WorksheetsTransposon
Total questions: 15
Worksheet time: 7mins
The transposable elements of bacteria are generally retrotransposons.
True
False
The IS elements can be identified by the presence of __________
Antibiotic resistance gene
Endonuclease cleavage site
50 bp inverted repeat
Integrase site
Direct repeats in the IS element are present __________
Within the transposon
Upstream the inverted repeat
Within the inverted repeat
Downstream the inverted repeat
The direct repeat within the IS element has a length of __________
20 bp
11-15 bp
5-11 bp
3-7 bp
The enzyme that catalyzes the transposition of an IS element is called __________
Transposase
Integrase
Transcriptase
Polymerase
Transposase restriction mechanism of IS element restricts the transposon and the target DNA in a combination of which of the following?
Blunt end cut for transposon and sticky end cut for target DNA
Blunt end cut for both transposon and target DNA
Sticky end cut for transposon and blunt end cut for target DNA
Sticky end cut for both transposon and target DNA
Which of the following functions is not performed by transposase?
Restriction of the IS element
Integration of the transposon
Formation of the RNA intermediate
Restriction of the host genome
The central block of the composite transposable element consists a gene for __________
Transposase
Antibiotic resistance
Integrase
Lactamase
Which of the following about the P-element is false?
25 bp inverted repeats
2907 bp long element
Encodes for transposase
DNA transposon
Hybrid dysgenesis is caused by which of the following transposable element?
Non-composite transposon
LINE
P-element
Ac-element
Retrotransposons transposes through the RNA intermediates.
True
False
P-strains of the Drosophila have active P-elements.
True
False
LTR-retrotransposons are abundantly found in __________
Bacteria
Virus
mammals
Yeast
LINE and SINE are examples of __________
LTR retrotransposon
Composite transposon
Non-LTR retrotransposon
Ac-element
Dysgenesis occurs in every cell of the Drosophila.
True
False
