Bacteria MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Bacteria, a fundamental topic in the field of Microbiology. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Bacteria MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Bacteria mcq questions that explore various aspects of Bacteria problems. Each MCQ is crafted to challenge your understanding of Bacteria principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Microbiology tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Bacteria MCQs are your pathway to success in mastering this essential Microbiology topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Bacteria. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Bacteria knowledge to the test? Let's get started with our carefully curated MCQs!

Bacteria MCQs | Page 22 of 33

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Q211.
A culture broth tube was very turbid at the surface but clear throughout the rest of the tube indicating that the

a.

organism are aerobes

b.

organism should be grown in an anaerobic chamber

c.

organism cannot produce superoxide dismutase and/or catalase

d.

organism cannot tolerate oxygen

Discuss
Answer: (a).organism are aerobes
Q212.
A synergistic effect is observed when

a.

one organism removes an inhibitory substance for another

b.

one organism produces a growth factor utilized by another

c.

microbial alteration of pH, aw, Eh favours the growth of another

d.

all of the above

Discuss
Answer: (d).all of the above
Q213.
Generation time is

a.

time required for the population to double

b.

time required for the initial adjustment

c.

obtained by expression t/n, where t = time interval, n = number of generation

d.

both (a) and (c)

Discuss
Answer: (d).both (a) and (c)
Q214.
The term facultative 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 absent

d.

requires less oxygen than is present in air

Discuss
Answer: (c).uses oxygen when present or grows without oxygen when absent
Q215.
The microorganisms that grow best in a low-oxygen environment is called a (n)

a.

aerobe

b.

anaerobe

c.

facultative

d.

microaerophile

Discuss
Answer: (d).microaerophile
Q216.
Pseudomonas pseudoflava can grow as

a.

chemo-lithotrophs

b.

chemo-organotrophs

c.

both (a) and (b)

d.

none of these

Discuss
Answer: (c).both (a) and (b)
Q217.
Which of the following is the suitable temperature range for mesophiles?

a.

20-30°C

b.

25-40°C

c.

>40°C

d.

None of these

Discuss
Answer: (b).25-40°C
Q218.
Exponential phase of growth curve of bacteria is of limited duration because of

a.

rise in cell density

b.

accumulation of toxic metabolites

c.

exhaustion of nutrients

d.

all of these

Discuss
Answer: (d).all of these
Q219.
A culture broth tube was very turbid at the bottom of the tube but clear at the top of the tube indicating that the

a.

broth is sterile

b.

organism can tolerate oxygen

c.

organism cannot produce superoxide dismutase and/or catalase

d.

organism should be grown in an anaerobic chamber

Discuss
Answer: (c).organism cannot produce superoxide dismutase and/or catalase
Q220.
In the exponential phase, the cells and cell mass

a.

first increases then decreases

b.

decreases

c.

are constant

d.

double at a constant rate

Discuss
Answer: (d).double at a constant rate
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