Practice Questions_dr. Schlegel_may_aug2011 _pt.2

15 Questions | By Rosssweetie | Last updated: Mar 21, 2022 | Total Attempts: 145

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1.

Binding of an autoinducer peptide to the sensor kinase of a quorum sensing system in a Gram-positive bacterium leads to altered regulation of genetic loci present on different parts of the chromosome and transcribed in different directions. Which of the following would best describe the organization of the genes targeted by this quorum-sensing system?
- A.
  
  Divergent operons
- B.
  
  Regulon
- C.
  
  Contrary operons
- D.
  
  Divergent regulation
- E.
  
  Indirect regulation
2.

The SOS response is a DNA repair mechanism that responds to extreme DNA damage
- A.
  
  True
- B.
  
  False
3.

Which 3 of the following could be required or produced by an organism using anaerobic respiration?
- A.
  
  Organic acids
- B.
  
  Cytochromes
- C.
  
  Nitrite
- D.
  
  Oxygen
- E.
  
  Sulfate
4.

In generalized transduction, viruses carry random DNA sequences from one cell to another
- A.
  
  True
- B.
  
  False
5.

A(n) __________ is a specific sequence of nucleotides that codes for a protein or an RNA molecule.
- A.
  
  Transposons
- B.
  
  Gene
- C.
  
  Competent
- D.
  
  Missense
- E.
  
  Anticodon
6.

If the codon AUG, coding for methionine, were mutated to AAG, coding for lysine, this would be an example of a(n) __________ mutation.
- A.
  
  Transposons
- B.
  
  Gene
- C.
  
  Competent
- D.
  
  Missense
- E.
  
  Anticodon
7.

The __________ of a transfer RNA molecule is complementary to a codon in a messenger RNA molecule.
- A.
  
  Transposons
- B.
  
  Gene
- C.
  
  Competent
- D.
  
  Missense
- E.
  
  Anticodon
8.

Cells that are able to perform transformation are said to be __________.
- A.
  
  Transposons
- B.
  
  Gene
- C.
  
  Competent
- D.
  
  Missense
- E.
  
  Anticodon
9.

"Jumping genes" that can move from one location to another in an organism's genome are called __________.
- A.
  
  Transposons
- B.
  
  Gene
- C.
  
  Competent
- D.
  
  Missense
- E.
  
  Anticodon
10.

The OmpR response regulator is activated in the presence of high solutes. One of the genes activated by OmpR is micF, whose nucleic acid product binds the ompF message and ends up reducing OmpF protein production, thereby reducing solute uptake. Which of the following terms would best describe micF and the stage at which it regulates OmpF production?
- A.
  
  An antiterminator, acts on transcription
- B.
  
  A kinase, regulates post-translationally
- C.
  
  An antisense RNA, alters translation
- D.
  
  An RNA stabilizing protein, alters translation
- E.
  
  Sigma factor, acts on transcription
11.

During translation, the growing polypeptide is positioned in the __________ of the ribosome
- A.
  
  Promoters
- B.
  
  Triphosphate deoxyribonucleotides
- C.
  
  P site
- D.
  
  Replication fork /bubble
- E.
  
  Leading strand
12.

dATP and dCTP are examples of __________, the building blocks of DNA molecules
- A.
  
  Promoters
- B.
  
  Triphosphate deoxyribonucleotides
- C.
  
  P site
- D.
  
  Replication fork /bubble
- E.
  
  Leading strand
13.

The point at which a DNA double helix is "unzipped" is the __________.
- A.
  
  Promoters
- B.
  
  Triphosphate deoxyribonucleotides
- C.
  
  P site
- D.
  
  Replication fork /bubble
- E.
  
  Leading strand
14.

The __________ is the DNA strand that is synthesized continuously during DNA replication.
- A.
  
  Promoters
- B.
  
  Triphosphate deoxyribonucleotides
- C.
  
  P site
- D.
  
  Replication fork /bubble
- E.
  
  Leading strand
15.

RNA polymerase initiates transcription by recognizing specific nucleotide sequences called __________. .
- A.
  
  Promoters
- B.
  
  Triphosphate deoxyribonucleotides
- C.
  
  P site
- D.
  
  Replication fork /bubble
- E.
  
  Leading strand