THE MOLECULAR BASIS OF INHERITANCE
THE HUMAN GENOME
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
DNA has a ____ charge.
|
|
positive
|
|
|
opposite
|
|
|
negative
|
|
|
attractive
|
Explanation:
Detailed explanation-1: -DNA is negatively charged because of the presence of phosphate groups in nucleotides. The phosphate backbone of DNA is negatively charged, which is due to the presence of bonds created between the phosphorus and oxygen atoms.
Detailed explanation-2: -DNA is negatively charged, therefore, when an electric current is applied to the gel, DNA will migrate towards the positively charged electrode. Shorter strands of DNA move more quickly through the gel than longer strands resulting in the fragments being arranged in order of size.
There is 1 question to complete.