A.   the destruction or removal of all microbial life and viruses

B.   the destruction or removal of the majority of the pathogens

C.   two of these are correct

D.   some microbes that remain

A.   the cell wall of a pathogen

B.   the proteins of a pathogen

C.   the cell membrane of a pathogen

D.   all of these are correct

A.   chemical

B.   physical

C.   extreme

D.   minimal

A.   It cannot penetrate cloudy liquids

B.   It cannot penetrate solid surfaces

C.   If used on body cells, it can cause mutations and lead to cancer

D.   All of these are correct

A.   shoter

B.   longer

A.   The targeted bacterial species is isolated using the streak plate method and filter paper disks submerged in disinfectants are placed on the isolated colonies.

B.   All of these are appropriate ways to prepare the filter paper disk method.

C.   The broth culture of a bacterial species is poured through a filter paper and placed on a sterile agar plate.

D.   A bacterial lawn of the targeted bacterial species is prepared and filter paper disks submerged in various disinfectants are placed on the plate.

A.   The region around the disk that shows growth

B.   The thick layer of a single species of bacteria

C.   Two of these are correct

D.   The region around the disk that shows no growth

A.   FALSE

B.   TRUE

A.   They are compounds made from scratch in a laboratory to inhibit or kill organisms

B.   They are effective against viruses

C.   They are natural compounds made by an organism that can be used to inhibit or kill other organisms.

D.   They are natural compounds that are modified in the laboratory to inhibit other organisms

A.   Pour the entire contents of a broth culture on the surface of an agar plate.

B.   Using a cotton swab, apply the bacteria across the surface of the agar

C.   Perform serial dilutions on a broth culture and pipet a small amount in melted agar.

D.   Using an inoculating loop, apply the streak plate method to obtain isolated colonies