15. Which of the following germicidal agents is not a halogen? a. lodine b. Phen

Question

15. Which of the following germicidal agents is not a halogen? a. lodine b. Phenol c. Chlorine d. All of these are halogens 16. All of the following germicidal agents affecet microorganisms by interfering with proteins EXCEPT a. Halogens b. Chlorohexidine c. Hydrogen peroxide d. Aldehydes 17. What category of antimicrobial agents can be found in more than one third of all chemical antimicrobial agents? a. Phenols b. Halogens c. Alcohols d. Aldehydes 18. Detergents are a. High-level germicides b. Low-level germicides c. Excellent antiseptics d. Used in disinfecting surgical instruments 19. Antibiotics are common metabolic products of a. Aerobic bacteria b. Anaerobic bacteria c. Protozoans d. Helminthes 20. Which of the following is NOT true about penicillin? a. It affects the cell wall b. It can cause allergies in some people. c. It is less effective on gram negative cells than gram positive cells d. It affects peptidoglycan synthesis and may cause lysis 21. Antimicrobial agents that interact with phospholipids and cause leakage of proteins and ions are a. Polymyxins b. Quinolones c. Quinines d. Cephalosporins 22. More than half of the antimicrobic drugs used today are a. Macrolides b. Sulonamides c. Beta-lactams d. Aminoglycosides

Explanation / Answer

15. Phenol is not a halogen.

16. Hydrogen peroxide releses free radical to create pores in the cell it is not interact with protein only. So here hydrogen peroxide is the correct option.

17. Alchohol is found in more than one of all chemical antimicrobial agents.

18. Detergent is high level germicide.

19.Antibiotics are common metabolic product of aerobic bacteria.

20. All are correct.

21. Polymyxin binds with cell membrane and makes it more permeable.

22. Aminoglycosides.

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