List of top Biochemistry Questions on DNA Structure

Assertion (A): The two strands of DNA are complementary to each other.
Reason (R): The hydrogen bonds are formed between specific pairs of bases.
Why the absorption of UV light by double stranded DNA increases (hyperchromic effect) when the DNA is denatured?
E. coli is grown exclusively in a medium containing \(^{15}NH_4Cl\) as the sole nitrogen source. Subsequently, the cells were shifted to a medium containing \(^{14}NH_4Cl\). The molar ratio of hybrid DNA (\(^{15}N-^{14}N\)) to light DNA (\(^{14}N-^{14}N\)) after four generations (rounded off to two decimal places) will be .......
The DNA double helix measures 0.34 nm/bp. The diameter of a nucleosome core particle is 11 nm. If the ratio of wrapped DNA length to nucleosome diameter is 4.51, the length of DNA around the nucleosome (to the nearest integer) is ...... bp.
The DNA double helix measures 0.34 nm/bp. The diameter of a nucleosome core particle is 11 nm. If the ratio of wrapped DNA length to nucleosome diameter is 4.51, the length of DNA around the nucleosome (to the nearest integer) is ...... bp.
E. coli is grown exclusively in a medium containing \(^{15}NH_4Cl\) as the sole nitrogen source. Subsequently, the cells were shifted to a medium containing \(^{14}NH_4Cl\). The molar ratio of hybrid DNA (\(^{15}N-^{14}N\)) to light DNA (\(^{14}N-^{14}N\)) after four generations (rounded off to two decimal places) will be .......
Which one of the following DNA repair systems requires DNA glycosylases?
In a sample of double-stranded DNA, if adenine is 28 percent, what is the amount of cytosine present?
A nucleotide consists of all of the following except?
At physiological pH, DNA molecules are:
Which DNA makes a right-handed helix?
Which DNA makes a left-handed helix?