QUIZ 9

The nucleotide sequence of DNA is which level of structure?

• primary

• secondary

• tertiary

• quaternary

The double helix of DNA is which level of structure?

• primary

• secondary

• tertiary

• quaternary

• None of these

Which of the following is the most distinguishing difference between a purine and a pyrimidine?

• purines are found in DNA while pyrimidines are found in RNA

• purines have nitrogens in the rings while pyrimidines do not

• pyrimidines have nitrogens in the rings while purines do not

• purines are found in RNA while pyrimidines are found in DNA

• purines are double ring structures while pyrimidines have a single ring

Deoxyadenylate (dA) is a:

• purine base

• pyrimidine base

• purine based nucleoside

• purine based nucleotide

• pyrimidine based nucleotide

Which of the following nucleobases is a purine?

• adenine

• cytosine

• thymine

• uracil

The fundamental differences between RNA and DNA are:

• the organic bases only

• bases, ribose units, and the phosphodiester linkage

• bases, ribose units, and the glycosidic bond type

• bases and the ribose units only

The backbone of nucleic acids consists of:

• a phosphodiester bond between the 2' and 5' hydroxyl groups of neighboring sugars

• a phosphodiester bond between the 3' and 5' hydroxyl groups of neighboring sugars

• a glycosidic bond between a pyrimidine and a sugar

• a glycosidic bond between a purine and a sugar

The oligonucleotide AGGUCCAUUGAAp, is best described as:

• an RNA oligonucleotide with a 3'phosphate

• an RNA oligonucleotide with a 5'phosphate

• a DNA oligonucleotide with a 3'phosphate

• a DNA oligonucleotide with a 5'phosphate

Which of the following statements is true for double-stranded DNA?

• The amount of A is the same as the amount of T, and the amount of G is the same as the amount of C.

• The amount of A is the same as the amount of G, and the amount of T is the same as the amount of C.

• The amount of A is the same as the amount of C, and the amount of G is the same as the amount of T.

• More than one of the above is true.

Which is the dominant form of DNA found in the cell?

• A

• B

• Z

• H

• All forms of DNA are found in equal amounts