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Home ‣ Microbiology ‣ Industrially Useful Microbial Processes See What Others Are Saying!
- Question
It is mandatory that cultures and fermentation residues be sterilized before discard in case of Eremothecium ashbyii and Ashbya gossypii because they are
Options- A. plant pathogens
- B. human pathogens
- C. plant mutants
- D. none of these
- Correct Answer
- plant pathogens
- 1. Due to which of the following DNA repair mechanisms, one is able to distinguish newly synthesized DNA strands from older one?
Options- A. New strands do not contain cytosine bases
- B. New strands are lower in molecular size
- C. Old strands are methylated while new strands are not
- D. New strands are methylated while old strands are not Discuss
- 2. Media containing spores and thermolabile constituents are sterilized by
Options- A. pasteurization
- B. UV radiation
- C. dry heat
- D. tyndalization Discuss
- 3. Suspension cultures consist of cells and cell aggregates, growing dispersed in
Options- A. liquid medium
- B. solid nutrient medium
- C. solid or liquid medium
- D. none of these Discuss
- 4. Steam exposure of a material at 100°C for 20 minutes for three consecutive days is known as
Options- A. inspissation
- B. tyndallization
- C. autoclaving
- D. none of these Discuss
- 5. Which of the following bacteria is acid-fast?
Options- A. Actinomyces
- B. Nocardia
- C. Streptomyces
- D. Corynebacterium Discuss
- 6. Which of the following bacteria lack a cell wall and are therefore resistant to penicillin?
Options- A. Cyanobacteria
- B. Mycoplasmas
- C. Bdellovibrios
- D. Spirochetes Discuss
- 7. The synthesis of mRNA based on a DNA template is called
Options- A. DNA replication
- B. transcription
- C. translation
- D. DNA restriction Discuss
- 8. Cyanobacteria have
Options- A. a gram-positive cell wall
- B. a gram-negative cell wall
- C. Neither (a) nor (b)
- D. No cell wall Discuss
- 9. Which of the following is/are included in Kingdom Prokaryotae?
Options- A. Bacteria
- B. Protozoa
- C. Fungi
- D. All of these Discuss
- 10. Which of the following enzyme(s) is/are required for lactose fermentation?
Options- A. Transacetylase
- B. ?-galactosidase
- C. Galactoside permease
- D. All of these Discuss
More questions
Correct Answer: Old strands are methylated while new strands are not
Correct Answer: UV radiation
Correct Answer: liquid medium
Correct Answer: tyndallization
Correct Answer: Nocardia
Correct Answer: Mycoplasmas
Correct Answer: transcription
Correct Answer: a gram-negative cell wall
Correct Answer: Bacteria
Correct Answer: All of these
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