Microbiology Test Questions with Answers

Topics: DNA, Genetics, Gene Pages: 3 (428 words) Published: October 14, 2014
 Question 1
Needs Grading

An organism with a mutation that is no longer able to make a particular nutrient for itself is known as a(n) _________________.

Selected Answer:
[None Given]
Correct Answer:

auxotroph

 Question 2
Needs Grading

An organism that has a mutation is called a(n)______________.

Selected Answer:
[None Given]
Correct Answer:

mutant

 Question 3
1 out of 1 points

Which of the following causes extra nucleotides to be added to a gene?

Selected Answer:

insertion mutation

 Question 4
1 out of 1 points

Which of the following have chemical structures similar to nitrogenous bases?

Selected Answer:

base analogs

 Question 5
Needs Grading

In complete sentences, discuss repair mechanisms of thymine dimers.  Be sure to describe all three mechanisms, light repair, dark repair, and SOS repair

Selected Answer:
[None Given]
Correct Answer:

Light repair-sunlight energy is used to fuel and enzyme that breaks the bond between adjacent thymines(1pt).  -Only works in daylight (1pt) Dark repair-enzyme cuts out the piece of DNA containing the thymine dimer (1pt) DNA polymerase must come make two new thymines (1pt)  SOS repair- only used after heavy UV light damage when there are multiple thymine dimers (1pt)  Set of 20 genes are turned on; one is for a new DNA polymerase which can read past the thymine dimer but does not have proof reading capability (1pt)

 Question 6
Needs Grading

In complete sentences describe the technique used to select auxotrophic mutants in lab.  Be sure to include the procedure for indirect selection/replica plating.

Selected Answer:
[None Given]
Correct Answer:

Indirect selection./replica plating-use sterile velvet (1) to move bacteria to a NA plate and a NA + nutrient plate.  (1)  Incubate and...
Continue Reading

Please join StudyMode to read the full document

You May Also Find These Documents Helpful

  • Test Essay
  • Microbiology Test Questions Essay
  • Essay on Microbiology Test Questions
  • Journalism Test Questions with Answers Essay
  • Microbiology Essay
  • Economics Test Questions Essay
  • Organizational Leadership Test Questions with Answers Essay
  • Test Questions with Answer for Psychology 101 Essay

Become a StudyMode Member

Sign Up - It's Free