

MCQOPTIONS
Saved Bookmarks
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. | |