A nucleoside differs from a nucleotide. It lacks the
base
sugar
phosphate group
hydroxyl group
Both deoxyribose and ribose belong to a class of sugars called
trioses
hexoses
pentoses
polysaccharides
The fact that a purine always paired base through hydrogen bonds with a pyrimidine base leads to, in the DNA double helix
the antiparallel nature
the semiconservative nature
uniform width throughout DNA
uniform length in all DNA
The net electric charge on DNA and histones is
both positive
both negative
Both (a) and (b)
zero
The promoter site and the terminator site for transcription are located at
$3^{\prime}$ (downstream) end and $5^{\prime}$ (upstream) end, respectively of the transcription unit
$5^{\prime}$ (upstream) end and $3^{\prime}$ (downstream) end, respectively of the transcription unit
the $3^{\prime}$ (downstream) end