The normal function for restriction endonuclease is to :

MCQ

A
Excise introns from hn $\text{RNA}$
B
Polymerize nucleotides to form $\text{RNA}$
✓
Cleave and modify $\text{DNA}$
D
Remove primer from Okazaki fragments

✓

Answer

Correct option: C.

Cleave and modify $\text{DNA}$

Restriction endonucleases recognise specific sequences in the $\text{DNA}$ and digest the $\text{DNA}$ into fragments by destroying the phosphodiester bonds.
Hence, the restriction endonucleases are synthesised by bacteria as part of their defense mechanism which help in the cleavage of the $\text{DNA}$ segments which are identified as foreign.
The restriction sites are very short sequences and can be present in the genome of the bacteria.
Its own $\text{DNA}$is protected from destruction by adding methyl groups to it.
Certain bases in the strand of $\text{DNA}$ of the bacteria are modified for getting protected against the activity of the enzymes.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "MCQ" from Biotechnology: Principles and Processes→Biotechnology: Principles and Processes — all question types→BIOLOGY STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Biotechnology: Principles and Processes — BIOLOGY STD 12 Science — Question

Answer

Need a full question paper?

Explore more

Similar questions