Question 1

The proofreading, mismatch, and _______ repair systems use information from the parental strand of DNA to correct errors in the replicated strand.

Accepted Answer

The answer of The proofreading, mismatch, and _______ repair systems...

Question 2

When double-stranded DNA is heated to temperatures above 90°C, it denatures.Denaturation is a process that
a. hydrolyzes DNA.
b. irreversibly destroys the double helical structure.
c. separates double-stranded DNA into two single strands.
d. causes new hydrogen bonds to form.
e. breaks covalent bonds.

Accepted Answer

The answer of When double-stranded DNA is heated to temperatures...

Question 3

In DNA replication, nucleotides are added to the growing new strand at the _______ end, the end at which the DNA strand has a free _______ group.

Accepted Answer

A)  3F1F1F1S1F1F1F10; hydroxyl 
B)  3F1F1F1S1F1F1F10; phosphate 
C)  5F1F1F1S1F1F1F10; hydroxyl 
D)  5F1F1F1S1F1F1F10; methyl 
E)  5F1F1F1S1F1F1F10; phosphate 
A)  3F1F1F1S1F1F1F10; hydroxyl 
B)  3F1F1F1S1F1F1F10; phosphate 
C)  5F1F1F1S1F1F1F10; hydroxyl 
D)  5F1F1F1S1F1F1F10; methyl 
E)  5F1F1F1S1F1F1F10; phosphate

Question 4

In DNA replication, each newly made strand is

Accepted Answer

A)  identical in DNA sequence to the strand from which it was copied. 
B)  complementary in sequence to the strand from which it was copied. 
C)  oriented in the same 3ʹ-to-5ʹ direction as the strand from which it was copied. 
D)  an incomplete copy of one of the parental strands. 
E)  a hybrid molecule consisting of both ribo- and deoxyribonucleotides. 
A)  identical in DNA sequence to the strand from which it was copied. 
B)  complementary in sequence to the strand from which it was copied. 
C)  oriented in the same 3ʹ-to-5ʹ direction as the strand from which it was copied. 
D)  an incomplete copy of one of the parental strands. 
E)  a hybrid molecule consisting of both ribo- and deoxyribonucleotides.

Question 5

Which type of molecule functions to transfer information from one generation to the next in eukaryotes?

Accepted Answer

A)  DNA 
B)  mRNA 
C)  tRNA 
D)  Protein 
E)  Lipid 
A)  DNA 
B)  mRNA 
C)  tRNA 
D)  Protein 
E)  Lipid

Question 6

The _______ DNA repair system operates together with DNA replication.

Accepted Answer

A)  excision 
B)  mismatch 
C)  proofreading 
D)  polymerase 
E)  ligase 
A)  excision 
B)  mismatch 
C)  proofreading 
D)  polymerase 
E)  ligase

Question 7

Refer to the figure, which shows DNA complementary base pairing.   What are the first four bases that would pair (from top to bottom) with the exposed 3ʹ end strand?

Accepted Answer

The answer of Refer to the figure, which shows DNA...

Question 8

An alien DNA-like molecule is isolated from the frozen remains of a life form found beneath the Martian polar ice caps.In this sample, for every base designated Q, there is twice that amount of base R; for every base Z, there is twice that amount of base S.Assuming that there is base bonding, a likely conclusion from these observed ratios is that one base _______ bonds with _______ base _______.

Accepted Answer

A)  Q; one; R 
B)  Q; two; Rs 
C)  R; two; Qs 
D)  Z; one; S 
E)  S; two; Rs 
A)  Q; one; R 
B)  Q; two; Rs 
C)  R; two; Qs 
D)  Z; one; S 
E)  S; two; Rs

Question 9

Refer to the figure, which shows DNA replication.   Which diagram (A or B) shows conservative replication?

Accepted Answer

The answer of Refer to the figure, which shows DNA...

Question 10

What attribute of the DNA polymerase from the bacterium Thermus aquaticus makes it valuable in the PCR technique?

Accepted Answer

T.aquaticus DNA polymerase is still func

Question 11

Eggs and sperm must contain all the DNA of an organism.To ensure complete DNA, these cells would be expected to

Accepted Answer

A)  have high levels of telomerase. 
B)  have very low levels of telomerase. 
C)  undergo the polymerase chain reaction. 
D)  lack DNA polymerase. 
E)  lack Okazaki fragments. 
A)  have high levels of telomerase. 
B)  have very low levels of telomerase. 
C)  undergo the polymerase chain reaction. 
D)  lack DNA polymerase. 
E)  lack Okazaki fragments.

Question 12

In skin fibroblasts heavily exposed to sunlight, the _______ DNA repair system would repair UV-induced mutations.

Accepted Answer

A)  excision 
B)  mismatch 
C)  proofreading 
D)  polymerase 
E)  ligase 
A)  excision 
B)  mismatch 
C)  proofreading 
D)  polymerase 
E)  ligase

Question 13

In the Meselson‒Stahl experiment, cesium chloride solution

Accepted Answer

A)  helped the DNA polymerase replicate DNA. 
B)  was the template. 
C)  was used to assess the density of the DNA. 
D)  was used to label the DNA. 
E)  was a deoxyribonucleoside. 
A)  helped the DNA polymerase replicate DNA. 
B)  was the template. 
C)  was used to assess the density of the DNA. 
D)  was used to label the DNA. 
E)  was a deoxyribonucleoside.

Question 14

If a mutation changes a G to an A on one strand of a DNA molecule, with a corresponding change in its complement, which attribute of DNA will most likely be affected?

Accepted Answer

A)  The width of the DNA molecule 
B)  The length of the DNA molecule 
C)  The nature of protein‒DNA interactions 
D)  The number of purines in the double-stranded molecule 
E)  All of the above are equally likely to be affected. 
A)  The width of the DNA molecule 
B)  The length of the DNA molecule 
C)  The nature of protein‒DNA interactions 
D)  The number of purines in the double-stranded molecule 
E)  All of the above are equally likely to be affected.

Question 15

Guanine is a(n)

Accepted Answer

A)  genetic marker. 
B)  enzyme. 
C)  pyrimidine. 
D)  purine. 
E)  dye used to label DNA. 
A)  genetic marker. 
B)  enzyme. 
C)  pyrimidine. 
D)  purine. 
E)  dye used to label DNA.

Question 16

Comparison of the genomic sequences of parental and progeny viruses indicated a high level of error in replication.This information suggests that the DNA polymerase replicating the viral DNA lacked a _______ mechanism.

Accepted Answer

The answer of Comparison of the genomic sequences of parental...

Question 17

DNA is held together in a double helix by the force of

Accepted Answer

A)  the twists. 
B)  covalent bonds. 
C)  ionic bonds. 
D)  ionic interactions. 
E)  hydrogen bonds. 
A)  the twists. 
B)  covalent bonds. 
C)  ionic bonds. 
D)  ionic interactions. 
E)  hydrogen bonds.

Exam 13: Dna and Its Role in Heredity

The proofreading, mismatch, and _______ repair systems use information from the parental strand of DNA to correct errors in the replicated strand.

In DNA replication, nucleotides are added to the growing new strand at the _______ end, the end at which the DNA strand has a free _______ group.

In DNA replication, each newly made strand is

Which type of molecule functions to transfer information from one generation to the next in eukaryotes?

The _______ DNA repair system operates together with DNA replication.

Refer to the figure, which shows DNA complementary base pairing. What are the first four bases that would pair (from top to bottom) with the exposed 3ʹ end strand?

Refer to the figure, which shows DNA replication. Which diagram (A or B) shows conservative replication?

What attribute of the DNA polymerase from the bacterium Thermus aquaticus makes it valuable in the PCR technique?

Eggs and sperm must contain all the DNA of an organism.To ensure complete DNA, these cells would be expected to

In skin fibroblasts heavily exposed to sunlight, the _______ DNA repair system would repair UV-induced mutations.

In the Meselson‒Stahl experiment, cesium chloride solution

If a mutation changes a G to an A on one strand of a DNA molecule, with a corresponding change in its complement, which attribute of DNA will most likely be affected?

Guanine is a(n)

Comparison of the genomic sequences of parental and progeny viruses indicated a high level of error in replication.This information suggests that the DNA polymerase replicating the viral DNA lacked a _______ mechanism.

DNA is held together in a double helix by the force of

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In DNA replication, nucleotides are added to the growing new strand at the _ end, the end at which the DNA strand has a free _ group.