part 2

1) The classic experiment that demonstrated that
radioactively labeled viral DNA transforms bacterial cells was performed by

a. Griffith

b. Avery, MacLeod, and McCarty

c. Kossel and Levene

d. Hershey and Chase

e. Watson and Crick

) Which of the following describes the flow of genetic
information as stated in the central dogma of molecular biology?

a. RNAàproteinàDNA

b. RNAàDNAàprotein

c. proteinàRNAàDNA

d. DNAàRNAàprotein

e. proteinàDNAàRNA

The DNA “backbone” is composed of

a. an amide bond between deoxyribose and a nitrogenous base

b. a glycosidic bond between deoxyribose and a nitrogenous
base

c. a phosphodiester
bond between the 3’- and 5’- hydroxyl groups of adjacent deoxyribose residues

d. a phosphodiester bond between the 2’- and 5’- hydroxyl
groups of adjacent deoxyribose residues

e. none of the above

Nucleosomes are composed of all of the following except
________.

There are approximately _________ human genes.

a. 10,000

b. 20,000

c. 100,000

d. 1,000,000

e. 10,000,000

)______ are gene sequences that code for a gene product.

a. introns

b. exons

c. nucleosomes

d. cruciforms

e. snurps

A genome is

Protein synthesis is called:

The entire set of proteins synthesized by a cell is called

The polyamines assist in the compression of eukaryotic chromosome
structure because they

) In nucleosome structure the histone ________ aids in
stabilizing the wrapping of DNA around the protein octomer.

Chromatin contains several levels of structure which include

a. nucleosomes

b. 200 nm filaments

c. 30 nm fiber

d. both B and C are correct

e. all of the above
are correct

D loops and variable loops
are found in _______

Which of the following are involved in the splicing of RNA
molecules?

a. snurps

b. snRNA

c. rRNA

d. both a and b are
correct

e. all of the above are correct

) The DNA strand that acts as a template during
transcription is referred to as the ______ strand.

a. sense

b. antisense

c. transcribed

d. all of the above are correct

e. none of the above are correct

Determine the mRNA sequence for the following DNA sequence.

5’-GCCATTTCCCGTTA-3’

Which of the following does not contribute to the
noncovalent interactions that stabilize the helical strands of DNA

During a transition mutation which of the following bases
would be substituted for cytosine?

HIV infection of a susceptible cell is initiated when the
gp120 envelope protein binds the _______ antigen