codon specifies one amino acid only.

The process of DNA replication leads to the formation of a continuous i.e.leading strand, and a discontinuous i.e.lagging strand. The fragments of the discontinuous strand are called Okazaki fragments which are joined by DNA ligase, to form a single strand.
Hence, the correct match is-
$\begin{array}{cc}\text{Column-I}& \text{Column-II}\\ \text{P. 3`end tRNA}& \text{i. Amino acid acceptor arm}\\ \text{Q. Lac operon}& \text{ii. ꞵ-Galactosidase}\\ \text{R. Genetic code}& \text{iii. Unambiguous}\\ \text{S. Okazaki fragments}& \text{iv. DNA ligase}\end{array}$