Answer:
Correct choice is A) II<IV<III<I
Melting point of a DNA strand is temperature at which 50% of DNA becomes single stranded by breaking of hydrogen bond.
It depends on length of strand and number of hydrogen bonds.
Guanine - Cytosine pair has got 3 hydrogen bonds
Adenine- Thymine bond has got only 2 hydrogen bonds.
In this question length of DNAs are similar with16 base pairs.
DNA labelled 1 has got 16 (all) 3 hydrogen bond pairs.
DNA 2 has got such 4 pairs
DNA labelled 3 has got 10 such pairs
4th DNA has got 8 such pairs
So from least to maximum temperature with standing order is
2<4<3<1
QUESTION 44 west Because hydrogen bonds hold the two strands of a DNA molecule together, the...
2. The sequence below represents two DNA strands linked together by hydrogen bonds. The smaller DNA strand has a 3'-OH that will be used by the DNA polymerase to add nucleotides using the longer DNA strand as a template. You add dATP, SCTP, dTTP, and ddGTP (dideoxy-GTP); and incubate at the DNA polymerase optimum temperature to allow the extension of the smaller DNA strand. Using the symbols below, draw the extended DNA strand (you don't need to draw the template...