Question 1

During replication,each parent DNA strand serves as a _____ for synthesis of new DNA strands.

Accepted Answer

A)  copy point
B)  template
C)  comparison molecule
D)  scaffold
E)  reservoirF) None of the above
G) A) and B)

Question 2

RNA polymerase binds to the

Accepted Answer

A)  start codon.
B)  termination sequence.
C)  regulation sequence.
D)  promoter sequence.E) A) and B)
F) None of the above

Question 3

Which of the following is not associated with a prokaryotic ribosome?

Accepted Answer

A)  has a 70s subunit
B)  has a peptide (P) site
C)  has an exit site
D)  small unit provides the enzymes for making peptide bonds
E)  has an amino acid (
A)  siteF) B) and D)
G) B) and C)

Question 4

A bacterial cell has replicated its plasmid,and when this cell divides into 2 daughter cells,each cell receives one copy of the plasmid.This is an example of horizontal gene transfer.

Accepted Answer

A) True 
 B)False

Question 5

All mutations are not beneficial to the cell.

Accepted Answer

A) True 
 B)False

Question 6

Repressible operons are normally turned on in the cell.

Accepted Answer

A) True 
 B)False

Question 7

Of the following list,which antibiotics affect protein synthesis?

Accepted Answer

A)  penicillin
B)  tetracycline
C)  chloramphenicol
D)  ciprofloxacin
E)  Both tetracycline and chloramphenicol are correct.F) A) and B)
G) B) and D)

Question 8

An unidentified cell was found to contain introns and exons,to express DNA polymerase and RNA polymerase.Although it exhibits a promoter region it has no operons.You conclude that this cell:

Accepted Answer

A)  is eukaryotic.
B)  is prokaryotic.
C)  is either a prokaryotic or eukaryotic cell.
D)  is actually a virus.E) A) and D)
F) A) and B)

Question 9

If the wild type DNA sequence reads THE CAT ATE THE BIG RAT,what type of mutation would change the sequence to THE CAT ATE THE BAG RAT?

Accepted Answer

A)  point
B)  nonsense
C)  insertion
D)  deletion
E)  silentF) All of the above
G) C) and D)

Question 10

Which of the following is not true of an organism's genotype?

Accepted Answer

A)  is inherited
B)  are structural genes coding for proteins
C)  are genes coding for RNA
D)  are regulatory genes controlling gene expression
E)  are the expressed traits governed by the genesF) C) and D)
G) A) and E)

Question 11

RNA molecules differ from DNA molecules because only RNA

Accepted Answer

A)  has ribose.
B)  has uracil.
C)  is typically one strand of nucleotides.
D)  does not have thymine.
E)  All of the choices are correct.F) A) and B)
G) A) and E)

Question 12

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

Accepted Answer

A)  the product
B)  a cofactor
C)  a coenzyme
D)  the substrate
E)  the reactantF) B) and E)
G) C) and D)

Question 13

Which of the following is not true of conjugation?

Accepted Answer

A)  involves direct contact between cells
B)  transfers genes for drug resistance
C)  transfers genes for enzymes and adherence molecules
D)  involves the action of bacteriophage
E)  the donor retains a copy of the transferred genesF) B) and E)
G) A) and B)

Question 14

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

Accepted Answer

A)  chromosome
B)  plasmid
C)  prophage
D)  genome
E)  proteomeF) A) and D)
G) D) and E)

Question 15

The transfer of DNA fragments from a dead cell to a live,competent recipient cell that results in a changed recipient cell is termed

Accepted Answer

A)  transduction.
B)  conjugation.
C)  transformation.
D)  transmission.
E)  mitosis.F) None of the above
G) C) and E)

Question 16

Synthesis of a repressible enzyme is inhibited by

Accepted Answer

A)  repressor alone bound to operator.
B)  substrate bound to repressor.
C)  substrate bound to promoter.
D)  corepressor and repressor binding to operator.E) A) and B)
F) All of the above

Question 17

If the wild type DNA sequence reads THE CAT ATE THE BIG RAT,what type of mutation would change the sequence to THE CAT ATE (stop) ?

Accepted Answer

A)  missense
B)  nonsense
C)  insertion
D)  deletion
E)  silentF) All of the above
G) B) and C)

Question 18

The jumping of a gene from one location to another is done by

Accepted Answer

A)  conjugation.
B)  transposons.
C)  transformation.
D)  transduction.
E)  transmission.F) All of the above
G) C) and E)

Question 19

Hfr transfer involves all of the following except

Accepted Answer

A)  gene integration into the bacterial chromosome.
B)  plasmid gene transfer.
C)  F factor is part of the F+ donor chromosome.
D)  high frequency transfer.
E)  a pilus connection between F+ and F- cells.F) A) and B)
G) C) and D)

Question 20

Groups of three consecutive bases along the DNA of a gene have the code for one

Accepted Answer

A)  protein.
B)  nucleotide.
C)  amino acid.
D)  purine.E) A) and D)
F) C) and D)

Exam 9: Microbial Genetics

During replication,each parent DNA strand serves as a _____ for synthesis of new DNA strands.

Correct AnswerverifiedShow Answer

If the wild type DNA sequence reads THE CAT ATE THE BIG RAT,what type of mutation would change the sequence to THE CAT ATE THE BAG RAT?

Correct AnswerverifiedShow Answer

RNA polymerase binds to the

Correct AnswerverifiedShow Answer

Synthesis of a repressible enzyme is inhibited by

Correct AnswerverifiedShow Answer

The jumping of a gene from one location to another is done by

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Hfr transfer involves all of the following except

Correct AnswerverifiedShow Answer

If the wild type DNA sequence reads THE CAT ATE THE BIG RAT,what type of mutation would change the sequence to THE CAT ATE (stop) ?

Correct AnswerverifiedShow Answer

Which of the following is not true of an organism's genotype?

Correct AnswerverifiedShow Answer

Which of the following is not associated with a prokaryotic ribosome?

Correct AnswerverifiedShow Answer

All mutations are not beneficial to the cell.

Correct AnswerverifiedShow Answer

The transfer of DNA fragments from a dead cell to a live,competent recipient cell that results in a changed recipient cell is termed

Correct AnswerverifiedShow Answer

RNA molecules differ from DNA molecules because only RNA

Correct AnswerverifiedShow Answer

Which of the following is not true of conjugation?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

An unidentified cell was found to contain introns and exons,to express DNA polymerase and RNA polymerase.Although it exhibits a promoter region it has no operons.You conclude that this cell:

Correct AnswerverifiedShow Answer

Repressible operons are normally turned on in the cell.

Correct AnswerverifiedShow Answer

A bacterial cell has replicated its plasmid,and when this cell divides into 2 daughter cells,each cell receives one copy of the plasmid.This is an example of horizontal gene transfer.

Correct AnswerverifiedShow Answer

Groups of three consecutive bases along the DNA of a gene have the code for one

Correct AnswerverifiedShow Answer

Of the following list,which antibiotics affect protein synthesis?

Correct AnswerverifiedShow Answer

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