Question 1

The function of helicase enzymes is to ____.

Accepted Answer

A)   break hydrogen bonds between the two strands of the DNA molecule prior to replication
B)   rewind the two DNA molecules after replication
C)   remove bases that might have been inserted incorrectly
D)   seal new short stretches of nucleotides into one continuous strand
E)   fragment old DNA that is no longer of use to the cell

Question 2

One current goal of cloning is to ____.

Accepted Answer

A)   duplicate certain humans
B)   create new species
C)   promote evolution
D)   experiment with alien DNA
E)   retain an animal's desirable characteristics

Question 3

Choose the one most appropriate answer for each.
-Watson and Crick

Accepted Answer

A)  Discovered that the hereditary system of one strain of bacteria could be transformed by the hereditary system from another strain of bacteria
B)  First to describe DNA and extract it from cell nuclei
C)  Discovered that DNA-digesting enzymes prevented bacterial transformation
D)  The first to build an accurate model of DNA and to describe it explicitly in a publication
E)  The first to demonstrate, through the use of radioactive isotopes, that DNA, not protein, is the genetic materialF) Provided two important clues to the structure of DNA; one clue is that A = T and the other is that C = GG) Worked at King's College at the same time as FranklinH) Obtained excellent x-ray diffraction photographs that suggested that DNA was a long, thin molecule with regularly repeating units

Question 4

Name the structure in which proteins associate with DNA and pack it very tightly by organizing the molecules.

Accepted Answer

A)   Histones
B)   Chromosomes
C)   Lysosomes
D)   Ribosomes
E)   Homologous lysosomes

Question 5

Answer the following questions about Griffith's experiments involving Streptococcus pneumoniae.  Figure 8.3

-If an injection to the mouse contains live S strain Streptococcus pneumonia,____.

Accepted Answer

A)   the mouse will develop fatal pneumonia.
B)   live R strain will be detected in the mouse's blood
C)   the mouse will remain healthy.
D)   no live S strain will be detected in the mouse's blood
E)   the live S strain bacteria will lose their pathogenicity

Question 6

Semiconservative replication is so-called because one strand of each new DNA molecule is ____________________,while the other is ______________________.

Accepted Answer

Conserved/...

Question 7

Watson and Crick were the first to ____________.

Accepted Answer

A)   discover DNA's double helical structure
B)   discover DNA
C)   isolate DNA
D)   build the first DNA model
E)   clone DNA

Question 8

In somatic cell nuclear transfer,a somatic cell is injected into an ________ egg,thus providing a ________ nucleus.

Accepted Answer

The answer of In somatic cell nuclear transfer,a somatic cell...

Question 9

Choose the one most appropriate answer for each.
-Chargaff

Accepted Answer

A)  Discovered that the hereditary system of one strain of bacteria could be transformed by the hereditary system from another strain of bacteria
B)  First to describe DNA and extract it from cell nuclei
C)  Discovered that DNA-digesting enzymes prevented bacterial transformation
D)  The first to build an accurate model of DNA and to describe it explicitly in a publication
E)  The first to demonstrate, through the use of radioactive isotopes, that DNA, not protein, is the genetic materialF) Provided two important clues to the structure of DNA; one clue is that A = T and the other is that C = GG) Worked at King's College at the same time as FranklinH) Obtained excellent x-ray diffraction photographs that suggested that DNA was a long, thin molecule with regularly repeating units

Question 10

An enzyme that seals gaps or breaks in double stranded DNA is called _________.

Accepted Answer

A)   DNA autosome
B)   DNA polymerase
C)   DNA replication
D)   DNA diploid
E)   DNA ligase

Question 11

What characteristic of a species refers to having two of each type of chromosome?

Accepted Answer

A)   Autosomal
B)   Karyotype
C)   Diploid
D)   Base-paired
E)   Helical

Question 12

Experiments with bacteria and ____________________ offered solid evidence that deoxyribonucleic acid (DNA),not protein,is the hereditary material.

Accepted Answer

The answer of Experiments with bacteria and ____________________ offered solid...

Question 13

Figure 8.12
-In the accompanying figure,the green rectangular shape represents__________.

Accepted Answer

A)   DNA transferase
B)   DNA helicase
C)   RNA polymerase
D)   DNA polymerase
E)   DNA hybridization

Question 14

Which base-pairing system is correct?

Accepted Answer

A)   A to G; T to C
B)   A to T; G to C
C)   A to C; G to T
D)   A to T or C; G to C or A
E)   A to T or G; G to C or A

Question 15

DNA replication is ____.

Accepted Answer

A)   redundant
B)   semiconservative
C)   progressive
D)   conservative
E)   repetitive

Question 16

How many nucleotides can be added by eukaryotic polymerases per second?

Accepted Answer

A)   400
B)   40
C)   500
D)   50
E)   1,000

Question 17

Choose the one most appropriate answer for each.
-Franklin

Accepted Answer

A)  Discovered that the hereditary system of one strain of bacteria could be transformed by the hereditary system from another strain of bacteria
B)  First to describe DNA and extract it from cell nuclei
C)  Discovered that DNA-digesting enzymes prevented bacterial transformation
D)  The first to build an accurate model of DNA and to describe it explicitly in a publication
E)  The first to demonstrate, through the use of radioactive isotopes, that DNA, not protein, is the genetic materialF) Provided two important clues to the structure of DNA; one clue is that A = T and the other is that C = GG) Worked at King's College at the same time as FranklinH) Obtained excellent x-ray diffraction photographs that suggested that DNA was a long, thin molecule with regularly repeating units

Question 18

If a mixture of bacteriophages,some labeled with radioactive sulfur and others labeled with radioactive phosphorus,is placed in a bacterial culture,the bacteria will eventually contain ____.

Accepted Answer

A)   primarily radioactive sulfur
B)   primarily radioactive phosphorus
C)   both radioactive sulfur and phosphorus
D)   neither radioactive sulfur nor radioactive phosphorus
E)   complete viruses with radioactive sulfur coats

Question 19

Classification. Answer the following questions in reference to the five nucleotides listed below.
-Three hydrogen bonds connect guanine to __________ in the DNA molecule.

Accepted Answer

A)  Guanine
B)  Cytosine
C)  Pyrimidine
D)  Thymine
E)  Uracil

Question 20

Which statement is true of embryonic splitting?

Accepted Answer

A)   It never occurs in nature.
B)   It involves the genetic contribution of only one parent.
C)   It produces immediate differentiation.
D)   It is applied in animal husbandry to produce genetically diverse offspring.
E)   It produces identical twins.

Exam 8: DNA Structure and Function

The function of helicase enzymes is to ____.

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Watson and Crick were the first to ____________.

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What characteristic of a species refers to having two of each type of chromosome?

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Which base-pairing system is correct?

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In somatic cell nuclear transfer,a somatic cell is injected into an ________ egg,thus providing a ________ nucleus.

Correct AnswerverifiedShow Answer

Classification. Answer the following questions in reference to the five nucleotides listed below. -Three hydrogen bonds connect guanine to __________ in the DNA molecule.

Correct AnswerverifiedShow Answer

Choose the one most appropriate answer for each. -Watson and Crick

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How many nucleotides can be added by eukaryotic polymerases per second?

Correct AnswerverifiedShow Answer

Figure 8.12 -In the accompanying figure,the green rectangular shape represents__________.

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If a mixture of bacteriophages,some labeled with radioactive sulfur and others labeled with radioactive phosphorus,is placed in a bacterial culture,the bacteria will eventually contain ____.

Correct AnswerverifiedShow Answer

An enzyme that seals gaps or breaks in double stranded DNA is called _________.

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Choose the one most appropriate answer for each. -Franklin

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One current goal of cloning is to ____.

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Experiments with bacteria and ____________________ offered solid evidence that deoxyribonucleic acid (DNA),not protein,is the hereditary material.

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Which statement is true of embryonic splitting?

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Answer the following questions about Griffith's experiments involving Streptococcus pneumoniae. Figure 8.3 -If an injection to the mouse contains live S strain Streptococcus pneumonia,____.

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Choose the one most appropriate answer for each. -Chargaff

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Name the structure in which proteins associate with DNA and pack it very tightly by organizing the molecules.

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DNA replication is ____.

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Semiconservative replication is so-called because one strand of each new DNA molecule is ____________________,while the other is ______________________.

Correct AnswerverifiedConserved/...View AnswerShow Answer

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In somatic cell nuclear transfer,a somatic cell is injected into an egg,thus providing a nucleus.

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Semiconservative replication is so-called because one strand of each new DNA molecule is ,while the other is __.

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Conserved/...
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