DNA and RNA are large polynucleotides formed by joining many mononucleotides together. The sugar in a mononucleotide of RNA is:
A deoxyribose
B glucose
C ribose
D ribulose
In a DNA double helix, the two strands are held together by:
A covalent bonds between bases
B covalent bonds between sugar molecules
C hydrogen bonds between bases
D hydrogen bonds between sugar molecules
The base present in RNA but not present in DNA is:
A cytosine
B guanine
C thymine
D uracil
The complementary base that pairs with guanine is:
A adenine
B cytosine
C guanine
