S1T3T1&2

1. 1. A special technique for growing micro-organisms in the laboratory is

• A. Solution

• B. Culture

• B. Habitat

• D. Dilution

2. 2. To grow micro-organisms in the laboratory, one must need

• A. Salt and water

• B. Agar and salt

• C. Nutrient and water

• D. Agar and nutrient

3. 3. One of these micro-organism can cause food poisoning

• A. Salmonella enteriditis

• B. Housefly

• B. Spirogyra

• D. Eugene

The above sketch is a micro-organism growth curve. Use it to answer question 5 and 6.

The phase at which micro organism growth is reduce due to less nutrient and toxicity is .........

• A. B

• B. C

• C. A

• D. D

The exponential phase is labeled

• A. B

• B. D

• C. A

• D. C

The two major effects of micro-organism are

• A. Cause disease and use as food

• B. Cause food to spoil and use for animal feed

• C. Cause food to spoil and cause disease

• D. None of the above

The causative organism of malaria is

• A. Mosquito

• B. Bacteria

• C. Euglenia viridis

• C. Plasmodium falciparum

All of these are methods of controlling micro-organism except........

• A. Through antibiotic

• B. Through hydration

• C. Through high salinity

• D through high temperature

The most efficient and hygienic method of sewage disposal is...........

• A. Bucket latrine

• B. Chemical latrine

• C. Water-carriage system

• D. Pit latrine

The light penetrating zone of the marine habitat is called

• A. Aphotic zone

• B. Aerial zone

• C. Benthic zone

• D. Euphoric zone