Question

Microbiology question!

These bacteria among A-D are not able to utilize oxygen for growth:

A. Facultative anaerobes

B. Aerotolerant anaerobes

C. Microaerophiles

D. Obligate aerobes

E. A-D are all capable of using oxygen for growth

2. which statement among A-D is false regarding physcial and chemical agents of control?

A. Effective killing of bacteria via irradiation with gamma rays or x-rays would likely take longer than if irridated with UV light.

B. Detergent type disinfectants exert their effect by solubilizing membranes

C. Antiseptics are generally not as strong as disinfectants

D. Resistance to disinfectants may occur if the disinfectants is used at much lower than optimal concentrations

W. None of A-D is false.

Answer 1

B. Aerotolerant anaerobes.... can tolerate oxygen but always perform fermentation ....

A. Effective killing of bacteria via irradiation with gamma rays or x-rays would likely take longer than if irridated with UV light.......Because gamma rays are ionising and more stronger than non-ionising uv rays hence gamma ray irradation would cause more damage and require less time ....

Hope it helps ... feel free to discuss... I will be glad to help you .... Regards