Microorganisms(Microbiology ) Questions and Answers
Question 1. For the examination of microbial cells we require the use of?
High-power microscope
Low-power microscope
High-power microscope at a magnification of about 1,000 diameters
Low-power microscope at a magnification of about 1,000 diameters
Explanation:-
Answer: Option C. -> High-power microscope at a magnification of about 1,000 diameters Answer: (c).High-power microscope at a magnification of about 1,000 diameters
Question 2. Lipopolysaccharide in cell walls is characteristic of?
Gram-positive bacteria
Gram-negative bacteria
Fungi
Algae
Explanation:-
Answer: Option B. -> Gram-negative bacteria Answer: (b).Gram-negative bacteria
Question 3. Growth of microbes in a solid media is identified by the formation of?
pellicle at the top of media
colonies
sediment at the bottom
turbidity
Explanation:-
Answer: Option B. -> colonies Answer: (b).colonies
Question 4. Which microorganism(s) among the following perform photosynthesis by utilizing light?
Cyanobacteria
Fungi
Viruses
Cyanobacteria, Fungi and Viruses
Explanation:-
Answer: Option A. -> Cyanobacteria Answer: (a).Cyanobacteria
Question 5. Which among the following are produced by microorganisms?
Fermented dairy products
Breads
Alcoholic beverages
Fermented dairy products, breads and alcoholic beverages
Explanation:-
Answer: Option D. -> Fermented dairy products, breads and alcoholic beverages Answer: (d).Fermented dairy products, breads and alcoholic beverages
Question 6. Which of the following actions occur due to low temperature?
coagulation of proteins
death of microorganisms
rate of metabolism is reduced
denatures proteins
Explanation:-
Answer: Option C. -> rate of metabolism is reduced Answer: (c).rate of metabolism is reduced
Question 7. Passage of water from a low solute concentration into the cell is referred to as ______________
plasmoptysis
plasmolysis
isotonic
hypertonic
Explanation:-
Answer: Option A. -> plasmoptysis Answer: (a).plasmoptysis
Question 8. Which of the following are resistant to desiccation?
gonococci
streptococci
meningococci
bacillus
Explanation:-
Answer: Option B. -> streptococci Answer: (b).streptococci
Question 9. Which of the following radiations have the energy to knock electrons away from molecules and ionize them?
Non-ionizing radiations
Acoustic radiations
Subatomic particles
Ionizing radiations
Explanation:-
Answer: Option D. -> Ionizing radiations Answer: (d).Ionizing radiations
Question 10. Wavelengths around ___________ have the highest bactericidal efficiency.
