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- Question
Which of the following is the most primitive?
Options- A. Virus
- B. Eukaryote
- C. Archaeon
- D. Mitochondria
- Correct Answer
- Archaeon
- 1. Which of the following is best used for long term storage of microbial samples when carried out properly?
Options- A. Storage in a freezer at -10°C
- B. Storage in a freezer at ultra low temperatures (-70°C)
- C. Storage in a refrigerator on an agar slant
- D. Storage on a petri plate at room temperature Discuss
- 2. Which of the following compounds are commonly used as general antiseptics to treat cuts and scratches?
Options- A. Aldehydes
- B. Ethylene oxide
- C. Halogens
- D. None of these Discuss
- 3. If a canning procedure is not properly followed, which type of microbe is most likely to grow in the canned food?
Options- A. Obligate Aerobe
- B. Acidophile
- C. Mesophile
- D. Obligate Anaerobe Discuss
- 4. Which of the following articles can be sterilized in an autoclave?
Options- A. Gloves
- B. Culture media
- C. Dressing material
- D. All of these Discuss
- 5. Which of the following is a nontranslated sequence located between the transcription and the translation start site?
Options- A. Ending frame
- B. Leader sequence
- C. Trailer sequence
- D. Reading frame Discuss
- 6. If a 1:600 dilution of a test compound kills a standard population of Staphylococcus aureus in 10 minutes but not 5 minutes while a 1:60 dilution of phenol kills the population in the same time, what is the phenol coefficient of the test compound?
Options- A. 1
- B. 5
- C. 10
- D. 50 Discuss
- 7. The ribosome binding site
Options- A. forms a stem-loop structure in the RNA
- B. is located upstream of the promoter sequence
- C. is located immediately upstream of the start codon
- D. is more likely to be associated with an operon than with a gene encoding a single protein Discuss
- 8. Which of the following tests is designed to simulate the natural conditions under which the disinfectants are used in hospitals?
Options- A. Phenol coefficient test
- B. Minimum inhibitory concentration test
- C. Capacity test
- D. None of these Discuss
- 9. Which of the following is a limitation of the autoclave?
Options- A. It takes too long to sterilize
- B. It lacks the ability to inactivate viruses
- C. It lacks the ability to kill endospores
- D. It will destroy heat labile materials Discuss
- 10. NaCl can act as
Options- A. antagonist at optimal concentrations
- B. synergistically if added in excess of optimum level
- C. Both (a) and (b)
- D. None of the above Discuss
More questions
Correct Answer: Storage in a freezer at ultra low temperatures (-70°C)
Correct Answer: Halogens
Correct Answer: Obligate Anaerobe
Correct Answer: All of these
Correct Answer: Leader sequence
Correct Answer: 10
Correct Answer: is located immediately upstream of the start codon
Correct Answer: Capacity test
Correct Answer: It will destroy heat labile materials
Correct Answer: Both (a) and (b)
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