Growth and Nutrition of Bacteria - Section 3 Multiple Questions and Answers.




11.An organism is completely dependent on atmospheric O2 for growth. This organism is
A. osmotolerant
B. acidophile
C. facultative anaerobe
D. obligate aerobe

12.Microaerophilic bacteria are those which require
A. 21 % oxygen for growth
B. oxygen for activation of enzymes
C. low levels of oxygen for growth (lesser than O2 present in atmosphere)
D. All of Above

13.The period between inoculation of bacteria in a culture medium and beginning of multiplication is known as
A. stationary phase
B. log phase
C. lag phase
D. decline phase

14.The term aerotolerant anaerobe refers to an organism that
A. doesn't use oxygen but can grow in the presence of oxygen
B. is killed by oxygen
C. requires less oxygen than is present in air
D. prefers to grow without oxygen

15.The term obligate anaerobe refers to an organism that
A. doesn't use oxygen but tolerates it
B. is killed by oxygen
C. uses oxygen when present or grows without oxygen when oxygen is absent
D. prefers to grow without oxygen

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