• DNA is a polymer of:
A. Nucleosides
B. fatty acids
C. deoxyribose sugars connected by covalent
bonds
D. nucleotides
Which of the following are
pyrimidines?
A.
B.
C.
D.
E.
adenine and cytosine
adenine and guanine
adenine and thymine
cytosine and guanine
cytosine and thymine
Which of the following are purines?
A.
B.
C.
D.
E.
adenine and cytosine
adenine and guanine
adenine and thymine
cytosine and guanine
cytosine and thymine
A nucleic acid was analyzed and found to
contain 32 percent A, 18 percent G, 17
percent C, and 33 percent T. The nucleic
acid must be:
A.
B.
C.
D.
single-stranded RNA
single-stranded DNA
double-stranded RNA
double-stranded DNA
A nucleic acid was analyzed and found to
contain 37 percent A, 16 percent G, 22
percent C, and 25 percent T. The nucleic
acid must be:
A. single-stranded RNA
B. single-stranded DNA
C. double-stranded RNA
D. double-stranded DNA
The two polynucleotide chains in DNA
are:
A.
B.
C.
D.
E.
Semidiscontinuous
Semiconservative
Parallel
Discontinuous
antiparallel
In the semiconservative replication of DNA,
progeny DNA molecules consist of:
A. one-half of the molecules with two parental
strands and one-half of the molecules with
two new strands
B. all molecules with interspersed parental and
new segments
C. all molecules with one parental and one new
strand
D. all molecules with two new strands
• What are the complementary base-pairing
rules?
• What chemical group is found at the 5' end of a
polynucleotide chain?
• What is the base sequence of the DNA strand
that would be complementary to the following
single-stranded DNA molecule?
5' GGATCTGATCCAGTCA 3‘
• The percent of cytosine in a double-stranded
DNA is 21. What is the percent of thymine in
that DNA?
• The percent of adenine in a double-stranded
DNA is 38. What is the percent of cytosine in
that DNA?
• The percent of guanine in a double-stranded
DNA is 14. What is the percent of adenine in that
DNA?
• Describe the replication of the leading strand
(briefly)
• Describe the replication of the lagging strand
(briefly)
• State the main purpose of DNA replication
Challenge Questions:
• DNA from a virus contains 19 percent A, 29
percent T, 25 percent G, and 27 percent C.
Interpret these data.
• Research shows that there is generally one
error in every 100 million cell division in a
given gene. What are the consequences of
the error? How is the error corrected?