Question 1

____, the ends of eukaryotic chromosomes, shorten with every cell division.

Accepted Answer

A)  Centromeres 
B)  Telomeres 
C)  Kinetochores 
D)  Primosomes 
E)  Nucleosomes 
A)  Centromeres 
B)  Telomeres 
C)  Kinetochores 
D)  Primosomes 
E)  Nucleosomes

Question 2

Which of the following statements concerning DNA is FALSE?

Accepted Answer

A)  The structure of DNA can be described as a double helix. 
B)  DNA is a polymer of nucleotides. 
C)  Purines and pyrimidines are complementary. 
D)  The sugar present in DNA is ribose. 
E)  The two chains of DNA are antiparallel. 
A)  The structure of DNA can be described as a double helix. 
B)  DNA is a polymer of nucleotides. 
C)  Purines and pyrimidines are complementary. 
D)  The sugar present in DNA is ribose. 
E)  The two chains of DNA are antiparallel.

Question 3

In one strand of a DNA molecule, adjacent nucleotides are joined by a(n) phosphodiester linkage. 
__________________

Accepted Answer

A) True 
 B)False

Question 4

Chargaff determined that DNA from any source contains about the same amount of guanine as:

Accepted Answer

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

Question 5

X-ray diffraction images produced by ____ were used by Watson and Crick to infer the structure of DNA.

Accepted Answer

A)  Wilkins 
B)  Griffith 
C)  Franklin 
D)  Hershey 
E)  Watson and Wilkins 
A)  Wilkins 
B)  Griffith 
C)  Franklin 
D)  Hershey 
E)  Watson and Wilkins

Question 6

The first scientists to use Griffith's transformation assay to identify genetic material were:

Accepted Answer

A)  Meselson and Stahl. 
B)  Watson and Crick. 
C)  Franklin and Wilkins. 
D)  Avery, MacLeod, and McCarty. 
E)  Hershey and Chase. 
A)  Meselson and Stahl. 
B)  Watson and Crick. 
C)  Franklin and Wilkins. 
D)  Avery, MacLeod, and McCarty. 
E)  Hershey and Chase.

Question 7

Explain how apoptosis can protect the body against cancerous cells.

Accepted Answer

Apoptosis, or programmed cell

Question 8

Which of the following adds new nucleotides to a growing DNA chain?

Accepted Answer

A)  DNA polymerase 
B)  DNA helicase 
C)  RNA primer 
D)  primase 
E)  RNA polymerase 
A)  DNA polymerase 
B)  DNA helicase 
C)  RNA primer 
D)  primase 
E)  RNA polymerase

Question 9

One of the pyrimidine bases in a DNA molecule is adenine. 
__________________

Accepted Answer

A) True 
 B)False

Question 10

_____ bonds link the sugar and phosphate groups in the backbones of DNA molecules.

Accepted Answer

A)  Covalent phosphodiester 
B)  Hydrogen 
C)  Weak 
D)  Ionic 
E)  Weak covalent 
A)  Covalent phosphodiester 
B)  Hydrogen 
C)  Weak 
D)  Ionic 
E)  Weak covalent

Question 11

Okazaki fragments are found in the leading strand of DNA. 
__________________

Accepted Answer

A) True 
 B)False

Question 12

What happened in an experiment where normal cultured human cells were infected with a virus that carried DNA encoding for the telomerase catalytic subunit?

Accepted Answer

A)  The cells underwent more cell divisions than normal. 
B)  The cells underwent fewer cell divisions than normal. 
C)  The cells died almost immediately. 
D)  The cells did not express the foreign telomerase gene. 
E)  The cell cycle shortened. 
A)  The cells underwent more cell divisions than normal. 
B)  The cells underwent fewer cell divisions than normal. 
C)  The cells died almost immediately. 
D)  The cells did not express the foreign telomerase gene. 
E)  The cell cycle shortened.

Question 13

Because a newly synthesized DNA molecule contains ____, the replication process is said to be semiconservative.

Accepted Answer

A)  two new strands 
B)  one parental strand and one new strand 
C)  two parental strands 
D)  half purines and half pyrimidines 
E)  nucleotides 
A)  two new strands 
B)  one parental strand and one new strand 
C)  two parental strands 
D)  half purines and half pyrimidines 
E)  nucleotides

Question 14

X-ray diffraction studies are used to determine the:

Accepted Answer

A)  sequence of amino acids in protein molecules. 
B)  sequence of nucleotides in nucleic acid molecules. 
C)  distances between atoms of molecules. 
D)  identity of an unknown chemical. 
E)  wavelength of X-rays. 
A)  sequence of amino acids in protein molecules. 
B)  sequence of nucleotides in nucleic acid molecules. 
C)  distances between atoms of molecules. 
D)  identity of an unknown chemical. 
E)  wavelength of X-rays.

Question 15

If DNA replication rejoined the two parental strands, it would be termed:

Accepted Answer

A)  dispersive. 
B)  gradient. 
C)  semiconservative. 
D)  parental. 
E)  conservative. 
A)  dispersive. 
B)  gradient. 
C)  semiconservative. 
D)  parental. 
E)  conservative.

Question 16

In the experiments of Griffith, the conversion of nonlethal R-strain bacteria to lethal S-strain bacteria:

Accepted Answer

A)  was due to genetic mutation. 
B)  was due to transformation. 
C)  proved that proteins are the genetic material. 
D)  could not be reproduced by other researchers. 
E)  was similar to experiments performed by Watson and Crick. 
A)  was due to genetic mutation. 
B)  was due to transformation. 
C)  proved that proteins are the genetic material. 
D)  could not be reproduced by other researchers. 
E)  was similar to experiments performed by Watson and Crick.

Question 17

Adenine and thymine are held together by two hydrogen bonds in a double stranded DNA molecule.

Accepted Answer

A) True 
 B)False

Question 18

The two molecules that alternate to form the backbone of a polynucleotide chain are:

Accepted Answer

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

Question 19

Okazaki fragments are joined together by:

Accepted Answer

A)  RNA polymerase. 
B)  DNA ligase. 
C)  DNA polymerase. 
D)  RNA ligase. 
E)  primase. 
A)  RNA polymerase. 
B)  DNA ligase. 
C)  DNA polymerase. 
D)  RNA ligase. 
E)  primase.

Question 20

What happens during nucleotide excision repair?

Accepted Answer

A)  A mismatch mutation is repaired. 
B)  A nuclease removes the damaged DNA. 
C)  DNA polymerase joins the repaired DNA together. 
D)  DNA ligase adds new nucleotides to the repaired DNA strand. 
E)  DNA is damaged. 
A)  A mismatch mutation is repaired. 
B)  A nuclease removes the damaged DNA. 
C)  DNA polymerase joins the repaired DNA together. 
D)  DNA ligase adds new nucleotides to the repaired DNA strand. 
E)  DNA is damaged.

Exam 12: Dna the Carrier of Genetic Information

____, the ends of eukaryotic chromosomes, shorten with every cell division.

Which of the following statements concerning DNA is FALSE?

In one strand of a DNA molecule, adjacent nucleotides are joined by a(n) phosphodiester linkage. __________________

Chargaff determined that DNA from any source contains about the same amount of guanine as:

X-ray diffraction images produced by ____ were used by Watson and Crick to infer the structure of DNA.

The first scientists to use Griffith's transformation assay to identify genetic material were:

Explain how apoptosis can protect the body against cancerous cells.

Which of the following adds new nucleotides to a growing DNA chain?

One of the pyrimidine bases in a DNA molecule is adenine. __________________

_____ bonds link the sugar and phosphate groups in the backbones of DNA molecules.

Okazaki fragments are found in the leading strand of DNA. __________________

What happened in an experiment where normal cultured human cells were infected with a virus that carried DNA encoding for the telomerase catalytic subunit?

Because a newly synthesized DNA molecule contains ____, the replication process is said to be semiconservative.

X-ray diffraction studies are used to determine the:

If DNA replication rejoined the two parental strands, it would be termed:

In the experiments of Griffith, the conversion of nonlethal R-strain bacteria to lethal S-strain bacteria:

Adenine and thymine are held together by two hydrogen bonds in a double stranded DNA molecule.

The two molecules that alternate to form the backbone of a polynucleotide chain are:

Okazaki fragments are joined together by:

What happens during nucleotide excision repair?

A View of Life

Atoms and Molecules the Chemical Basis of Life

The Chemistry of Life Organic Compounds

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp Energy-Releasing Pathways

Photosynthesis Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

Gene Expression

Gene Regulation

Dna Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure Growth and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function an Introduction

Protection Support and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Introduction to Ecology Population Ecology

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

Filters