Question 1

Compare and contrast the components and specific regulatory events of the lac operon and the arg operon.

Accepted Answer

The lac operon and the arg operon are bo...

Question 2

A screening system called the _____ test is used for detecting chemicals with carcinogenic potential.

Accepted Answer

The answer of A screening system called the _____ test...

Question 3

In Griffith's experiments with Streptococcus pneumonia rough non-encapsulated Streptococci were converted into to smooth encapsulated Streptococci in the presence of the heat killed smooth encapsulated Streptococci.What is the term that describes this process?

Accepted Answer

A)  transduction
B)  conjugation
C)  transformation
D)  cloningE) None of the above
F) B) and D)

Question 4

Compare and contrast the characteristics of genetic material, including its chemical structure, organization, and packaging found in eukaryotes, prokaryotes, and viruses.

Accepted Answer

Genetic material in eukaryotes, prokaryo...

Question 5

In bacteria, initiator tRNA carries formyl methionine.

Accepted Answer

A) True 
 B)False

Question 6

Which is incorrect about pyrimidines?

Accepted Answer

A)  are only found in DNA, not in RNA
B)  they are always paired with a specific purine
C)  they include cytosine and thymine
D)  they are found within nucleotides
E)  they are nitrogenous bases theyF) B) and D)
G) A) and D)

Question 7

Synthesis of an inducible enzyme requires

Accepted Answer

A)  repressor alone bound to operator.
B)  substrate bound to repressor.
C)  substrate bound to promoter.
D)  corepressor and repressor binding to the operator.
E)  None of the choices are correct.F) B) and E)
G) C) and D)

Question 8

Repressible operons require that a _____ bind to the repressor protein before it can bind to the operator.

Accepted Answer

The answer of Repressible operons require that a _____ bind...

Question 9

The DNA of microorganisms is made up of subunits called

Accepted Answer

A)  histones.
B)  amino acids.
C)  nucleotides.
D)  mRNA.
E)  polymerases.F) B) and E)
G) A) and D)

Question 10

The following pertain to ribosomes during protein synthesis, except they:

Accepted Answer

A)  contain codons within their rRNA molecules.
B)  participate only in translation.
C)  bind to the 5' end of mRNA by their small subunit.
D)  use their large subunit to supply enzymes for peptide bonding.
E)  shift to the right along the mRNA strand from one codon to the next.F) D) and E)
G) B) and E)

Question 11

Viruses with DNA for their nucleic acid can have either double-stranded DNA or single-stranded DNA.

Accepted Answer

A) True 
 B)False

Question 12

A mutation that changes a normal codon to a stop codon is called a

Accepted Answer

A)  point mutation.
B)  silent mutation.
C)  back mutation.
D)  missense mutation.
E)  nonsense mutation.F) C) and E)
G) C) and D)

Question 13

The development of virulent, toxin-producing bacterial strains due to the presence of a temperate phage can occur in

Accepted Answer

A)  bacterial conjugation.
B)  transformation.
C)  generalized transduction.
D)  specialized transduction.
E)  All of the choices are correct.F) A) and E)
G) C) and D)

Question 14

Which enzyme is mismatched with its function in DNA replication?

Accepted Answer

A)  gyrase - supercoiling DNA
B)  RNA polymerase - synthesizes RNA primers
C)  ligase - final sealing of DNA nicks in DNA
D)  DNA polymerase I - removes primer
E)  DNA polymerase III - Adding bases to the new DNA chainF) A) and E)
G) B) and E)

Question 15

The _____ is all of the genetic material of a cell.

Accepted Answer

The answer of The _____ is all of the genetic...

Question 16

The enzymes that help pack DNA into the cell by coiling the DNA into a tight bundle are

Accepted Answer

A)  DNA ligases.
B)  DNA polymerases.
C)  DNA helicases.
D)  DNA gyrases.
E)  primases.F) B) and C)
G) C) and E)

Question 17

Repressible operons are normally in the on mode in the cell.

Accepted Answer

A) True 
 B)False

Question 18

DNA photolyase, in the presence of visible light, can repair DNA damage due to ultraviolet radiation.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following is incorrect about animal viruses?

Accepted Answer

A)  viral mRNA is translated on host cell ribosomes
B)  replication of viral RNA occurs in the host nucleus
C)  host tRNA's are used in viral translation
D)  host DNA polymerase often participates in viral DNA replication
E)  oncogenic viruses integrate their DNA into host DNA and can initiate cancerF) A) and E)
G) C) and D)

Question 20

The smallest unit of heredity is a chromosome.

Accepted Answer

A) True 
 B)False

Exam 9: Microbial Genetics

Which enzyme is mismatched with its function in DNA replication?

Correct AnswerverifiedShow Answer

The DNA of microorganisms is made up of subunits called

Correct AnswerverifiedShow Answer

Viruses with DNA for their nucleic acid can have either double-stranded DNA or single-stranded DNA.

Correct AnswerverifiedShow Answer

The following pertain to ribosomes during protein synthesis, except they:

Correct AnswerverifiedShow Answer

Compare and contrast the characteristics of genetic material, including its chemical structure, organization, and packaging found in eukaryotes, prokaryotes, and viruses.

Correct AnswerAnswered by ExamLex AIGenetic material in eukaryotes, prokaryo...View AnswerShow Answer

In Griffith's experiments with Streptococcus pneumonia rough non-encapsulated Streptococci were converted into to smooth encapsulated Streptococci in the presence of the heat killed smooth encapsulated Streptococci.What is the term that describes this process?

Correct AnswerverifiedShow Answer

In bacteria, initiator tRNA carries formyl methionine.

Correct AnswerverifiedShow Answer

A screening system called the _____ test is used for detecting chemicals with carcinogenic potential.

Correct AnswerverifiedShow Answer

The enzymes that help pack DNA into the cell by coiling the DNA into a tight bundle are

Correct AnswerverifiedShow Answer

Which of the following is incorrect about animal viruses?

Correct AnswerverifiedShow Answer

The smallest unit of heredity is a chromosome.

Correct AnswerverifiedShow Answer

Repressible operons are normally in the on mode in the cell.

Correct AnswerverifiedShow Answer

The development of virulent, toxin-producing bacterial strains due to the presence of a temperate phage can occur in

Correct AnswerverifiedShow Answer

Repressible operons require that a _____ bind to the repressor protein before it can bind to the operator.

Correct AnswerverifiedShow Answer

Compare and contrast the components and specific regulatory events of the lac operon and the arg operon.

Correct AnswerAnswered by ExamLex AIThe lac operon and the arg operon are bo...View AnswerShow Answer

Which is incorrect about pyrimidines?

Correct AnswerverifiedShow Answer

A mutation that changes a normal codon to a stop codon is called a

Correct AnswerverifiedShow Answer

Synthesis of an inducible enzyme requires

Correct AnswerverifiedShow Answer

DNA photolyase, in the presence of visible light, can repair DNA damage due to ultraviolet radiation.

Correct AnswerverifiedShow Answer

The _____ is all of the genetic material of a cell.

Correct AnswerverifiedShow Answer

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Genetic material in eukaryotes, prokaryo...
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Answered by ExamLex AI
The lac operon and the arg operon are bo...
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