Nucleic Acids (Mid 1)

Question 1

Does the missing oxygen atom make DNA nucleotides more or less polar than RNA nucleotides?

a
more polar

b
less polar

Answer 1

b
less polar

Question 2

is the strength of bonds between nucleotides of the same strand (along the sugar-phosphate backbone) stronger than, weaker than, or about the same as the bonds between nucleotides on opposite strands of DNA?

a
Stronger

b
Weaker

c
About the same

Answer 2

a
Stronger

Question 3

The sequence of one strand of DNA is shown below. What is the sequence of its complementary strand? (Assume you are going 5’ to 3’ in your complimentary strand)

“3’ATTTGGCC5’”

Answer 3

TAAACCGG

Question 4

How do the structures of RNA and DNA differ?

a
The structures that can be made from DNA are more variable and thus have more variability in function.

b
The sugar-phosphate backbone of DNA is formed by phosphodiester linkages, while the sugar-phosphate backbone of RNA is formed by peptide bonds.

c
DNA is double-stranded, forming a double helix, while RNA is usually single-stranded. The sugar in DNA is deoxyribose, whereas RNA contains ribose.

d
DNA contains the sugar ribose, while RNA contains the sugar deoxyribose.

Answer 4

c
DNA is double-stranded, forming a double helix, while RNA is usually single-stranded. The sugar in DNA is deoxyribose, whereas RNA contains ribose.