Cell Cultures and Characteristics C. 6.79
D. 3.5
1. Which of the following bacteria can grow in acidic pH?
8. For the selection of endospore-forming bacteria, a mixed
A. Vibrio cholerae culture can be heated at
B. Lactobacilli
C. Shigella A. 80°C for 10 minutes
D. Salmonella B. 70°C for 10 minutes
C. 60°C for 10 minutes
2. Cell size and cell number can be measured using D. 90°C for 10 minutes
A. hemocytometer 9. The concentration of agar to obtain semi solid media is
B. coulter counter
C. petroff-hausser counting chamber A. 1.5-20%
D. none of these B. 0.5% or less
C. >10%
3. Which of the following is used for the proper D. >10%but<20%
maintenance and preservation of pure cultures?
10. Which of the following bacteria dies quickly after
A. Periodic transfer to fresh media drying?
B. Preservation by overlaying cultures with mineral oil
C. Preservation by lyophilization A. Treponema pallidium
D. All of the above B. Mycobacterium tuberculosis
C. Staphylococcus aureus
4. In the process of freeze drying, a dense cell suspension is D. Pseudomonas aeruginosa
placed in small vials and is frozen at
11. Mac-Conkey medium is an example of
A. -60 to -78°C
B. -20 to -30°C A. transport medium
C. -30 to -48°C B. enrichment medium
D. -48 to -58°C C. differential medium
D. all of these
5. The solidifying agent commonly used in preparation of
media is/are 12. Pseudomonas aeruginosa forms a blue water soluble
pigment called
A. agar
B. silica gel A. pyocyanin
C. both (a) and (b) B. chlororaphin
D. none of these C. pyoverdin
D. β-carotene
6. Which of the following chemotherapeutic agents may
affect the growth of Campylobacter jejuni? 13. Agar is used for solidifying culture media because
A. Vacomycin A. it does not affect by the growth of bacteria
B. Polymyxin B. it does not add to the nutritive properties of the
C. Trimethoprim medium
D. None of these C. the melting and solidifying points of agar solution are
not the same
7. To select cholera-causing bacterium, Vibrio cholerae, the D. all of the above
pH of the medium is maintained at a pH of
A. 8.5
B. 8.90
D. 3.5
1. Which of the following bacteria can grow in acidic pH?
8. For the selection of endospore-forming bacteria, a mixed
A. Vibrio cholerae culture can be heated at
B. Lactobacilli
C. Shigella A. 80°C for 10 minutes
D. Salmonella B. 70°C for 10 minutes
C. 60°C for 10 minutes
2. Cell size and cell number can be measured using D. 90°C for 10 minutes
A. hemocytometer 9. The concentration of agar to obtain semi solid media is
B. coulter counter
C. petroff-hausser counting chamber A. 1.5-20%
D. none of these B. 0.5% or less
C. >10%
3. Which of the following is used for the proper D. >10%but<20%
maintenance and preservation of pure cultures?
10. Which of the following bacteria dies quickly after
A. Periodic transfer to fresh media drying?
B. Preservation by overlaying cultures with mineral oil
C. Preservation by lyophilization A. Treponema pallidium
D. All of the above B. Mycobacterium tuberculosis
C. Staphylococcus aureus
4. In the process of freeze drying, a dense cell suspension is D. Pseudomonas aeruginosa
placed in small vials and is frozen at
11. Mac-Conkey medium is an example of
A. -60 to -78°C
B. -20 to -30°C A. transport medium
C. -30 to -48°C B. enrichment medium
D. -48 to -58°C C. differential medium
D. all of these
5. The solidifying agent commonly used in preparation of
media is/are 12. Pseudomonas aeruginosa forms a blue water soluble
pigment called
A. agar
B. silica gel A. pyocyanin
C. both (a) and (b) B. chlororaphin
D. none of these C. pyoverdin
D. β-carotene
6. Which of the following chemotherapeutic agents may
affect the growth of Campylobacter jejuni? 13. Agar is used for solidifying culture media because
A. Vacomycin A. it does not affect by the growth of bacteria
B. Polymyxin B. it does not add to the nutritive properties of the
C. Trimethoprim medium
D. None of these C. the melting and solidifying points of agar solution are
not the same
7. To select cholera-causing bacterium, Vibrio cholerae, the D. all of the above
pH of the medium is maintained at a pH of
A. 8.5
B. 8.90
