Question

Select the true statements.

Select one or more:

a. The strands of DNA in the helix run parallel to one another

b. Naked DNA is arranged into a double helix

c. Naked prokaryotic and eukaryotic DNA cannot be joined as they are too dissimilar

d. The DNA double helix has major and minor grooves

e. The DNA molecule is only stabilised by hydrogen bonds

Answer 1

Option B). is correct. Naked DNA is arranged into a double helix. According to the model of Watson and Crick DNA have 2 strands spirally wound to one another and runs antiparallel to one another in double helical form. They have alternate major and minor groove.

Option D) is also correct. The DNA double helix has major and minor grooves.

# option A is wrong because DNA runs antiparellel.

Option C is wrong because DNA of eukaryotes is often joined to bacterial genome during gene cloning techniques

Option E is wrong because hydrophobic base stacking also plays a major role in DNA stablizing.