Question 1

In a DNA molecule,hydrogen bonds link the

Accepted Answer

A)  complementary nitrogenous bases, thus keeping the two strands of DNA parallel to each other. 
B)  two strands of DNA end to end during transcription and translation. 
C)  two strands of DNA end to end during transcription only. 
D)  complementary deoxyribose sugars, thus maintaining a separation between the two DNA strands. 
A)  complementary nitrogenous bases, thus keeping the two strands of DNA parallel to each other. 
B)  two strands of DNA end to end during transcription and translation. 
C)  two strands of DNA end to end during transcription only. 
D)  complementary deoxyribose sugars, thus maintaining a separation between the two DNA strands. A

Question 2

HIV

Accepted Answer

A)  is a retrovirus. 
B)  infects most mammals. 
C)  can be killed with antibiotics. 
D)  causes liver cancer. 
E)  can be transmitted through the skin. 
A)  is a retrovirus. 
B)  infects most mammals. 
C)  can be killed with antibiotics. 
D)  causes liver cancer. 
E)  can be transmitted through the skin. A

Question 3

If the DNA in a cell consists of 20% adenine,then it will also contain ________ guanine.

Accepted Answer

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

Question 4

How does the spread of viruses differ between plants and animals?

Accepted Answer

A)  Viruses must penetrate through cell walls of plant cells and not animal cells. 
B)  Viruses spread faster in plants than animals because of photosynthesis. 
C)  Viruses do not spread to plants, only animals. 
D)  Viruses spread more slowly in plants than animals because of photosynthesis. 
E)  Viruses that affect plants are all DNA viruses. 
A)  Viruses must penetrate through cell walls of plant cells and not animal cells. 
B)  Viruses spread faster in plants than animals because of photosynthesis. 
C)  Viruses do not spread to plants, only animals. 
D)  Viruses spread more slowly in plants than animals because of photosynthesis. 
E)  Viruses that affect plants are all DNA viruses.

Question 5

Viruses often spread from plant to plant by plant eating insects who physically injure the plant while eating the plant. What probably prevents viruses from easily entering plant cells?

Accepted Answer

A)  the virus' cell walls 
B)  the plant's plasma membrane 
C)  the plant's cell wall 
D)  the virus' plasma membrane 
E)  the virus' protein coat 
A)  the virus' cell walls 
B)  the plant's plasma membrane 
C)  the plant's cell wall 
D)  the virus' plasma membrane 
E)  the virus' protein coat

Question 6

In the lac operon,the protein that binds to the operator to prevent transcription is

Accepted Answer

A)  the repressor. 
B)  RNA polymerase. 
C)  DNA polymerase. 
D)  the promoter. 
E)  lactose. 
A)  the repressor. 
B)  RNA polymerase. 
C)  DNA polymerase. 
D)  the promoter. 
E)  lactose.

Question 7

In DNA,T binds to G.

Accepted Answer

A) True 
 B)False

Question 8

A gene is an RNA sequence that is transcribed to mRNA only.

Accepted Answer

A) True 
 B)False

Question 9

The DNA sequence ATGCATGC will pair with which of the following RNA strands?

Accepted Answer

A)  UACGUACG 
B)  CGAUCGAU 
C)  AUGCAUGC 
D)  TAGCTAGC 
E)  UAGCTAGC 
A)  UACGUACG 
B)  CGAUCGAU 
C)  AUGCAUGC 
D)  TAGCTAGC 
E)  UAGCTAGC

Question 10

The length of a DNA sequence is ________ the mature mRNA transcribed from it because ________.

Accepted Answer

A)  shorter than; the mature mRNA does not contain exons 
B)  equal to; the mature mRNA was transcribed from the DNA sequence 
C)  longer than; the mature mRNA does not contain introns 
D)  shorter than; each codon of three bases encodes only one amino acid 
E)  longer than; each codon of one amino acid encodes three bases 
A)  shorter than; the mature mRNA does not contain exons 
B)  equal to; the mature mRNA was transcribed from the DNA sequence 
C)  longer than; the mature mRNA does not contain introns 
D)  shorter than; each codon of three bases encodes only one amino acid 
E)  longer than; each codon of one amino acid encodes three bases

Question 11

The double helix of DNA is composed of building blocks called

Accepted Answer

A)  amino acids. 
B)  monosaccharides. 
C)  phospholipids. 
D)  disaccharides. 
E)  nucleotides. 
A)  amino acids. 
B)  monosaccharides. 
C)  phospholipids. 
D)  disaccharides. 
E)  nucleotides.

Question 12

RNA differs from DNA in many ways,including

Accepted Answer

A)  DNA contains deoxyribose while RNA contains ribose. 
B)  DNA contains thymine while RNA contains uracil. 
C)  DNA is double stranded while RNA is single stranded. 
D)  RNA can catalyze some chemical reactions and DNA cannot. 
E)  All answers are correct. 
A)  DNA contains deoxyribose while RNA contains ribose. 
B)  DNA contains thymine while RNA contains uracil. 
C)  DNA is double stranded while RNA is single stranded. 
D)  RNA can catalyze some chemical reactions and DNA cannot. 
E)  All answers are correct.

Question 13

"Mad cow disease" is caused by a viroid.

Accepted Answer

A) True 
 B)False

Question 14

In a "silent" mutation,the

Accepted Answer

A)  codon that mutates causes a change in the amino acid specified. 
B)  codon that mutates does not cause a change in the amino acid specified. 
C)  codon that mutates causes a stop codon to occur instead of the placement of an amino acid. 
D)  mutation does not occur in a codon. 
E)  mutation is not in DNA. 
A)  codon that mutates causes a change in the amino acid specified. 
B)  codon that mutates does not cause a change in the amino acid specified. 
C)  codon that mutates causes a stop codon to occur instead of the placement of an amino acid. 
D)  mutation does not occur in a codon. 
E)  mutation is not in DNA.

Question 15

-Using the genetic code,predict what type of mutation has occurred in the hemoglobin sickle cell anemia allele. Normal allele GGAAUGAAACAGGAACCC
Mutant allele GGAAUGAAACAGGUACCC

Accepted Answer

A)  a substitution mutation, Val to Glu 
B)  a frame shift mutation, Val to Glu 
C)  addition of a new stop codon 
D)  a substitution mutation, Glu to Val 
E)  a frame shift mutation, Glu to Val 
A)  a substitution mutation, Val to Glu 
B)  a frame shift mutation, Val to Glu 
C)  addition of a new stop codon 
D)  a substitution mutation, Glu to Val 
E)  a frame shift mutation, Glu to Val

Question 16

Only one of the two strands of DNA is transcribed because

Accepted Answer

A)  RNA polymerase binds to the promoter, initiating transcription on only one strand of DNA. 
B)  the start of transcription is random along the chromosome and does not always occur on a gene. 
C)  RNA polymerase binds to the terminator, stopping transcription on one strand of DNA. 
D)  both strands are transcribed, but only one strand of DNA contains a reading frame. 
E)  DNA consists of only one strand in the nucleus of the cell. 
A)  RNA polymerase binds to the promoter, initiating transcription on only one strand of DNA. 
B)  the start of transcription is random along the chromosome and does not always occur on a gene. 
C)  RNA polymerase binds to the terminator, stopping transcription on one strand of DNA. 
D)  both strands are transcribed, but only one strand of DNA contains a reading frame. 
E)  DNA consists of only one strand in the nucleus of the cell.

Question 17

The correct sequence of stages of viral replication is

Accepted Answer

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

Question 18

The DNA sequence ATGCATGC will pair with which of the following DNA strands?

Accepted Answer

A)  TACGTACG 
B)  TACCTACC 
C)  ATGCATGC 
D)  TTGCATCC 
E)  CGTACGTA 
A)  TACGTACG 
B)  TACCTACC 
C)  ATGCATGC 
D)  TTGCATCC 
E)  CGTACGTA

Question 19

What type of RNA carries the information that specifies a protein?

Accepted Answer

A)  transfer RNA 
B)  ribosomal RNA 
C)  messenger RNA 
D)  double-stranded RNA 
E)  complementary RNA 
A)  transfer RNA 
B)  ribosomal RNA 
C)  messenger RNA 
D)  double-stranded RNA 
E)  complementary RNA

Question 20

What type of mutation occurred in the following? Normal allele GGAAUGAAACAGGAACCC
Mutant allele GGAAUGAAACAGGUACCC

Accepted Answer

A)  substitution 
B)  insertion 
C)  deletion 
D)  frameshift 
E)  No answer is correct. 
A)  substitution 
B)  insertion 
C)  deletion 
D)  frameshift 
E)  No answer is correct.

Exam 7: DNA Structure and Gene Function

In a DNA molecule,hydrogen bonds link the

HIV

If the DNA in a cell consists of 20% adenine,then it will also contain ________ guanine.

How does the spread of viruses differ between plants and animals?

Viruses often spread from plant to plant by plant eating insects who physically injure the plant while eating the plant. What probably prevents viruses from easily entering plant cells?

In the lac operon,the protein that binds to the operator to prevent transcription is

In DNA,T binds to G.

A gene is an RNA sequence that is transcribed to mRNA only.

The DNA sequence ATGCATGC will pair with which of the following RNA strands?

The length of a DNA sequence is ________ the mature mRNA transcribed from it because ________.

The double helix of DNA is composed of building blocks called

RNA differs from DNA in many ways,including

"Mad cow disease" is caused by a viroid.

In a "silent" mutation,the

-Using the genetic code,predict what type of mutation has occurred in the hemoglobin sickle cell anemia allele. Normal allele GGAAUGAAACAGGAACCC Mutant allele GGAAUGAAACAGGUACCC

Only one of the two strands of DNA is transcribed because

The correct sequence of stages of viral replication is

The DNA sequence ATGCATGC will pair with which of the following DNA strands?

What type of RNA carries the information that specifies a protein?

What type of mutation occurred in the following? Normal allele GGAAUGAAACAGGAACCC Mutant allele GGAAUGAAACAGGUACCC

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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The length of a DNA sequence is the mature mRNA transcribed from it because .