Microbes in Hum...

Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Blue green algae are popular as biofertilizers.

Reason (R) : Blue green algae cause algal bloom in polluted water bodies

Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Rhizobium leguminosarum is a symbiotic bacterium found in the root nodules of leguminous plants.

Reason (R) : They have the ability to fix atmospheric nitrogen.

Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Cyanobacteria increase the soil fertility and also add organic matter to the soil.

Reason (R) : They can fix free nitrogen in the atmosphere.

Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Methanogens do not produce oxygen.

Reason (R) : Methanogens are obligate anaerobic microorganisms.

Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : An inoculum of curd is used for curdling of milk.

Reason (R) : It contains Lactobacillus, which improves nutritional quality by increasing Vitamin B₁₂.

Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Bottled fruit juices bought from the market are clearer as compared to those made at home.

Reason (R) : They are clarified by pectinases and proteases.

Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Statin is produced by a yeast called Trichoderma polysporum.

Reason (R) : It lowers the blood cholesterol level in the body.

Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Activated sludge should have the ability to settle quickly.

Reason (R) : To absorb pathogenic bacteria present in wastewater while sinking to the bottom of the settling tank.

Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Nucleopolyhedrovirus are useful as they are good biocontrol agents.

Reason (R) : They are species-specific, narrow spectrum bioinsecticides.

Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A) : Members of the genus Glomus from mycorrhiza.

Reason (R) : Mycorrhiza is an association of plants and fungi.