Question 1

-Using the genetic code,how many amino acids are encoded by the following sequence from the start codon and up to the stop codon? AUGCUUGACUAAGUCCCC

Accepted Answer

A)   0
B)   1
C)   2
D)   3
E)   5F)  6

Question 2

A drug that inhibits reverse transcriptase could be used to fight some viruses.

Accepted Answer

A) True 
 B)False

Question 3

The influenza virus contains an RNA genome.Scientists typically need to make a new flu vaccine every year because

Accepted Answer

A)   our bodies develop resistance to the vaccine and it becomes less effective.
B)   the virus develops resistance to the vaccine.
C)   the virus can mutate into new strains.
D)   people change their habits each year and become susceptible to different strains of the virus.
E)   the common influenza virus can come from many species of animals including cats and dogs.

Question 4

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

Accepted Answer

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

Question 5

A poly A tail is added to the mature mRNA after transcription.

Accepted Answer

A) True 
 B)False

Question 6

A gene is any DNA sequence that is transcribed to any type of RNA.

Accepted Answer

A) True 
 B)False

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.

Question 8

In DNA molecules,

Accepted Answer

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

Question 9

Proteins that initiate transcription in eukaryotes by recognizing sequences within the promoter region of a gene and attracting RNA polymerase are called:

Accepted Answer

A)   repressors
B)   inducers
C)   transcription factors
D)   TATA boxes
E)   poly A tails

Question 10

What process converts the mRNA "message" into a sequence of amino acids?

Accepted Answer

A)   transcription
B)   replication
C)   mitosis
D)   amino acid synthesis
E)   translation

Question 11

In a "frameshift" mutation

Accepted Answer

A)   the codon that mutates causes no change in the amino acid specified.
B)   the codon that mutates causes a stop codon to occur instead of the placement of an amino acid.
C)   the mutation does not occur in a codon.
D)   the mutation is caused by an addition or deletion of one or more nucleotides.
E)   the mutation is not in DNA.

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)   All answers are correct

Question 13

Changes in gene expression can be adaptive.

Accepted Answer

A) True 
 B)False

Question 14

How many codons are in the mRNA sequence GGAAUGAAACAGGAACCC?

Accepted Answer

A)   12
B)   6
C)   27
D)   9
E)   3

Question 15

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

Accepted Answer

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

Question 16

Our most potent weapon in the fight against viruses is

Accepted Answer

A)   antibiotics.
B)   sulfa drugs.
C)   gene therapy.
D)   surgery.
E)   vaccinations.

Question 17

Mutations can be caused by radiation.

Accepted Answer

A) True 
 B)False

Question 18

Mutations can be caused by errors in copying DNA.

Accepted Answer

A) True 
 B)False

Question 19

A layer of membrane attached to a virus is called

Accepted Answer

A)   an envelope.
B)   a protein coat.
C)   a chromosome.
D)   a plasmid.
E)   a nucleus.

Question 20

The rungs of the DNA ladder are formed by base pairs

Accepted Answer

A)   joined by covalent bonds.
B)   joined by hydrogen bonds.
C)   joined by ionic bonds.
D)   NOT joined to each other.

Exam 7: DNA Structure and Gene Function

A gene is any DNA sequence that is transcribed to any type of RNA.

Correct AnswerverifiedShow Answer

A layer of membrane attached to a virus is called

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In a "frameshift" mutation

Correct AnswerverifiedShow Answer

How many codons are in the mRNA sequence GGAAUGAAACAGGAACCC?

Correct AnswerverifiedShow Answer

Mutations can be caused by radiation.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A poly A tail is added to the mature mRNA after transcription.

Correct AnswerverifiedShow Answer

The rungs of the DNA ladder are formed by base pairs

Correct AnswerverifiedShow Answer

Changes in gene expression can be adaptive.

Correct AnswerverifiedShow Answer

Mutations can be caused by errors in copying DNA.

Correct AnswerverifiedShow Answer

Proteins that initiate transcription in eukaryotes by recognizing sequences within the promoter region of a gene and attracting RNA polymerase are called:

Correct AnswerverifiedShow Answer

In DNA molecules,

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A drug that inhibits reverse transcriptase could be used to fight some viruses.

Correct AnswerverifiedShow Answer

What process converts the mRNA "message" into a sequence of amino acids?

Correct AnswerverifiedShow Answer

Our most potent weapon in the fight against viruses is

Correct AnswerverifiedShow Answer

The influenza virus contains an RNA genome.Scientists typically need to make a new flu vaccine every year because

Correct AnswerverifiedShow Answer

-Using the genetic code,how many amino acids are encoded by the following sequence from the start codon and up to the stop codon? AUGCUUGACUAAGUCCCC

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified