Question 1

Initiation,elongation,and termination are the three main steps in

Accepted Answer

A)  translation only.
B)  transcription and translation.
C)  transcription only.
D)  photosynthesis.E) A) and B)
F) A) and C)

Question 2

Which of the following is conducted by both prokaryotes and eukaryotes during protein synthesis?

Accepted Answer

A)  Transcription starts at a promoter on the DNA.
B)  Introns are removed from the mRNA.
C)  Transcription occurs in the nucleus.
D)  All answers are correct.
E)  Some mRNA molecules are degraded and never translated.F) A) and B)
G) A) and C)

Question 3

Viruses

Accepted Answer

A)  consist of only a single cell.
B)  are smaller than cells.
C)  consist of multiple cells.
D)  contain a nucleus.
E)  contain ribosomes.F) A) and B)
G) B) and E)

Question 4

What is the role of DNA in living things?

Accepted Answer

A)  DNA stores the information required to make proteins.
B)  DNA produces food for cells.
C)  DNA produces energy for cells.
D)  DNA directs the production of proteins.E) All of the above
F) B) and C)

Question 5

The type of RNA that delivers amino acids to the ribosome during protein synthesis is tRNA.

Accepted Answer

A) True 
 B)False

Question 6

A highly-wound circle of RNA without a protein coat is a

Accepted Answer

A)  virus.
B)  virion.
C)  viroid.
D)  prion.
E)  prophagE.F) B) and E)
G) None of the above

Question 7

The enzyme that HIV uses to convert its RNA into DNA is

Accepted Answer

A)  reverse transcriptase.
B)  DNA polymerase.
C)  RNA polymerase.
D)  RNA integrase.
E)  translasE.F) A) and E)
G) B) and E)

Question 8

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.F) A) and B)
G) A) and E)

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

In prokaryotic cells,gene expression is regulated by preventing mRNA from exiting the nucleus.

Accepted Answer

A) True 
 B)False

Question 11

A DNA sequence that signals the start of a gene is

Accepted Answer

A)  a codon.
B)  an anticodon.
C)  a terminator.
D)  a promoter.
E)  an amino acid attachment sitE.F) All of the above
G) C) and E)

Question 12

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

Accepted Answer

A)  insertion
B)  substitution
C)  deletion
D)  frameshiftE) All of the above
F) None of the above

Question 13

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) A) and B)
F) All of the above

Question 14

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%F) A) and D)
G) B) and D)

Question 15

All prokaryotic DNA is transcribed,but not all eukaryotic DNA is transcribed.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following diseases is NOT caused by viruses?

Accepted Answer

A)  the common cold and influenza
B)  smallpox and mononucleosis
C)  polio and rabies
D)  AIDS and warts
E)  diabetesF) A) and B)
G) A) and C)

Question 17

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 point mutation,Val to Glu
B)  a frame shift
C)  addition of a new stop codon
D)  a point mutation,Glu to ValE) A) and B)
F) A) and C)

Question 18

In the section "Investigating Life: Clues to the Origin 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.F) None of the above
G) C) and D)

Question 19

Using the genetic code,what is the sequence of amino acids represented by the codons AUGUCAACGUGA?

Accepted Answer

A)  Met,Ser,Thr,(Stop) 
B)  Tyr,Ser,Cys,Thr
C)  Ser,Tyr,Leu,Val
D)  Met,Val,Asp,MetE) A) and D)
F) All of the above

Question 20

Cystic fibrosis may be caused by a protein that does not fold correctly.

Accepted Answer

A) True 
 B)False

Exam 7: DNA Structure and Gene Function

In prokaryotic cells,gene expression is regulated by preventing mRNA from exiting the nucleus.

Correct AnswerverifiedShow Answer

The enzyme that HIV uses to convert its RNA into DNA is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Initiation,elongation,and termination are the three main steps in

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Clues to the Origin of Language",FOXP2 sequences differed the most between mice and _____.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A highly-wound circle of RNA without a protein coat is a

Correct AnswerverifiedShow Answer

What is the role of DNA in living things?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A DNA sequence that signals the start of a gene is

Correct AnswerverifiedShow Answer

Using the genetic code,what is the sequence of amino acids represented by the codons AUGUCAACGUGA?

Correct AnswerverifiedShow Answer

The type of RNA that delivers amino acids to the ribosome during protein synthesis is tRNA.

Correct AnswerverifiedShow Answer

Which of the following diseases is NOT caused by viruses?

Correct AnswerverifiedShow Answer

Which of the following is conducted by both prokaryotes and eukaryotes during protein synthesis?

Correct AnswerverifiedShow Answer

All prokaryotic DNA is transcribed,but not all eukaryotic DNA is transcribed.

Correct AnswerverifiedShow Answer

The "Central Dogma" of molecular biology described by Watson and Crick describes

Correct AnswerverifiedShow Answer

Viruses

Correct AnswerverifiedShow Answer

Cystic fibrosis may be caused by a protein that does not fold correctly.

Correct AnswerverifiedShow Answer

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