The two strands of a double helix model of $DNA$ are held together by hydrogen bonds between
sugar and phosphate groups.
sugar and nitrogenous bases.
phosphate groups and nitrogenous bases.
nitrogenous bases.
Retroviruses do not follow central Dogma. Comment
Which of the following is a nucleoside?
Which one of the following is not applicableto $RNA$ ?
Which of the following is not correct
Which amino acids are present in histones