How many chromosomes are founding a typical bacterial cell

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Reference no: EM133349484

Assignment:

1) The active antimicrobial ingredient in Bleach is:

(a) phenol

(b) hydrochloride

(d) iodine

(e) bromide

2) In contrast with moist heat, dry heat probably damages microbes by:

(a) Denaturing proteins

(b) Denaturing nucleic acids

(d) Direct oxidation of molecules

(e) Cross-linking of DNA

3) How many chromosomes are founding a typical bacterial cell?

(a) 2

(b) 1

(d) 23

(e) 16

4) Bacteriophage-mediated transfer of genetic material between bacteria is called:

(a) transformation

(b) transfection

(d) transduction

(e) cloning

5) If a disinfectant kills 90% of a bacterial population in 1 minute, what is the minimum time required to kill 100% of 10,000 cells in a solution?

(a) 3 minutes

(b) 7 minutes

(d) 10 minutes

(e) 2 minutes

6) An organism that can synthesize all of its required organic compounds from carbon dioxide using energy from the oxidation of reduced inorganic molecules is a:

(a) photoautotroph

(b) photoheterotroph

(d) chemoautotroph

(e) chemoheterotroph

7) The fundamental limitation on the resolving power of a light microscope is

(A) the magnifying power of the ocular lens

(B) the lack of coloration of microorganisms

(D) the wavelengths of visible light

(E) the magnifying power of the objective lens

8) Unlike a disinfectant, an antiseptic

(a) sterilizes objects

(b) destroys all microorganisms

(d) requires heat to be effective

(e) is usually used in food products.

9) A human pathogen would most likely fall into which category?

(a) psychrophiles

(b) psychrotrophs

(d) thermophiles

(e) extreme thermophiles

10) A member of the Archaea would most likely fall into which category?

(a) psychrophiles

(b) psychrotrophs

(d) thermophiles

(e) extreme thermophiles

Reference no: EM133349484

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