Question

Match List-I with List-II:
List-I:
1. Nucleoside
2. Nucleotide
3. Initiation codon
4. Termination codon
List-II:
A. UAA
B. AUG
C. Sugar + Base
D. Sugar + Base + Phosphate
Choose the correct answer from the options given below:

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

Hint:

Remember the memory aid: Nucleoside is "S" for Sugar + Base; Nucleotide has a "T" for Tri-component (Sugar + Base + Phosphate).

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
This matching question is based on the fundamental biochemical components of nucleic acids and key genetic codons.

Step 3: Detailed Explanation:
Let us match the entities of List-I with List-II:

• 1. Nucleoside: Composed of a nitrogenous base covalently linked to a pentose sugar. Thus, \(1 \rightarrow \text{C}\) (Sugar + Base).

• 2. Nucleotide: Composed of a nucleoside plus a phosphate group. Thus, \(2 \rightarrow \text{D}\) (Sugar + Base + Phosphate).

• 3. Initiation codon: AUG is the standard start codon that signals the beginning of translation. Thus, \(3 \rightarrow \text{B}\) (AUG).

• 4. Termination codon: UAA (along with UAG and UGA) is a stop codon that halts translation. Thus, \(4 \rightarrow \text{A}\) (UAA).
This corresponds to the combination: 1-C, 2-D, 3-B, 4-A.

Step 4: Final Answer
The correct option is 1-C, 2-D, 3-B, 4-A.