5) the scientist that contributed most to the development of pure culture techni

Question

5) the scientist that contributed most to the development of pure culture techniques was

a) Fleming

b) Pasteur

c) Jenner

d) Koch

6) the solidifying agent used most successfully in bacterial nutriet media is

a) gelatin

b) peptone

c) agar

d) starch

1) Generally, membrane filters are not used to remove

a) bacteria from liquids

b) microorganisms from gases

c) spoilage agents from alcoholic beverages

d) enzymes

2) plain soap is very effective in controlling spread of microorganisms because it is

a) bacteriostatic

b) very effective at the mechanical removal of microoorganisms

c) virucidal

d) bactericidal

3) the endospores of Pseudomas make that organism very difficult to kill. True or False

4) Pasterurization results in the sterilization of food products. True or False.

7) One would expect most strict anaerobic organisms to have superoxide dismutase. True or False.

8) Differential media only allows certain bacteria to grow. True or False.

9) Freezing is an effective means of destroying bacteria. True or False.

10) 100% ethanol is twice as effective as 60% ethanol at controlling bacteria. True or False.

Explanation / Answer

As per Chegg policy, proceeding to answer only the first 4 Question parts/subparts:

Answer 5)
The scientist that contributed most to the development of pure culture techniques was: d) Koch

Answer 6)
The solidifying agent used most successfully in bacterial nutriet media is: c) agar

Answer 1)
Generally, membrane filters are not used to remove: d) enzymes

Answer 2)
Plain soap is very effective in controlling spread of microorganisms because it is: b) very effective at the mechanical removal of microoorganisms

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