4 If you were preparing mutrient agar at home and did sot have an autoclave, wha

Question

4 If you were preparing mutrient agar at home and did sot have an autoclave, what can you use to steniline the nutrient agar? a Hydrogen peroxide b. Boiling for one hour c Oven at 121 0C for 15 minutes d. Bleach Pressure cooker at 47- Which of the following is the most resistant to chemical biocides? a. Viruses with lipid envelopes b. Mycobacteria c. Protozoan cysts d Gram-negative hackeria e. Gram-positive bacteria The term used to describe a disease-causing microorganism is: a. Virus b. Microbe e. Pathogen d. Infection E. Bacterium 49. The formal system for classifying and naming organisms was developed by a Robert Koch b. Victor Santos c. Carolus Linnacus d. Louis Pasteur e. Aristotle 50- Antibiotics are produced by a. Protozoa Page 8

Explanation / Answer

46-

In case of the oven, we need to have around 180-degree Celsius temperature.

Boiling doesn't autoclave the media.

H2O2 doesn't kill all kinds of bacteria so it will not work.

Bleach will not kill all kinds of bacteria so it will not work.

Using pressure will help us in autoclaving.

So the answer is option E- the pressure cooker.

47- Chemical biocides are the chemical agents which destroy any harmful organisms.

Any organism becomes resistant to chemical biocide if it somehow able to maintain the concentration of biocide at such a level that it becomes harmless to it.

Mycobacterium has the cell wall which is rich in lipid which helps it to protect itself from the lethal concentration of biocide.

So answer is option B- Mycobacterium

48- Pathogen is the microorganism which causes diseases. the pathogen may be the virus, bacteria, protozoa and even fungus

So, answer is option C- Pathogen

49-

Carolus Linnaeus also called the father of taxonomy had given the two systems of classification. He also gave the Binomial nomenclature

SO answer is option C.

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