Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • The nuclease enzyme which begins its attack from a free end of a polynucleotide is:  Option: 1 Exonuclease<div class='qn

The nuclease enzyme which begins its attack from a free end of a polynucleotide is:

 

Option: 1

Exonuclease


Option: 2

Kinase


Option: 3

Endonuclease


Option: 4

Polymerase


Answers (1)

best_answer

Exonuclease activity means cleavage of nucleotides only at the end while endonuclease breaks DNA strand at an internal position. DNA polymerase I has 3' - 5' exonuclease activity which removes any nucleotide which mispair during elongation of growing strand. A small segment of DNA polymerase I also shows 5' - 3' exonuclease activity which removes the DNA segment which comes as an obstruction in the way of growing DNA strand. Polymerase catalyzes the elongation of a polymeric molecule. Endonucleases are very specific and cut DNA at very specific nucleotide sequences. These are called restriction enzymes. Kinase is an enzyme that can transfer a phosphate group.

Hence, the correct answer is option 1. 

Posted by

Kuldeep Maurya

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks

Similar Questions

Trending Articles/News

anam-khan

'PM Modi personally supervising the situation': Centre tells SC in NEET case
anam-khan

NEET Paper Leak Row: NTA informs SC of security overhaul, institutional reforms
anam-khan

Re-NEET 2026 City Intimation Slip LIVE: NTA MBBS admit card soon; direct link, login details, exam date

Latest Question