Microbes in Human Welfare Test

Result

Microbes in Human Welfare Test - 7

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Antibiotic(s) obtained from bacillus species is/are

A
penicillin

B
polymyxins

C
cephalosporin

D
griseofulvin

Solution

Polymyxin is derived from the bacterium Bacillus polymyxa, and is an anti-biotic. Polymyxins B and E (also known as colistin) are used in the treatment of Gram-negative bacterial infections. They work mostly by breaking up the bacterial cell membrane. They are part of a broader class of molecules called nonribosomal peptides.
Question 2
1 / -0

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

A
Rhizopus stolonifer

B
Saccharomyces cerevisiae

C
Penicillium notatum

D
Mucor indicus

Solution

Rhizopus stolonifer helps in the production of commercial drugs using alcohol. It is also called black bread mold and causes fruit rot on strawberry, tomato, and sweet potato and used in commercial production of fumaric acid and cortisone.
Question 3
1 / -0

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

A
anti-fertility pill

B
anti-coagulant

C
anti-AIDS drug

D
anti-cancer drug

Solution

Diosgenin is a crystalline compound obtained from yam (Dioscorea) and is used in the synthesis of steroidal hormones. It is the precursor for cortico steroids, anti-inflammatory, and anti-fertility drugs.
Question 4
1 / -0

Thuriside, a proteinaceous toxin, is obtained from

A
biofertilisers

B
green manure

C
bacterial culture

D
farmyard manure

Solution

Thuriside is produced by the soil bacterium Bacillus thuringiensis israelensis.
Question 5
1 / -0

Which of the following vaccines belongs to the second generation?

A
BCG

B
Polio vaccine

C
Hepatitis-B vaccine

D
Small pox vaccine

Solution

Second generation vaccines were developed to reduce the risks from live vaccines. These are subunit vaccines, consisting of specific protein antigens (such as tetanus or diphtheria toxoid) or recombinant protein components (such as the hepatitis B surface antigen). They can generate T_H and antibody responses, but not killer T cell responses.

Question 6

1 / -0

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

Solution

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

Biogas includes methane as one of its important components and methanogens are used mainly in the production of biogas. Methanogens are microorganisms that produce methane as a metabolic byproduct in hypoxic conditions. Gasohol, a biofuel, is produced by the help of Saccharomyces cerevisiae. Penicillium roqueforti is the filamentous fungus that proliferates within the blue-vein cheese including Roquefort, Gorgonzola, Stilton, and Danish Blue. Hence, Penicillium roqueforti is used in cheese production. Pseudomonas strains are capable of degrading petroleum hydrocarbons and are hence useful in clearing oil spills in oceans.

Question 7

1 / -0

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)

Solution

Fumaric acid - Rhizopus nigricans
Oxalic acid - Aspergillus niger
Kojic acid - Aspergillus oryzae
Itaconic acid - Aspergillus terreus

Question 8
1 / -0

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.

A
Both (a) and (b)

B
Only (c)

C
(b), (c) and (d)

D
(c), (d) and (e)

Solution

All the three statements are true. Hence, this option is correct.
Question 9
1 / -0

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.

A
Only (a)

B
Only (b)

C
Only (c)

D
None of these

Solution

Methanogens are bacteria that produce methane gas. As a result of their metabolism, they can be used as sources of biogas. Methanogens are anaerobic.
Question 10
1 / -0

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

A
the bacteria that use organic compounds as a source of energy and carbon

B
the bacteria that are able to synthesise their own organic food from inorganic substances

C
the bacteria that live in a mutually beneficial association with other organisms

D
the bacteria that manufacture organic compounds from inorganic raw materials utilising energy liberated from the oxidation of inorganic substances

Solution

Treatment of waste water is done by heterotrophic microbes naturally present in the sewage. These are the bacteria that use organic compounds as a source of energy and carbon.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Microbes in Human Welfare Test - 7

Result

Microbes in Human Welfare Test - 7

Score

-

Rank

-

SHARING IS CARING

Question 1

penicillin

polymyxins

cephalosporin

griseofulvin

Solution

Question 2

Rhizopus stolonifer

Saccharomyces cerevisiae

Penicillium notatum

Mucor indicus

Solution

Question 3

anti-fertility pill

anti-coagulant

anti-AIDS drug

anti-cancer drug

Solution

Question 4

biofertilisers

green manure

bacterial culture

farmyard manure

Solution

Question 5

BCG

Polio vaccine

Hepatitis-B vaccine

Small pox vaccine

Solution

Question 6

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

Solution

Question 7

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)

Solution

Question 8

Both (a) and (b)

Only (c)

(b), (c) and (d)

(c), (d) and (e)

Solution

Question 9

Only (a)

Only (b)

Only (c)

None of these

Solution

Question 10

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

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.