Explore topic-wise MCQs in Molecular Biology.

This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Molecular Biology knowledge and support exam preparation. Choose a topic below to get started.

1.

Any mutation in the sequence of the acceptor stem does not pose a threat to the amino acid incorporation.

A. True
B. False
Answer» C.
Discussion
2.

Which of the following parts of the mRNA determines the specificity of the amino acid attached?

A. Acceptor stem
B. Variable loop
C. ΨU loop
D. D loop
Answer» B. Variable loop
Discussion
3.

Which of the following pair is an example for using only one type of tRNA synthetase in bacteria?

A. Glutamine and cystine
B. Glutamic acid and asparagine
C. Cystine and Valine
D. Glutamine and glutamic acid
Answer» E.
Discussion
4.

For the charging of tRNA molecules, the acyl linkage occurs between the carboxyl group of the amino acid to the ____________

A. 2’ hydroxyl group of A
B. 3’ hydroxyl group of T
C. 2’ hydroxyl group of G
D. 3’ hydroxyl group of C
Answer» B. 3’ hydroxyl group of T
Discussion
5.

Which of the following statements are true about aminoacyl tRNA?

A. i and ii
B. iii and iv
C. i, ii and iii
D. i, ii, iii and ivView Answer
Answer» E.
Discussion
6.

WHICH_OF_THE_FOLLOWING_PAIR_IS_AN_EXAMPLE_FOR_USING_ONLY_ONE_TYPE_OF_TRNA_SYNTHETASE_IN_BACTERIA??$

A. Glutamine and cystine
B. Glutamic acid and asparagine
C. Cystine and Valine
D. Glutamine and glutamic acid
Answer» E.
Discussion
7.

Any mutation in the sequence of the acceptor stem does not pose a threat to the amino acid incorporation.$

A. True
B. False
Answer» C.
Discussion
8.

Which of the following parts of the mRNA determines the specificity of the amino acid attached?$

A. Acceptor stem
B. Variable loop
C. ΨU loop
D. D loop
Answer» B. Variable loop
Discussion
9.

The set of tRNA determinants that enable synthetases to discriminate among tRNAs are called ___________

A. Primary genetic code
B. First genetic code
C. Secondary genetic code
D. Second genetic code
Answer» E.
Discussion
10.

For the addition of amino acids to the tRNA molecules the tRNA synthetases rely on the guidance provided by the anticodon sequence.

A. True
B. False
Answer» C.
Discussion
11.

The quaternary structure of which of the aminoacyl tRNA synthetase is the odd one among the following?

A. Glycine
B. Alanine
C. Proline
D. Serine
Answer» B. Alanine
Discussion
12.

How many tRNA synthetases are found in a cell?

A. 64
B. 32
C. 10
D. 20
Answer» E.
Discussion
13.

How many types of tRNA synthetases are found?

A. 4
B. 3
C. 2
D. 1
Answer» D. 1
Discussion
14.

The principle driving force for adenylation reaction during the formation of the aminoacyl tRNA is carried out by ___________

A. Isomerase
B. Synthetase
C. Pyrophosphatase
D. Phosphokinase
Answer» D. Phosphokinase
Discussion
15.

The joining of the amino acid to the tRNA requires ___________ steps.

A. 1
B. 2
C. 3
D. 4
Answer» C. 3
Discussion
16.

The formation of the acyl linkage is significant for protein synthesis even though it is a high energy bond.

A. True
B. False
Answer» B. False
Discussion
17.

For the charging of tRNA molecules the acyl linkage occurs between the carboxyl group of the amino acid to the ____________

A. 2’ hydroxyl group of A
B. 3’ hydroxyl group of T
C. 2’ hydroxyl group of G
D. 3’ hydroxyl group of C
Answer» B. 3‚Äö√Ñ√∂‚àö√ë‚àö¬• hydroxyl group of T
Discussion