MOLECULAR BIOLOGY TEST REVIEW QUESTIONS WITH VERIFIED SOLUTIONS

MOLECULAR BIOLOGY TEST REVIEW
QUESTIONS WITH VERIFIED
SOLUTIONS

DNA and RNA are polymers called_, and are made of monomers called __ - ANSWER-
nucleic acids; amino acids

What are the three parts of a nucleotide? - ANSWER-nitrogen base, phosphate group,
sugar

What does the pentagon, indicated by the number 1 on the figure, represent? -
ANSWER-sugar

What does the circle, indicated by the number 2 on the figure, represent? - ANSWER-
phosphate

What do the numbers 3 and 4 on the figure represent? - ANSWER-nitrogen base

What type of sugar is found in DNA? - ANSWER-deoxyribose

What are the four nitrogen bases in DNA? - ANSWER-adenine, guanine, cytosine,
thymine

How do the bases pair in DNA? - ANSWER-adenine and thymine; cytosine and guanine

What scientist discovered the base pairing rules? - ANSWER-chargaff

List the three ways that RNA is different from DNA. - ANSWER-1. In DNA, the sugar is
deoxyribose and in RNA the sugar is ribose.
2. In RNA, thymine is changed from thymine to uracil.
3. RNA is usually single stranded unlike DNA which is a double helix.

If the DNA double helix were a twisted ladder, what would the sides of the ladder be
made of? - ANSWER-sugar and phosphate

What type of bonds hold together the sides of the DNA molecule? - ANSWER-covalent

What would the rungs of the ladder be made of? - ANSWER-4 Nitrogen bases- adenine,
thymine, cytosine, guanine

What type of bonds hold together the rungs of the DNA molecule? - ANSWER-hydrogen