Question 1

During replication DNA is synthesized by _____.

Accepted Answer

A)  DNA polymerase
B)  RNA polymerase
C)  ribosomes
D)  ribozymes

Question 2

Pyrimidine dimers are a type of mutation most commonly caused by:

Accepted Answer

A)  alkylating agents
B)  deaminating agents
C)  ultraviolet light
D)  acridine

Question 3

Which of the following statements is true

Accepted Answer

A)  During DNA replication the leading strand serves as template for replication of lagging strand.
B)  Fragments on the lagging strand are joined together by DNA ligase.
C)  A bacterial chromosome is made up of individual units called Okazaki fragments.
D)  Two strands of double helix combine by base pairing in a parallel fashion.

Question 4

Which statement is true

Accepted Answer

A)  Proofreading that occurs during transcription changes the RNA into DNA.
B)  Translation is a less accurate process than transcription.
C)  Reverse transcription is a less accurate process than regular transcription.
D)  Errors in replication can be proofread during transcription.

Question 5

After DNA replication of a bacterial chromosome,the new DNA contains:

Accepted Answer

A)  2 newly synthesized strands of DNA copied from the original parent strands
B)  one strand of parent DNA along with one newly synthesized strand
C)  small segments of parent DNA interspersed with newly synthesized segments of DNA
D)  two of these choices are true

Question 6

Replication results in the formation of what type of new molecule

Accepted Answer

A)  DNA
B)  RNA
C)  Protein
D)  Lipid

Question 7

Organisms that have lost the ability to synthesize a particular enzyme and which require certain nutrients to be added to their medium to maintain growth are termed:

Accepted Answer

A)  phototrophs
B)  auxotrophs
C)  prototrophs
D)  autotrophs

Question 8

Polymerase chain reaction:

Accepted Answer

A)  allows for the rapid amplification of a billion copies of DNA without needing a living cell
B)  can be applied to historic samples and to criminal investigations
C)  requires oligonucleotides to cut DNA into smaller pieces
D)  two of the above are true

Question 9

In the lactose operon,which of the following is a protein

Accepted Answer

A)  Repressor
B)  Operator
C)  Regulator
D)  Promoter

Question 10

During DNA replication:

Accepted Answer

A)  the leading strand is synthesized in the 3' to 5' direction
B)  the leading strand is synthesized discontinuously
C)  the lagging strand is synthesized in the 5' to 3' direction
D)  both strands are synthesized discontinuously

Question 11

This molecule is used in the process of _____.

Accepted Answer

A)  DNA replication
B)  mitosis
C)  meiosis
D)  protein synthesis

Question 12

The information carried by DNA is used to create a ________ which then moves to the ribosome for protein synthesis.

Accepted Answer

A)  tRNA
B)  rRNA
C)  siRNA
D)  mRNA

Question 13

In eukaryotes,transcription takes place in the ________ while translation takes place in the ________.

Accepted Answer

A)  nucleus,nucleus
B)  nucleus,cytoplasm
C)  cytoplasm,nucleus
D)  cytoplasm,cytoplasm

Question 14

Genes with different information at the same locus are called _____.

Accepted Answer

A)  chromosomes
B)  homologs
C)  plasmids
D)  alleles

Question 15

When an E.coli cell contains high levels of lactose,the lactose will bind with the _____.

Accepted Answer

A)  repressor
B)  operator
C)  promoter
D)  RNA polymerase

Question 16

Photoreactivation:

Accepted Answer

A)  repairs dimers in DNA using an endonuclease
B)  uses light to activate repair enzymes
C)  removes alkylating agents from bases
D)  occurs when UV light causes mutations in DNA

Question 17

Amino acids move from the cytoplasm to the ribosome with the help of _____.

Accepted Answer

A)  mRNAs
B)  tRNAs
C)  siRNAs
D)  rRNAs

Question 18

Mutagens such as 5-bromouracil cause mutations by:

Accepted Answer

A)  substituting for one of the bases normally found in DNA
B)  adding an alkyl group to a nucleotide
C)  removing an amino group from a nucleotide
D)  causing breaks in chromosomes

Question 19

Which of the following statements about the genetic code is true

Accepted Answer

A)  The first position of a codon determines the amino acid.
B)  An amino acid can be specified for by more than one codon.
C)  Nonsense codons contain no information.
D)  Because DNA only contains four letters there are very few number of possible genes that can exist.

Question 20

________ refers to the specific characteristics displayed by an organism.

Accepted Answer

A)  Genotype
B)  Mutation
C)  Phenotype
D)  Genes

Exam 8: Microbial Genetics

In eukaryotes,transcription takes place in the ________ while translation takes place in the ________.

Correct AnswerverifiedShow Answer

Organisms that have lost the ability to synthesize a particular enzyme and which require certain nutrients to be added to their medium to maintain growth are termed:

Correct AnswerverifiedShow Answer

Amino acids move from the cytoplasm to the ribosome with the help of _____.

Correct AnswerverifiedShow Answer

Which statement is true

Correct AnswerverifiedShow Answer

The information carried by DNA is used to create a ________ which then moves to the ribosome for protein synthesis.

Correct AnswerverifiedShow Answer

Pyrimidine dimers are a type of mutation most commonly caused by:

Correct AnswerverifiedShow Answer

________ refers to the specific characteristics displayed by an organism.

Correct AnswerverifiedShow Answer

Mutagens such as 5-bromouracil cause mutations by:

Correct AnswerverifiedShow Answer

After DNA replication of a bacterial chromosome,the new DNA contains:

Correct AnswerverifiedShow Answer

This molecule is used in the process of _____.

Correct AnswerverifiedShow Answer

In the lactose operon,which of the following is a protein

Correct AnswerverifiedShow Answer

During DNA replication:

Correct AnswerverifiedShow Answer

When an E.coli cell contains high levels of lactose,the lactose will bind with the _____.

Correct AnswerverifiedShow Answer

Photoreactivation:

Correct AnswerverifiedShow Answer

Which of the following statements is true

Correct AnswerverifiedShow Answer

Which of the following statements about the genetic code is true

Correct AnswerverifiedShow Answer

Genes with different information at the same locus are called _____.

Correct AnswerverifiedShow Answer

Polymerase chain reaction:

Correct AnswerverifiedShow Answer

Replication results in the formation of what type of new molecule

Correct AnswerverifiedShow Answer

During replication DNA is synthesized by _____.

Correct AnswerverifiedShow Answer

In eukaryotes,transcription takes place in the while translation takes place in the .

Correct Answer
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