Georgia State University BIOL 2300 Control of microbial growth 1)The process of killing or removing all the microorganisms in or on a material is termed -   2

Georgia State University

BIOL 2300

Control of microbial growth

1)The process of killing or removing all the microorganisms in or on a material is termed -

2. A sterile item is free of ___________

3. Moist heat kills microorganisms by an irreversible coagulation of proteins.

A- True

B- false

4. Boiling is not reliable for sterilization because endospores can survive A- True

B- False

5. Alcohols are not reliably effective at destroying naked viruses AND endospores.

A- True; some naked viruses

B- False

6. Glutaraldehyde is, if given enough time, able to destroy all forms of microbial life AND is very good for use on heat-sensitive medical items.

A- True

B- False

7. What is Ethylene oxide is gas , is very useful for sterilizing heat or moisture sensitive items AND is potentially carcinogenic.

A- True

B- False

. 8. Chlorine readily reacts with organics to produce potentially carcinogenic trihalomethanes AND is an effective, inexpensive, disinfectant able to destroy all types of microorganisms.

A- True

B- False

9. Which is true of iodine?

It does not readily kill endospores.

It may be used as an antiseptic or as a disinfectant.

11. Which of the following is true of hydrogen peroxide?

It is a sterilant for inanimate objects and is quickly inactivated on living tissue.

 It leaves a toxic residue.

It is broken down by catalase into water and oxygen.

12. Hexachlorophene has been particularly effective against      

13. Which is true about Quaternary ammonium compounds are

cationic detergents which help wash surfaces

attracted to the negative charge on the microbial cell membrane and can destroy it

14. Gamma rays cause biological damage in living systems by

producing reactive molecules such as superoxide and hydroxyl free radicals.

A- True

B- False

15. Inducing mutation of nucleic acids and destroying proteins A- True

B- False

16. causing tiny gravity sinks and black holes to be formed in the substance.

A- True B-False

Introducing toxins.

A-True B- False

making the substance radioactive.

A- True

B- False

17. Can UV light

Destroy bacterial spores ? Disinfect air and surfaces ?

Cause mutation of DNA via Thymine dimerization ?  Penetrate through glass?