Question 1

An infectious protein is a

Accepted Answer

A)  virus. 
B)  viroid. 
C)  prion. 
D)  virion. 
E)  prophage. 
A)  virus. 
B)  viroid. 
C)  prion. 
D)  virion. 
E)  prophage.

Question 2

If genetic tests showed that a tomato plant had viral DNA integrated into its chromosomes without outward symptoms caused by the virus,you could say that the tomato plant had

Accepted Answer

A)  a rare form of viral infection. 
B)  a transgenic infection. 
C)  a lytic infection. 
D)  a systematic infection. 
E)  a lysogenic infection. 
A)  a rare form of viral infection. 
B)  a transgenic infection. 
C)  a lytic infection. 
D)  a systematic infection. 
E)  a lysogenic infection.

Question 3

In eukaryotic cells,sequences of mRNA removed before translation are called

Accepted Answer

A)  introns. 
B)  anticodons. 
C)  exons. 
D)  rRNA. 
E)  terminators. 
A)  introns. 
B)  anticodons. 
C)  exons. 
D)  rRNA. 
E)  terminators.

Question 4

In studies of the genetic basis of language,FOXP2 sequences differed the most between mice and

Accepted Answer

A)  rhesus monkeys. 
B)  gorillas. 
C)  chimpanzees. 
D)  humans. 
E)  All answers are correct. 
A)  rhesus monkeys. 
B)  gorillas. 
C)  chimpanzees. 
D)  humans. 
E)  All answers are correct.

Question 5

The stage of viral replication in which the host cell produces viral nucleic acids and proteins is

Accepted Answer

A)  release. 
B)  attachment. 
C)  synthesis. 
D)  penetration. 
E)  assembly. 
A)  release. 
B)  attachment. 
C)  synthesis. 
D)  penetration. 
E)  assembly.

Question 6

Oral infections with herpes simplex virus 1 can lie dormant in nerve cells for years.When a patient becomes stressed the virus is released,forming cold sores on the lips.Why would the virus form a cold sore?

Accepted Answer

A)  to spread to a new host 
B)  so that it can mutate and survive antibiotic treatment 
C)  to become latent in the body 
D)  to avoid the immune system 
E)  to warn other people that the host is infected 
A)  to spread to a new host 
B)  so that it can mutate and survive antibiotic treatment 
C)  to become latent in the body 
D)  to avoid the immune system 
E)  to warn other people that the host is infected

Question 7

Many viruses are inhibited by antibiotics.

Accepted Answer

A) True 
 B)False

Question 8

If the DNA in a cell consists of 20% adenine,it will also have ________ thymine.

Accepted Answer

A)  30% 
B)  80% 
C)  40% 
D)  20% 
E)  10% 
A)  30% 
B)  80% 
C)  40% 
D)  20% 
E)  10%

Question 9

In DNA molecules,

Accepted Answer

A)  cytosine pairs with adenine. 
B)  thymine pairs with uracil. 
C)  adenine pairs with uracil. 
D)  adenine pairs with thymine. 
E)  cytosine pairs with thymine. 
A)  cytosine pairs with adenine. 
B)  thymine pairs with uracil. 
C)  adenine pairs with uracil. 
D)  adenine pairs with thymine. 
E)  cytosine pairs with thymine.

Question 10

The stage of viral replication in which the new viruses leave the host cell is

Accepted Answer

A)  release. 
B)  attachment. 
C)  penetration. 
D)  synthesis. 
E)  assembly. 
A)  release. 
B)  attachment. 
C)  penetration. 
D)  synthesis. 
E)  assembly.

Question 11

Mutations can be caused by chemicals.

Accepted Answer

A) True 
 B)False

Question 12

Oral infections with herpes simplex virus 1 can lie dormant in nerve cells for years.When a patient becomes stressed,the virus is released,forming cold sores on the lips.While lying dormant,the virus is in which of the following states?

Accepted Answer

A)  lytic 
B)  symptomatic 
C)  latent 
D)  replicative 
E)  infective 
A)  lytic 
B)  symptomatic 
C)  latent 
D)  replicative 
E)  infective

Question 13

One key reason why viruses are not considered living organisms is

Accepted Answer

A)  viruses do not contain genetic information. 
B)  viruses do not reproduce on their own. 
C)  viruses are all smaller than the smallest known cells. 
D)  viruses do not contain a nucleus. 
E)  viruses can be frozen and still survive. 
A)  viruses do not contain genetic information. 
B)  viruses do not reproduce on their own. 
C)  viruses are all smaller than the smallest known cells. 
D)  viruses do not contain a nucleus. 
E)  viruses can be frozen and still survive.

Question 14

A three-base sequence (loop)in tRNA that is complementary to a three-base sequence in mRNA is

Accepted Answer

A)  a codon. 
B)  an anticodon. 
C)  a promoter. 
D)  a terminator. 
E)  an amino acid attachment site. 
A)  a codon. 
B)  an anticodon. 
C)  a promoter. 
D)  a terminator. 
E)  an amino acid attachment site.

Question 15

HIV is a

Accepted Answer

A)  double-stranded DNA virus. 
B)  single-stranded RNA virus. 
C)  single-stranded DNA virus. 
D)  double-stranded RNA virus. 
E)  prion. 
A)  double-stranded DNA virus. 
B)  single-stranded RNA virus. 
C)  single-stranded DNA virus. 
D)  double-stranded RNA virus. 
E)  prion.

Question 16

In the bacterium E.coli,a repressor protein binds to the operator region of the DNA in the absence of lactose,thus preventing the transcription of the genes of the lactose operon.

Accepted Answer

A) True 
 B)False

Question 17

Amanatin is a toxin found in the death cap mushroom,Amanita phalloides.It inhibits RNA polymerase,thus blocking

Accepted Answer

A)  transcription. 
B)  translation. 
C)  replication. 
D)  cell division. 
E)  RNA splicing. 
A)  transcription. 
B)  translation. 
C)  replication. 
D)  cell division. 
E)  RNA splicing.

Question 18

Where is the majority of DNA located in a human cell?

Accepted Answer

A)  nucleus 
B)  mitochondrion 
C)  chloroplast 
D)  ribosome 
A)  nucleus 
B)  mitochondrion 
C)  chloroplast 
D)  ribosome

Question 19

If E.coli bacteria are grown in the absence of lactose

Accepted Answer

A)  the repressor will not bind the operator, thus allowing transcription of the lac operon genes. 
B)  the repressor will bind the operator, thus allowing transcription of the lac operon genes. 
C)  the repressor will not bind the operator, thus preventing transcription of the lac operon genes. 
D)  the repressor will bind the operator, thus preventing transcription of the lac operon genes. 
E)  No answer is correct. 
A)  the repressor will not bind the operator, thus allowing transcription of the lac operon genes. 
B)  the repressor will bind the operator, thus allowing transcription of the lac operon genes. 
C)  the repressor will not bind the operator, thus preventing transcription of the lac operon genes. 
D)  the repressor will bind the operator, thus preventing transcription of the lac operon genes. 
E)  No answer is correct.

Question 20

The "central dogma" of molecular biology described by Watson and Crick describes

Accepted Answer

A)  the passing of genetic information from DNA to RNA by translation. 
B)  the passing of genetic information from RNA to protein by transcription. 
C)  the inheritance of traits between generations. 
D)  the production of energy in a cell. 
E)  the directional flow of genetic information in cells. 
A)  the passing of genetic information from DNA to RNA by translation. 
B)  the passing of genetic information from RNA to protein by transcription. 
C)  the inheritance of traits between generations. 
D)  the production of energy in a cell. 
E)  the directional flow of genetic information in cells.

Exam 7: DNA Structure and Gene Function

An infectious protein is a

If genetic tests showed that a tomato plant had viral DNA integrated into its chromosomes without outward symptoms caused by the virus,you could say that the tomato plant had

In eukaryotic cells,sequences of mRNA removed before translation are called

In studies of the genetic basis of language,FOXP2 sequences differed the most between mice and

The stage of viral replication in which the host cell produces viral nucleic acids and proteins is

Oral infections with herpes simplex virus 1 can lie dormant in nerve cells for years.When a patient becomes stressed the virus is released,forming cold sores on the lips.Why would the virus form a cold sore?

Many viruses are inhibited by antibiotics.

If the DNA in a cell consists of 20% adenine,it will also have ________ thymine.

In DNA molecules,

The stage of viral replication in which the new viruses leave the host cell is

Mutations can be caused by chemicals.

Oral infections with herpes simplex virus 1 can lie dormant in nerve cells for years.When a patient becomes stressed,the virus is released,forming cold sores on the lips.While lying dormant,the virus is in which of the following states?

One key reason why viruses are not considered living organisms is

A three-base sequence (loop)in tRNA that is complementary to a three-base sequence in mRNA is

HIV is a

In the bacterium E.coli,a repressor protein binds to the operator region of the DNA in the absence of lactose,thus preventing the transcription of the genes of the lactose operon.

Amanatin is a toxin found in the death cap mushroom,Amanita phalloides.It inhibits RNA polymerase,thus blocking

Where is the majority of DNA located in a human cell?

If E.coli bacteria are grown in the absence of lactose

The "central dogma" of molecular biology described by Watson and Crick describes

The Scientific Study of Life

The Chemistry of Life

Cells

The Energy of Life

Photosynthesis

Respiration and Fermentation

DNA Replication,Binary Fission,and Mitosis

Sexual Reproduction and Meiosis

Patterns of Inheritance

DNA Technology

Forces of Evolutionary Change

Evidence of Evolution

Speciation and Extinction

Evolution and Diversity of Microbial Life

Evolution and Diversity of Plants

Evolution and Diversity of Animals

Populations

Communities and Ecosystems

Preserving Biodiversity

Plant Form and Function

Reproduction and Development of Flowering Plants

Animal Tissues and Organ Systems

The Nervous System and the Senses

The Endocrine System

The Skeletal and Muscular Systems

The Circulatory and Respiratory Systems

The Digestive and Urinary Systems

The Immune System

Animal Reproduction and Development

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