Question 1

In one strand of DNA, the nucleotide sequence is 5'- A- T- G- C- 3'. The complementary sequence in the other strand must be

Accepted Answer

A)  3'- G- C- A- T- 5'. 
B)  5'- C- G- T- A- 3'. 
C)  5'- A- T- G- C- 3'. 
D)  3'- T- A- C- G- 5'. 
A)  3'- G- C- A- T- 5'. 
B)  5'- C- G- T- A- 3'. 
C)  5'- A- T- G- C- 3'. 
D)  3'- T- A- C- G- 5'.

Question 2

Hershey and Chase concluded that is the hereditary molecule by examining how radioactively labeled molecules moved between a virus and bacteria.

Accepted Answer

A)  Lipids 
B)  DNA 
C)  phospholipids 
D)  protein 
A)  Lipids 
B)  DNA 
C)  phospholipids 
D)  protein

Question 3

Based on this figure, which molecule would attach to the 5' phosphate end of the DNA strand on the right?

Accepted Answer

A)  Adenine 
B)  Cytosine 
C)  Deoxyribose 
D)  Phospholipid 
E)  Phosphate 
A)  Adenine 
B)  Cytosine 
C)  Deoxyribose 
D)  Phospholipid 
E)  Phosphate

Question 4

If the DNA sequence is G- C- C- T- A- T in one polynucleotide chain, then the sequence found in the other polynucleotide chain must be

Accepted Answer

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

Question 5

When DNA polymerase encounters thymine in the parental strand, what does it add to the growing daughter strand?

Accepted Answer

A)  Adenine 
B)  Uracil 
C)  Phosphate group 
D)  Deoxyribose 
A)  Adenine 
B)  Uracil 
C)  Phosphate group 
D)  Deoxyribose

Question 6

DNA ligase is important in the replication process because it can join together segments of DNA into a single daughter strand.

Accepted Answer

A) True 
 B)False

Question 7

How many different kinds of base pairings are in DNA?

Accepted Answer

A)  Four 
B)  Millions 
C)  Two 
D)  Hundreds or thousands 
A)  Four 
B)  Millions 
C)  Two 
D)  Hundreds or thousands

Question 8

Inversions are movements of DNA from one chromosome to another.

Accepted Answer

A) True 
 B)False

Question 9

Complementary base pairs are held together by

Accepted Answer

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

Question 10

DNA breaks the hydrogen bonds between complementary base pairs during DNA replication.

Accepted Answer

The answer of DNA breaks the hydrogen bonds between complementary...

Question 11

A DNA nucleotide is made up of

Accepted Answer

A)  adenine- thymine- guanine- cytosine. 
B)  phosphate- deoxyribose- phosphate- deoxyribose. 
C)  phosphate- deoxyribose- base. 
D)  phospholipid- deoxyribose- base. 
E)  base- phosphate- glucose. 
A)  adenine- thymine- guanine- cytosine. 
B)  phosphate- deoxyribose- phosphate- deoxyribose. 
C)  phosphate- deoxyribose- base. 
D)  phospholipid- deoxyribose- base. 
E)  base- phosphate- glucose.

Question 12

Regarding the structure of DNA, which of the following is like a spiral staircase?

Accepted Answer

A)  Double helix 
B)  Covalent bonds 
C)  Hydrogen bonds 
D)  Deoxyribose 
E)  Phosphate 
A)  Double helix 
B)  Covalent bonds 
C)  Hydrogen bonds 
D)  Deoxyribose 
E)  Phosphate

Question 13

Suppose a scientist working on a new drug for cancer developed a chemical that irreversibly breaks the hydrogen bonds in the DNA molecules within cancerous cells but leaves all of the covalent bonds intact. Hydrogen bonds are relatively weak compared to covalent bonds, and they are routinely broken and reformed as the DNA molecule is replicated in a normal cell. Their stability is nonetheless critical for maintaining certain aspects of the structure and function of the DNA molecule. Based on this scenario and your knowledge of DNA, how would this newly discovered chemical affect the "mole heredity" in a human cancer cell?

Accepted Answer

A)  It would result in constant DNA replication within the cell. 
B)  It would break the individual strands of the DNA molecule apart, preventing it from functioning normally. 
C)  It would allow the DNA molecule to function normally except during replication. 
D)  It would break the two strands of the DNA molecule apart, preventing it from functioning normally. 
A)  It would result in constant DNA replication within the cell. 
B)  It would break the individual strands of the DNA molecule apart, preventing it from functioning normally. 
C)  It would allow the DNA molecule to function normally except during replication. 
D)  It would break the two strands of the DNA molecule apart, preventing it from functioning normally.

Question 14

In the comparison of a DNA molecule to a twisted ladder, the upright sides of the ladder are

Accepted Answer

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

Question 15

DNA polymerase has the ability to match the nucleotide base in the parental strand with a free nucleotide that is complementary to that base. It then forms the covalent bonds between the nucleotides in the growing daughter strand of DNA.

Accepted Answer

A) True 
 B)False

Question 16

Regarding the structure of DNA, which of the following joins deoxyribose to phosphate?

Accepted Answer

A)  Double helix 
B)  Phosphate 
C)  Hydrogen bonds 
D)  Ionic bonds 
E)  Covalent bonds 
A)  Double helix 
B)  Phosphate 
C)  Hydrogen bonds 
D)  Ionic bonds 
E)  Covalent bonds

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

Name the four types of nitrogen- containing bases in DNA. Which bases are complementary?

Accepted Answer

Adenine is complemen

Question 19

The X- ray diffraction studies of the scientists named and were essential for the discovery of the structure of the DNA molecule.

Accepted Answer

The answer of The X- ray diffraction studies of the...

Question 20

All of the following are found in DNA EXCEPT

Accepted Answer

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

Exam 12: Dna: the Molecule of Heredity

In one strand of DNA, the nucleotide sequence is 5'- A- T- G- C- 3'. The complementary sequence in the other strand must be

Hershey and Chase concluded that is the hereditary molecule by examining how radioactively labeled molecules moved between a virus and bacteria.

Based on this figure, which molecule would attach to the 5' phosphate end of the DNA strand on the right?

If the DNA sequence is G- C- C- T- A- T in one polynucleotide chain, then the sequence found in the other polynucleotide chain must be

When DNA polymerase encounters thymine in the parental strand, what does it add to the growing daughter strand?

DNA ligase is important in the replication process because it can join together segments of DNA into a single daughter strand.

How many different kinds of base pairings are in DNA?

Inversions are movements of DNA from one chromosome to another.

Complementary base pairs are held together by

DNA breaks the hydrogen bonds between complementary base pairs during DNA replication.

A DNA nucleotide is made up of

Regarding the structure of DNA, which of the following is like a spiral staircase?

In the comparison of a DNA molecule to a twisted ladder, the upright sides of the ladder are

DNA polymerase has the ability to match the nucleotide base in the parental strand with a free nucleotide that is complementary to that base. It then forms the covalent bonds between the nucleotides in the growing daughter strand of DNA.

Regarding the structure of DNA, which of the following joins deoxyribose to phosphate?

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

Name the four types of nitrogen- containing bases in DNA. Which bases are complementary?

The X- ray diffraction studies of the scientists named and were essential for the discovery of the structure of the DNA molecule.

All of the following are found in DNA EXCEPT

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

Cellular Reproduction

Meiosis: the Basis of Sexual 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 Amid 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

Energy Flow and Nutrient Cycling in Ecosystems

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

Filters