Question 1

A strand of DNA is a polymer of nucleotides held together by hydrogen bonds. True or False?

Accepted Answer

A) True 
 B)False

Question 2

The DNA of chromosomes is composed of two strands wound about each other in the shape of a ________.

Accepted Answer

double hel

Question 3

All of the following occur during DNA replication EXCEPT the:

Accepted Answer

A) separation of parental DNA strands. 
B) use of parental DNA as a template. 
C) use of DNA polymerase enzymes. 
D) synthesis of totally new double-stranded DNA molecules. 
A) separation of parental DNA strands. 
B) use of parental DNA as a template. 
C) use of DNA polymerase enzymes. 
D) synthesis of totally new double-stranded DNA molecules.

Question 4

DNA helicase is involved in "rewinding" the strands of DNA back into a helix after replication. True or False?

Accepted Answer

A) True 
 B)False

Question 5

Which of the following is TRUE regarding how the DNA in your body's cells can accumulate mutations?

Accepted Answer

A) Mistakes are never made during DNA replication; they always occur during the G1 phase of interphase. 
B) Some DNA spontaneously breaks down every second, making the chromosome significantly shorter with every passing day. 
C) The ultraviolet radiation in sunlight may induce changes in DNA. 
D) Spontaneous mutation rates are around one in every four nucleotides that are replicated. 
A) Mistakes are never made during DNA replication; they always occur during the G1 phase of interphase. 
B) Some DNA spontaneously breaks down every second, making the chromosome significantly shorter with every passing day. 
C) The ultraviolet radiation in sunlight may induce changes in DNA. 
D) Spontaneous mutation rates are around one in every four nucleotides that are replicated.

Question 6

Which of the following is TRUE in the Watson-Crick model of DNA?

Accepted Answer

A) Ribose always bonds to a nitrogenous base. 
B) During replication, the phosphate groups are copied but the base sequence is not copied. 
C) Phosphate groups always bond to ribose. 
D) The number of adenines equals the number of guanines. 
E) Four different types of bases are found in DNA. 
A) Ribose always bonds to a nitrogenous base. 
B) During replication, the phosphate groups are copied but the base sequence is not copied. 
C) Phosphate groups always bond to ribose. 
D) The number of adenines equals the number of guanines. 
E) Four different types of bases are found in DNA.

Question 7

DNA polymerase and other repair enzymes ________ the newly synthesized DNA strand during and after the replication process.

Accepted Answer

The answer of DNA polymerase and other repair enzymes ________...

Question 8

During DNA replication, the continuous daughter strand is the leading strand. True or False?

Accepted Answer

A) True 
 B)False

Question 9

In an analysis of the nucleotide composition of DNA to see which bases are equivalent in amount, which of the following is true?

Accepted Answer

A) A = C 
B) A = G and C = T 
C) A + C = G + T 
D) A + T = C + G 
A) A = C 
B) A = G and C = T 
C) A + C = G + T 
D) A + T = C + G

Question 10

DNA possesses:

Accepted Answer

A) A, U, G, and C bases. 
B) only C and T bases. 
C) only A and G bases. 
D) C, T, A, and G bases. 
E) both U and T bases. 
A) A, U, G, and C bases. 
B) only C and T bases. 
C) only A and G bases. 
D) C, T, A, and G bases. 
E) both U and T bases.

Question 11

When a cell divides:

Accepted Answer

A) each daughter cell receives a nearly perfect copy of the parent cell's genetic information. 
B) each daughter cell receives exactly half the genetic information in the parent cell. 
C) each daughter cell receives the same amount of genetic information that was in the parent cell, but it has been altered. 
A) each daughter cell receives a nearly perfect copy of the parent cell's genetic information. 
B) each daughter cell receives exactly half the genetic information in the parent cell. 
C) each daughter cell receives the same amount of genetic information that was in the parent cell, but it has been altered.

Question 12

What was the most significant conclusion of Griffith's experiments with pneumonia in mice?

Accepted Answer

A) Mice exposed to the S-strain bacterium became resistant to the R-strain bacterium. 
B) There is a substance present in dead bacteria that can cause a heritable change in living bacteria. 
C) The genetic material was definitively proven to be DNA. 
D) S-strain bacteria can cause pneumonia. 
E) Heat destroys the hereditary material. 
A) Mice exposed to the S-strain bacterium became resistant to the R-strain bacterium. 
B) There is a substance present in dead bacteria that can cause a heritable change in living bacteria. 
C) The genetic material was definitively proven to be DNA. 
D) S-strain bacteria can cause pneumonia. 
E) Heat destroys the hereditary material.

Question 13

Briefly describe the basic process of DNA replication.

Accepted Answer

DNA helicase unwinds the double helix of

Question 14

By the early 1900s, scientists had determined that heritable information existed as discrete units called genes, which were located on ________.

Accepted Answer

The answer of By the early 1900s, scientists had determined...

Question 15

Why did scientists initially think DNA would be a poor candidate for the hereditary information within a cell?

Accepted Answer

A) Griffith's experiments suggested that protein was the hereditary material. 
B) Studies showed that viruses lacking DNA passed genetic traits to the next generation. 
C) DNA was shown to be made of only four different kinds of nucleotides. 
D) The work of Franklin and Wilkins showed that DNA could not be the hereditary material. 
A) Griffith's experiments suggested that protein was the hereditary material. 
B) Studies showed that viruses lacking DNA passed genetic traits to the next generation. 
C) DNA was shown to be made of only four different kinds of nucleotides. 
D) The work of Franklin and Wilkins showed that DNA could not be the hereditary material.

Question 16

All of the following are found in DNA EXCEPT:

Accepted Answer

A) deoxyribose. 
B) guanine. 
C) a phosphate group. 
D) a phospholipid group. 
E) thymine. 
A) deoxyribose. 
B) guanine. 
C) a phosphate group. 
D) a phospholipid group. 
E) thymine.

Question 17

In the comparison of a DNA molecule to a twisted ladder, the uprights of the ladder are:

Accepted Answer

A) nitrogenous bases linked together. 
B) deoxyribose linked to phosphate. 
C) deoxyribose linked to sulfate. 
D) nitrogenous bases linked to phosphate. 
E) hydrogen bonds between bases. 
A) nitrogenous bases linked together. 
B) deoxyribose linked to phosphate. 
C) deoxyribose linked to sulfate. 
D) nitrogenous bases linked to phosphate. 
E) hydrogen bonds between bases.

Question 18

The hereditary material present in all cells is:

Accepted Answer

A) protein. 
B) RNA. 
C) DNA. 
D) R-strain. 
E) S-strain. 
A) protein. 
B) RNA. 
C) DNA. 
D) R-strain. 
E) S-strain.

Question 19

For the DNA sequence G-C-C-T-A-T in one polynucleotide chain, the sequence found in the other polynucleotide chain must be:

Accepted Answer

A) C-G-G-A-T-A. 
B) G-C-C-A-T-A. 
C) C-G-G-A-U-A. 
D) A-T-T-C-G-C. 
E) G-C-C-T-A-T. 
A) C-G-G-A-T-A. 
B) G-C-C-A-T-A. 
C) C-G-G-A-U-A. 
D) A-T-T-C-G-C. 
E) G-C-C-T-A-T.

Question 20

Based on this figure, which molecule (if any)could be attached to the 5' end of the right-hand DNA strand?

Accepted Answer

A) phosphate 
B) deoxyribose 
C) cytosine 
D) adenine 
E) No molecule could attach to this end. 
A) phosphate 
B) deoxyribose 
C) cytosine 
D) adenine 
E) No molecule could attach to this end.

Exam 11: Dna: the Molecule of Heredity

A strand of DNA is a polymer of nucleotides held together by hydrogen bonds. True or False?

The DNA of chromosomes is composed of two strands wound about each other in the shape of a ________.

All of the following occur during DNA replication EXCEPT the:

DNA helicase is involved in "rewinding" the strands of DNA back into a helix after replication. True or False?

Which of the following is TRUE regarding how the DNA in your body's cells can accumulate mutations?

Which of the following is TRUE in the Watson-Crick model of DNA?

DNA polymerase and other repair enzymes ________ the newly synthesized DNA strand during and after the replication process.

During DNA replication, the continuous daughter strand is the leading strand. True or False?

In an analysis of the nucleotide composition of DNA to see which bases are equivalent in amount, which of the following is true?

DNA possesses:

When a cell divides:

What was the most significant conclusion of Griffith's experiments with pneumonia in mice?

Briefly describe the basic process of DNA replication.

By the early 1900s, scientists had determined that heritable information existed as discrete units called genes, which were located on ________.

Why did scientists initially think DNA would be a poor candidate for the hereditary information within a cell?

All of the following are found in DNA EXCEPT:

In the comparison of a DNA molecule to a twisted ladder, the uprights of the ladder are:

The hereditary material present in all cells is:

For the DNA sequence G-C-C-T-A-T in one polynucleotide chain, the sequence found in the other polynucleotide chain must be:

Based on this figure, which molecule (if any)could be attached to the 5' end of the right-hand DNA strand?

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

The Continuity of Life: Cellular Reproduction

Patterns of Inheritance

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amidst Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

How Do Ecosystems Work

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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