Biology In Human Welfare - Category Wise Question And Answer Practice Test With Solutions

Question : 1

Which one of the following statement is true?

a) The lesser the BOD of waste water, more is its polluting potential.

b) The greater the BOD of waste water, more is its polluting potential.

c) The greater the BOD of waste water, less is its polluting potential.

d) The lesser the BOD of waste water, less is its polluting potential.

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Question : 2

Important objective of biotechnology in agriculture section is

a) to decrease the seed number

b) to produce pest resistant varieties of plant

c) to increase the nitrogen content

d) to increase the plant weight

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Question : 3

Cheese and Yogurt are products obtained by

a) fermentation

b) distillation

c) pasteurization

d) dehydration

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Question : 4

Which gas is responsible for the puffed-up appearance of dough ?

a) SO₂

b) CO₂

c) O₂

d) NO₂

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Question : 5

Streptokinase which is used as a ‘clot buster’ obtained from

a) Lactobacillus

b) Streptococcus

c) Staphylococcus

d) Saccharomyces

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