Transposon

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