Multiple choice questions – genetics | Quick Homework Help
The term replication refers to DNA’s ability to
a. attack bacteriaphages
b. make copies of itself
c. respond to X-ray photography
d. twist into a helix
Meselson and Stahl performed the density-gradient centrifugation of DNA in a solution of calcium chloride.
a. True
b. False
Sulfur is
a. found in bacteria but not viruses.
b. found in proteins but not nucleic acids.
c. found in nucleic acid but not proteins.
d. found in viruses but not bacteria.
e. needed for bacteriophages to attach to bacteria.
Chargaff’s rule state that in DNA, the amount of adenine equals
a. the amount of cytosine
b. the amount guanine
c. the amount of thymine
d. the amount of guanine and thymine
Each complete turn of the DNA helix is how long?
a. 2.0 nm
b. 5.0 nm
c. 2.1 nm
d. 3.0 nm
e. 3.4 nm
Griffin did an experiment in which live R bacteria was changed by dead S bacteria. Such a change is an example of
Select one:
a. translocation
b. transformation
c. transduction
d. fertilization
One of Chargaff’s rules state
a. A + T = G + C
b. A + G = T + C
c. A = G, T = C
d. A = C, T = G
The diameter of the DNA laIDer is always
a. 2.5 nm
b. 1.5 nm
c. 2.0 nm
d. 3.0 nm
e. 3.4 nm
Which of the following is a purine base?
a. thymine
b. malomine
c. adenine
d. All of the above
e. cytosine
According to the base pairing rules, guanine binds with
a. guanine
b. adenine
c. thymine
d. cytosine
Which of the following is a pyrimidine base?
Select one:
a. colchicines
b. guanine
c. adenine
d. None of the answers
e. thymine
Each nucleotide in a DNA molecule is constructed of
Select one:
a. a phosphate group, a five carbon sugar, and a nitrogen base
b. a phosphate group, a six carbon sugar, and a nitrogen base
c. a phosphate group, a five carbon sugar, and a oxygen base
d. a sulfur group, a five carbon sugar molecule, and a nitrogen base
