Question 1

If a person had defective centromeres, which of the following would result?

Accepted Answer

A)  the DNA would not coil around histones 
B)  DNA could not duplicate 
C)  sister chromatids could not attach to each other 
D)  the chromosome number would be reduced 
E)  none of these would result 
A)  the DNA would not coil around histones 
B)  DNA could not duplicate 
C)  sister chromatids could not attach to each other 
D)  the chromosome number would be reduced 
E)  none of these would result

Question 2

Which of the following sugar molecules is involved in the structure of DNA?

Accepted Answer

A)  ribose 
B)  ribulose 
C)  deoxyribulose 
D)  deoxyribose 
E)  glucose 
A)  ribose 
B)  ribulose 
C)  deoxyribulose 
D)  deoxyribose 
E)  glucose

Question 3

Rosalind Franklin used which techniques to determine many of the physical characteristics of DNA?

Accepted Answer

A)  scanning electron microscopy 
B)  transmission electron microscopy 
C)  recombinant DNA techniques 
D)  X-ray crystallography 
E)  DNA profiling 
A)  scanning electron microscopy 
B)  transmission electron microscopy 
C)  recombinant DNA techniques 
D)  X-ray crystallography 
E)  DNA profiling

Question 4

Before a cell divides it must ____ its genetic information.

Accepted Answer

A)  duplicate 
B)  translate 
C)  isolate 
D)  protect 
E)  distribute 
A)  duplicate 
B)  translate 
C)  isolate 
D)  protect 
E)  distribute

Question 5

Which of the following statements about DNA replication is correct?

Accepted Answer

A)  DNA replication is error free 
B)  DNA replication occurs without the help of enzymes 
C)  In DNA replication, the parent strands are discarded 
D)  Each newly formed DNA molecule contains two new strands and two old strands. 
E)  Each newly formed DNA molecule contains one parent strand and three new strands. 
A)  DNA replication is error free 
B)  DNA replication occurs without the help of enzymes 
C)  In DNA replication, the parent strands are discarded 
D)  Each newly formed DNA molecule contains two new strands and two old strands. 
E)  Each newly formed DNA molecule contains one parent strand and three new strands.

Question 6

Which of the following methods would NOT result in identical twin organisms?

Accepted Answer

A)  asexual reproduction 
B)  embryo splitting 
C)  reproductive cloning 
D)  somatic cell nuclear transfer 
E)  two separate eggs fertilized by two separate sperm 
A)  asexual reproduction 
B)  embryo splitting 
C)  reproductive cloning 
D)  somatic cell nuclear transfer 
E)  two separate eggs fertilized by two separate sperm

Question 7

In a given strand of DNA, complementary bases are connected to each other by

Accepted Answer

A)  ionic bonds. 
B)  polar covalent bonds. 
C)  hydrogen bonds. 
D)  peptide bonds. 
E)  nonpolar covalent bonds. 
A)  ionic bonds. 
B)  polar covalent bonds. 
C)  hydrogen bonds. 
D)  peptide bonds. 
E)  nonpolar covalent bonds.

Question 8

Body cells of human females contain

Accepted Answer

A)  one X chromosome and one Y chromosome. 
B)  two X chromosomes. 
C)  two Y chromosomes. 
D)  two O chromosomes. 
E)  chromosomes X, Y, and O. 
A)  one X chromosome and one Y chromosome. 
B)  two X chromosomes. 
C)  two Y chromosomes. 
D)  two O chromosomes. 
E)  chromosomes X, Y, and O.

Question 9

How many types of nucleotides are found in DNA molecules?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  6 
A)  1 
B)  2 
C)  3 
D)  4 
E)  6

Question 10

In the assembly of new nucleotides to a DNA strand in DNA replication, what provides the energy for that process?

Accepted Answer

A)  ATP 
B)  the nucleotide itself 
C)  NADH 
D)  primers 
E)  DNA ligase 
A)  ATP 
B)  the nucleotide itself 
C)  NADH 
D)  primers 
E)  DNA ligase

Question 11

Which of the following is the correct complementary bonding of nitrogen containing bases in DNA?

Accepted Answer

A)  adenine and cytosine. 
B)  adenine and guanine. 
C)  cytosine and thymine. 
D)  guanine and cytosine. 
E)  guanine and thymine. 
A)  adenine and cytosine. 
B)  adenine and guanine. 
C)  cytosine and thymine. 
D)  guanine and cytosine. 
E)  guanine and thymine.

Question 12

Match between columns
                        Premises: this researcher's work suggested that DNA was double helix
used X-ray diffraction technology to elucidate the structure of DNA
built the first precise model of DNA that implied its method of replication
discovered that the phosphates of DNA were on the outside and bases on the inside
discovered that the amount of adenine in a DNA molecule was equal to the amount of thymine
discovered that the sequence of DNA differs in different organisms

Accepted Answer

The Answer of Watson and Crick and Wilkins and Franklin. is...

Question 13

What happens first in DNA replication?

Accepted Answer

A)  the DNA molecule unwinds 
B)  DNA polymerase brings new nucleotides to the old DNA strand 
C)  DNA ligase activity begins 
D)  hydrogen bonds are broken 
E)  none of these things happen first 
A)  the DNA molecule unwinds 
B)  DNA polymerase brings new nucleotides to the old DNA strand 
C)  DNA ligase activity begins 
D)  hydrogen bonds are broken 
E)  none of these things happen first

Question 14

DNA polymerase

Accepted Answer

A)  is an enzyme. 
B)  adds new nucleotides to a strand. 
C)  proofreads DNA strands to see that they are correct. 
D)  derives energy from free nucleotides for strand assembly. 
E)  is all of these. 
A)  is an enzyme. 
B)  adds new nucleotides to a strand. 
C)  proofreads DNA strands to see that they are correct. 
D)  derives energy from free nucleotides for strand assembly. 
E)  is all of these.

Question 15

DNA varies from species to species in

Accepted Answer

A)  how much adenine binds with thymine rather than with cytosine. 
B)  whether DNA is a double or a single helix. 
C)  the variation in the backbone structure. 
D)  how many different bases it contains. 
E)  its sequence of DNA base-pairs. 
A)  how much adenine binds with thymine rather than with cytosine. 
B)  whether DNA is a double or a single helix. 
C)  the variation in the backbone structure. 
D)  how many different bases it contains. 
E)  its sequence of DNA base-pairs.

Question 16

Which of the following statements is CORRECT about mutation?

Accepted Answer

A)  Mutations caused by environmental factors are always repaired. 
B)  Mutations occurring during the replication process are always harmful. 
C)  Mutations only occur during DNA replication. 
D)  Mutations occurring during the replication process only affect the secondary structure of proteins. 
E)  Mutations are permanent changes in the base sequence of DNA. 
A)  Mutations caused by environmental factors are always repaired. 
B)  Mutations occurring during the replication process are always harmful. 
C)  Mutations only occur during DNA replication. 
D)  Mutations occurring during the replication process only affect the secondary structure of proteins. 
E)  Mutations are permanent changes in the base sequence of DNA.

Question 17

Which of the following is correct about the DNA molecules that result from DNA replication?

Accepted Answer

A)  one DNA molecule has both parent strands; the other DNA molecule has two new strands. 
B)  both DNA molecules have two new strands each; the parent strands are discarded. 
C)  one DNA molecule has a parent strand and a new strand; the other DNA molecule has two new strands 
D)  both DNA molecules have one new strand and one old strand 
E)  the bottom parts of each new DNA molecule are new strands and the top parts of each new DNA molecule are old strands 
A)  one DNA molecule has both parent strands; the other DNA molecule has two new strands. 
B)  both DNA molecules have two new strands each; the parent strands are discarded. 
C)  one DNA molecule has a parent strand and a new strand; the other DNA molecule has two new strands 
D)  both DNA molecules have one new strand and one old strand 
E)  the bottom parts of each new DNA molecule are new strands and the top parts of each new DNA molecule are old strands

Question 18

Selecting the Exception Four of the five chemicals listed below are bases used to construct nucleic acids. Select the EXCEPTION.

Accepted Answer

A)  adenine 
B)  cytosine 
C)  thymine 
D)  guanine 
E)  cysteine 
A)  adenine 
B)  cytosine 
C)  thymine 
D)  guanine 
E)  cysteine

Question 19

The DNA-histone complex is most analogous to

Accepted Answer

A)  a pearl necklace. 
B)  a waterproof watch. 
C)  a microwave oven. 
D)  the gears on a bicycle. 
E)  a flashlight. 
A)  a pearl necklace. 
B)  a waterproof watch. 
C)  a microwave oven. 
D)  the gears on a bicycle. 
E)  a flashlight.

Question 20

What does ionizing radiation cause in DNA?

Accepted Answer

A)  faster replication 
B)  the formation of nucleotide dimers 
C)  kinks in the DNA molecule 
D)  breaks in the DNA molecule 
E)  base pair mismatching 
A)  faster replication 
B)  the formation of nucleotide dimers 
C)  kinks in the DNA molecule 
D)  breaks in the DNA molecule 
E)  base pair mismatching

Exam 6: Dna Structure and Function

If a person had defective centromeres, which of the following would result?

Which of the following sugar molecules is involved in the structure of DNA?

Rosalind Franklin used which techniques to determine many of the physical characteristics of DNA?

Before a cell divides it must ____ its genetic information.

Which of the following statements about DNA replication is correct?

Which of the following methods would NOT result in identical twin organisms?

In a given strand of DNA, complementary bases are connected to each other by

Body cells of human females contain

How many types of nucleotides are found in DNA molecules?

In the assembly of new nucleotides to a DNA strand in DNA replication, what provides the energy for that process?

Which of the following is the correct complementary bonding of nitrogen containing bases in DNA?

What happens first in DNA replication?

DNA polymerase

DNA varies from species to species in

Which of the following statements is CORRECT about mutation?

Which of the following is correct about the DNA molecules that result from DNA replication?

Selecting the Exception Four of the five chemicals listed below are bases used to construct nucleic acids. Select the EXCEPTION.

The DNA-histone complex is most analogous to

What does ionizing radiation cause in DNA?

Invitation to Biology

Molecules of Life

Cell Structure

Energy and Metabolism

Capturing and Releasing Energy

Gene Expression and Control

How Cells Reproduce

Patterns of Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Early Life Forms and the Viruses

Plants and Fungi

Animal Evolution

Population Ecology

Communities and Ecosystems

The Biosphere and Human Effects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Reproduction and Development

Plant Form and Function

Plant Reproduction and Development

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