microbiology Revised study set
Final exam Questions and
Answers
1. What microbial process was responsible for changing earth`s atmosphere from one without oxygen
to one with oxygen? - ANSWER Oxygenic photosynthesis
2. In the nitrogen cycle, which of the following phases involves the release of nitrogen as N2? -
ANSWER Denitrification
3. which of the following viral enzymes converts viral RNA into DNA? - ANSWER reverse transcriptase
4. which of the following types of RNA is clover shaped and brings amino acids to the ribosome during
translation? - ANSWER transfer RNA
5. ATP is a - ANSWER Nucleotide that releases and stores energy in the cell
6. A viral capsid is composed of - ANSWER proteins
7. which of these are NOT considered a living organism? - ANSWER Viruses
8. how is it possible for green surfer bacteria that live on the ocean floor - where no sunlight can reach
- to carry on photosynthesis? - ANSWER they get light from geothermal radiation
, 9. what is the bacterial identification technique that, when positive, results in the bacterium staining
two contrasting colors? - ANSWER Gram staining
10. Which of the following is found In some, but not all groups of eukaryotic microorganisms? -
ANSWER cell wall
11. which of the following structures is found in gram-negative bacteria but is absent from gram-
positive bacteria? - ANSWER outer lipid membrane
12. which of the following structures is found in gram-negative bacteria but is absent from gram-
positive bacteria? - ANSWER outer lipid membrane
13. Which of the following microorganisms is used to make yogurt? - ANSWER Lactobacillus bulgaricus
14. which type of archaea is able to survive in extremely high concentrations of salt? - ANSWER
halophiles
15. which of the following is true of prokaryotes, but not true of eukaryotes? - ANSWER they have cell
walls made of peptidoglycan
16. which of the following is the role of ribosomes? - ANSWER provide a site for protein synthesis
17. which of the following are theorized to be the ancestors of chloroplasts? - ANSWER cyanobacteria
18. which eukaryotic microorganisms are photoautotrophs? - ANSWER algae
19. describe the genetic material that is contained within a virus. - ANSWER RNA or DNA, not both
20. in the life cycle of an animal virus, what occurs during adsorption? - ANSWER the virus attaches to
the receptor sites outside the host cell