Explore topic-wise MCQs in Molecular Biology.

This section includes 11 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.

WHICH_OF_THE_FOLLOWING_IS_A_NON-COMPOSITE_TRANSPOSON??$

A. Tn5
B. Tn10
C. Tn3
D. Tn9
Answer» D. Tn9
2.

Hybrid dysgenesis is caused by which of the following transposable element?$

A. Non-composite transposon
B. LINE
C. P-element
D. Ac-element
Answer» D. Ac-element
3.

Which_of_the_following_about_the_P-element_is_false?$

A. 25 bp inverted repeats
B. 2907 bp long element
C. Encodes for transposase
D. DNA transposon
Answer» B. 2907 bp long element
4.

The central block of the composite transposable element consists a gene for _________?

A. Transposase
B. Antibiotic resistance
C. Integrase
D. Lactamase
Answer» C. Integrase
5.

Which of the following functions is not performed by transposase?

A. Restriction of the IS element
B. Integration of the transposon
C. Formation of the RNA intermediate
D. Restriction of the host genome
Answer» D. Restriction of the host genome
6.

Transposase restriction mechanism of IS element restricts the transposon and the target DNA in a combination of which of the following?

A. Blunt end cut for transposon and sticky end cut for target DNA
B. Blunt end cut for both transposon and target DNA
C. Sticky end cut for transposon and blunt end cut for target DNA
D. Sticky end cut for both transposon and target DNA
Answer» B. Blunt end cut for both transposon and target DNA
7.

The enzyme that catalyzes the transposition of an IS element is called __________

A. Transposase
B. Integrase
C. Transcriptase
D. Polymerase
Answer» B. Integrase
8.

The direct repeat within the IS element has a length of __________

A. 20 bp
B. 11-15 bp
C. 5-11 bp
D. 3-7 bp
Answer» D. 3-7 bp
9.

Direct repeats in the IS element are present __________

A. Within the transposon
B. Upstream the inverted repeat
C. Within the inverted repeat
D. Downstream the inverted repeat
Answer» D. Downstream the inverted repeat
10.

The IS elements can be identified by the presence of __________

A. Antibiotic resistance gene
B. Endonuclease cleavage site
C. 50 bp inverted repeat
D. Integrase site
Answer» D. Integrase site
11.

The transposable elements of bacteria are generally retrotransposons.

A. True
B. False
Answer» C.