Biology (Raven), 10th Edition

Chapter 14: DNA: The Genetic Material

Pre-Test

1
If adenine (A) is located on the leading strand of DNA, then the same location on the lagging strand 2 must be
A)adenine.
B)thymine.
C)cytosine.
D)guanine.
E)uracil.
2
Which of the following are paired bases in DNA?
A)adenine—guanine; thymine—cytosine
B)adenine—uracil; guanine—cytosine
C)adenine—thymine; guanine—cytosine
D)adenine—adenine; guanine—guanine
E)adenine—cytosine; guanine—thymine
3
In DNA the amount of adenine is always equal to the amount of
A)cytosine.
B)uracil.
C)guanine.
D)thymine.
E)ATP.
4
The reason the amount of A = T and G = C ("Chargaff's Rule") is because
A)purines base-pair with pyrimidines.
B)phosphates alternate with pentose sugars in the DNA backbone.
C)X-ray diffraction indicated a double-helical pattern in DNA.
D)DNA has polarity.
E)All of the above explain Chargaff's Rule.
5
Formation of a replication fork results in
A)continuous synthesis of DNA on the lagging strand.
B)buildup of torsion in the DNA upstream of the fork.
C)formation of new 3' -OH regions on the template DNA.
D)binding of SSB protein on the double-stranded parental DNA.
E)All of the above occur when the replication fork is formed.
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