CBSE Class 12 Microbes in Human Welfare Multiple Choice Questions with Answers. MCQ Questions Class 12 Microbes in Human Welfare with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT MCQ questions Class 12 Microbes in Human Welfare with Answers to know their preparation level.
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MCQ Questions Class 12 Microbes in Human Welfare with Answers - Set - 2
Question 1:
Crop rotation is used by farmers to increase
(a) Soil fertility
(b) Nitrogenous content of soil
(c) Organic content of soil
(d) All of these
Correct Answer – (A)
Question 2:
Due to which of the following organism, yield of rice is increased?
(a) Anabaena
(b) Bacillus popilliae
(c) Sesbania
(d) Bacillus polymena
Correct Answer – (A)
Question 3:
Which one of the following plants are used as green manure in crop fields and in sandy soils?
(a) Crotalaria juncea and Alhagi camelorum
(b) Calotropis procera and Phyllanthus niruri
(c) Saccharum munja and Lantana camara
(d) Dichanthium annulatum and Azolla nilotica
Correct Answer – (A)
Question 4:
One of the following is a biofertilizer
(a) CMU
(b) DCMU
(c) VAM
(d) Agent orange
Correct Answer – (C)
Question 5:
Which of the following plants is used as biofertilizer?
(a) Nostoc
(b) Funaria
(c) Volvox
(d) Rhizopus
Correct Answer – (A)
MCQ Questions Class 12 Microbes in Human Welfare With Answers
Question 6:
Which one of the following plant is commonly used as green manure
(a) Dalbergia sisso
(b) Acacia nilotica
(c) Cassia fistula
(d) Crotalarca juncea
Correct Answer – (D)
Question 7:
Cyanobacteria helps farmers by
(a) Reducing the alkalinity of the soil
(b) Reducing the acidity of the soil
(c) Neutralising the alkalinity of the soil
(d) Water logging
Correct Answer – (B)
Question 8:
Biofertilisers give better yield when added along with
(a) Phosphate
(b) Calcium
(c) Nitrogen
(d) Urea
Correct Answer – (A)
Question 9:
Drinking of mineral water with very low levels of pesticides (about 0.02ppm) for long period may
(a) produce immunity against mosquito
(b) cause leukemia in most people
(c) cause cancer of the intestine
(d) lead to accumulation of pesticide residues in body fat
Correct Answer – (D)
Question 10:
Humulin is the term used for
(a) A new antibiotic
(b) A sex hormone
(c) Human insulin
(d) A vaccine
Correct Answer – (C)
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