NUCLEIC ACIDS QUIZ

Which of the following is a purine?

Adenine

Thymine

Uracil

Cytosine

TRUE ANSWER : ?
YOUR ANSWER : ?

A purine with an amine (NH2) group on the 6th carbon is

guanine

cytosine

adenine

thymine

TRUE ANSWER : ?
YOUR ANSWER : ?

The most stabilizing force for nucleic acids is

conformational entropy

electrostatic bond

hydrogen bonds

Van der Waals

TRUE ANSWER : ?
YOUR ANSWER : ?

Because DNA is a highly charged polyanion, its stability to heat denaturation

increases with increasing salt

decreases with increasing salt

does not depend on hydrophobic interactions

is independent of G - C content

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is found on RNA but not DNA?

Phosphate

Uracil

Adenine

Deoxyribose

TRUE ANSWER : ?
YOUR ANSWER : ?

A five carbon sugar lacking a hydrogen at the number 2 carbon is found in

mRNA

DNA

rDNA

RNA

TRUE ANSWER : ?
YOUR ANSWER : ?

In gel electrophoresis, what fragments will move most quickly through a gel?

Small fragments

None of these

Large fragments

Large genome

TRUE ANSWER : ?
YOUR ANSWER : ?

Nucleoside is a pyrimidine or purine base

covalently bonded to a sugar

ionically bonded to a sugar

None of these

hydrogen bonded to a sugar

TRUE ANSWER : ?
YOUR ANSWER : ?

Thymidine

can participate in hydrophobic interactions due to its methyl group

All of these

normally forms two hydrogen bonds with adenosine

is replaced by uracil in RNA

TRUE ANSWER : ?
YOUR ANSWER : ?

The sugar in RNA is , the sugar in DNA is

ribose, uracil

deoxyribose, ribose

ribose, deoxyribose

ribose, phosphate

TRUE ANSWER : ?
YOUR ANSWER : ?

↑