3) Covalent bonds joining two nucleotides within a single strand of DNA form between:
A) a phosphate group and adenine.
C) the phosphate groups of both.
B) deoxyribose sugar and a phosphate group.
D) ribose and a base.
4) Suppose you have discovered a new virus and have isolated its nucleic acids. What feature could you look for
to determine whether the nucleic acids of this virus are RNA or DNA?
A) If it is RNA, it will contain ribose.
B) If is RNA, it will contain deoxyribose.
C) If it is DNA, the virus will not contain proteins.
D) If it is RNA, there will be no adenine.
