Microorganisms Friend And Foe Test

Result

Microorganisms Friend And Foe Test - 29

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Weekly Quiz Competition

Question 1
1 / -0

Food is preserved at low temperature because

A
Bacterial attack is minimised

B
For easy cooking

C
For easy digestion

D
All the above

Solution

Food products like fruits and vegetables are kept at low temperature to maintain its freshness, longevity and taste. Respiration uses stored starch and enhances ageing process. Low temperature minimizes the bacterial attack on food and also decreases respiration rate.
Thus, the correct answer is option A.
Question 2
1 / -0

Antibiotics are

A
Drugs to kill viruses

B
Antimicrobial agents

C
Anti-psychotic agents

D
Bacteria that fix nitrogen
Solution
(A) Correct answer: B
(B) Explanation of correct answer:
Antibiotic are antimicrobial agents which are released by soil bacteria or fungi and inhibit the growth of other bacteria.
It is used to fight bacterial infection.
However, it is not useful in viral infection. It acts by either killing bacteria or preventing their reproduction
Question 3
1 / -0

Lactobacillus mediated change of milk to curd occurs due to

A
Coagulation and partial digestion of milk fats

B
Coagulation and partial digestion of milk proteins

C
Coagulation of milk proteins and complete digestion of milk fats

D
Coagulation of milk fats and complete digestion of proteins

Solution

The conversion of milk into curd takes place due to Lactobacillus. It converts the lactose sugar of milk into lactic acid, which results in the coagulation and partial digestion of milk protein (casein).
So, the correct answer is option B.
Question 4
1 / -0

Yeast is used in the production of .............

A
sugar

B
alcohol

C
Hydrochloric acid

D
oxygen
Question 5
1 / -0

Microbes are present in

A
Soil

B
Polluted water

C
Thermal vents

D
All of the above

Solution

Microbes are omnipresent, which means they are found everywhere. They can be found in soil, water, air, ice, inside bodies of human beings, animals, and plants, and even in thermal vents.
Question 6
1 / -0

Habitat is associated with the ______ one lives in.

A
political area

B
geographical area

C
demographic area

D
none of the above

Solution

Habitat is associated with the geographical area one lives in.
Question 7
1 / -0

Which of the following is a partial root parasite?

A
Sandal wood

B
Mistetone

C
Orobanche

D
Ganodema

Solution

Parasites can be divided into holoparasties and hemiparasites. Holoparasites are those which are dependent on their host for all of their requirements, while hemiparasites are those, which receive only a part of their nourishment from host holoparasities and hermaphrodites are also known as complete and partial parasites, respectively, sandal wood is partial root parasite which synthesis its own food but is dependent on hoot's roots for water and inorganic nutrients. So, the correct answer is 'Sandal wood'.
Question 8
1 / -0

Why do antibiotics kill bacteria but not viruses?

A
Antibiotics stimulate the immune system against bacteria but not viruses.

B
Viruses have a ways of blocking antibiotics.

C
Viruses are too small to be affected by antibiotics.

D
Viruses do not have a metabolism.
Solution
- Bacteria (except in spore stage) must be continuously metabolically active most of the time and thus a bacterial infection can be cured. Viruses are metabolically inert until they enter a host cell and thus they are not susceptible to the actions of antivirals until then. An exception would be drugs that block viral adhesion to host cells, thus preventing their entry.
- The virus often hijacks host genome, thus their protein can be closely related to host proteins. So it is difficult to distinguish between host and virus proteins.
- The virus does not have a cell wall as bacteria. Antibiotics stop the making of a cell wall in bacteria. Thus they remain unaffected by antibiotics.
So the correct answer is option D.
Question 9
1 / -0

Hepatitis-B is caused due to:-

A
Virus

B
Protozoa

C
Bacteria

D
Fungi
Question 10
1 / -0

One third of the global cases of Tuberculosis is in

A
Britain

B
Sweden

C
India

D
China

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Microorganisms Friend And Foe Test - 29

Result

Microorganisms Friend And Foe Test - 29

Score

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Rank

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SHARING IS CARING

Question 1

Bacterial attack is minimised

For easy cooking

For easy digestion

All the above

Solution

Question 2

Drugs to kill viruses

Antimicrobial agents

Anti-psychotic agents

Bacteria that fix nitrogen

Solution

Question 3

Coagulation and partial digestion of milk fats

Coagulation and partial digestion of milk proteins

Coagulation of milk proteins and complete digestion of milk fats

Coagulation of milk fats and complete digestion of proteins

Solution

Question 4

sugar

alcohol

Hydrochloric acid

oxygen

Question 5

Soil

Polluted water

Thermal vents

All of the above

Solution

Question 6

political area

geographical area

demographic area

none of the above

Solution

Question 7

Sandal wood

Mistetone

Orobanche

Ganodema

Solution

Question 8

Antibiotics stimulate the immune system against bacteria but not viruses.

Viruses have a ways of blocking antibiotics.

Viruses are too small to be affected by antibiotics.

Viruses do not have a metabolism.

Solution

Question 9

Virus

Protozoa

Bacteria

Fungi

Question 10

Britain

Sweden

India

China

User

Question Analysis

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