Microbes in Human Welfare (Class

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Microbes in Human Welfare (Class - XII)

Description: Microbes in Human Welfare (Class - XII)
Number of Questions: 15
Created by: Girish Devgan
Tags: Microbes in Human Welfare (Class - XII) Microbes in Industrial Products Microbes in Human Welfare Biology Microbes in Plants Biology in Human Welfare Microbes in Household Products Microbes in Production of Biogas Microbes in Sewage Treatment

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The commercial production of drugs from alcohol is possible by using a fungus called

Rhizopus stolonifer
Saccharomyces cerevisiae
Penicillium notatum
Mucor indicus

Steroid diosgenin obtained from a yam (Dioscorea) is used to make an

anti-fertility pill
anti-coagulant
anti-AIDS drug
anti-cancer drug

Antibiotic(s) obtained from bacillus species is/are

penicillin
polymyxin B and polymyxin E
cephalosporin
fluoroquinolone

Cow dung used for biogas production is rich in

Rhizobium
Methanobacterium
Acetobacter aceti
Lactobacillus
All of the above

Thuriside, a proteinaceous toxin, is obtained from

biofertilisers
green manure
bacterial culture
farmyard manure

Which of the following vaccines belongs to the second generation?

BCG
Polio vaccine
Hepatitis-B vaccine
Small pox vaccine

Which of the following statements is/are true regarding the microbe Lactobacillus?

(a) It grows in milk and converts it into cheese. (b) It grows in curd. (c) It is commonly called lactic acid bacterium. (d) LAB produces acids that coagulate and partially digest the milk proteins. (e) It improves the nutritional quality of the milk.

Both (a) and (b)
Only (c)
(b), (c) and (d)
(c), (d) and (e)
Both (b) and (e)

Biofertilisers are organisms that enrich the nutrient quality of the soil. Which of the following microbes are used as biofertilisers?

Bacteria
Cyanobacteria
Algae
All of the above

Which of the following statements is/are false regarding methanogens (Methanobacteria)?

(a) They grow anaerobically. (b) These bacteria are also present in the rumen of cattle. (c) They help produce biogas.

Only (a)
Only (b)
Only (c)
None of these
Both (a) and (b)

Match the following:


Column - I	Column - II
A. Biogas	i. Pseudomonas putida
B. Oil pollution	ii. Saccharomyces cerevisiae
C. Gasohol	iii. Penicillium roqueforti
D. Cheese production	iv. Methanogens

A – iii, B – iv, C – i, D – ii
A – iv, B – i, C – ii, D – iii
A – iv, B – ii, C – iii, D – i
A – iii, B – iv, C – ii, D – i

Treatment of waste water is done by heterotrophic microbes naturally present in the sewage. These microbes are

the bacteria that use organic compounds as a source of energy and carbon
the bacteria that are able to synthesise their own organic food from inorganic substances
the bacteria that live in a mutually beneficial association with other organisms
the bacteria that manufacture organic compounds from inorganic raw materials utilising energy liberated from the oxidation of inorganic substances
None of these

The dough which is used for making bread, is fermented by using baker’s yeast. What is the scientific name of this yeast?

Staphylococcus
Penicillium notatum
Aspergillus niger
Saccharomyces cerevisiae
None of these

Which of the following bacteria is used to remove clots in heart patients?

Streptococci
Lactobacillus
Methanobacterium
Anabaena
Aspergillus

Match the following:


1	Lipase	a	In bottled juices
2	Pectinase	b	To remove clots
3	Streptokinase	c	In laundry detergents

1 - a, 2 - c, 3 - b
1 - b, 2 - c, 3 - a
1 - c, 2 - a, 3 - b
1 - c, 2 - b, 3 - a
1 - b, 2 - a, 3 - c

Match the columns:


Column I	Column II
A. Fumaric Acid

B. Oxalic acid
C. Kojic acid
D. Itaconic acid | (1) Streptococcus lactis (2) Aspergillus terreus
(3) Aspergillus niger (4) Rhizopus nigricans (5) Aspergillus oryzae|

A – (5), B – (3), C – (2), D – (4)
A – (4), B – (3), C – (5), D – (2)
A – (1), B – (5), C – (3), D – (4)
A – (2), B – (4), C – (1), D – (5)

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Microbes in Human Welfare (Class - XII)

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