Please wait...
1800-212-7858 (Toll Free)
9:00am - 8:00pm IST all days


Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this toll free number


Mon to Sat - 11 AM to 8 PM

Can I know how DNA copying and errors in DNA occur?

Asked by Julie Humpton 27th January 2014, 10:31 PM
Answered by Expert
Hi Julie, Base pairs of DNA, i.e. Adenine (A) always pairs with Thymine (T) by a double bond. Guanine (G) always pairs with Cytosine (C) by a triple bond. Mispairings of a different nature such A (Adenine) with a G (Guanine) instead of T(Thymine) may cause errors in DNA copying and replication. It occurs due to mistakes made by enzymes involved in replication. Insertions or deletions of nucleotide bases also cause inaccuracy in DNA replication. The 3'- 5' exonuclease activity of DNA polymerase such as DNA polymerase III is responsible for the correction of mistakes made while DNA copying. This polymerase proof-reads the newly formed strand of DNA and immediately replaces the incorrect nucleotide with the correct one. Errors that occur while DNA copying are a source of variation.
Answered by Expert 28th January 2014, 4:50 PM
Rate this answer
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer /10

Your answer has been posted successfully!

Browse free questions and answers by Chapters

Latest Questions

ICSE X History and Civics
Asked by Aditya 11th December 2018, 4:20 AM
CBSE X Geography
Asked by guptaabhinav0809 10th December 2018, 11:53 PM
ICSE VI Mathematics
Asked by priyamickybasu 10th December 2018, 11:27 PM

Chat with us on WhatsApp