Microbes in Human Welfare Test

Result

Microbes in Human Welfare Test - 41

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

Most active nitrogen fixing blue-green algae of rice fields is

A
Anabaena azollae

B
Aulosira fertilissima

C
Cylindrospermum licheniforme

D
Nostoc cycadacearum

Solution

Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial environments many of which can fix atmospheric nitrogen. In paddy fields, cyanobacteria serve as an important biofertilizer.
Aulosira fertilissima is the most active non-symbiotic nitrogen fixer in rice field in India. Hence, Option B is correct.
Question 2
1 / -0

Yoghurt is produced with the help of

A
Lactobacillus bulgaricus

B
Lactobacillus thermophilus

C
Streptococcus thermophilus

D
Both A and C

Solution

We use microbes or products derived from them everyday. There are various microbes that help us produces so many dairy products. For eg. Yoghurt is produced commercially with the help of Lactobacillus bulgaricus and Streptococcus thermophilus
So, the correct answer is 'Both A and C'
Question 3
1 / -0

BGA is chiefly used as fertilizer in

A
Wheat

B
Paddy

C
Mustard

D
Gram

Solution

BGA is chefly used as fertilizer in paddy fields for paddy crops.
Correct answer-B
Question 4
1 / -0

The fermenting agent of dosa and idli is

A
Saccharomyces cerevisiae

B
Leuconostoc mesenteroides

C
Streptococcus faecalis

D
Both B and C
Question 5
1 / -0

Biofertilizers include

A
Cowdung manure and farmyard waste

B
A quick growing crop ploughed back

C
BGA/Anabaena and Azolla

D
All the above

Solution

A biofertilizer is any biologically derived or biological substance that can be used as a fertilizer to enrich the soil's nutrients. So, all the above substances can work as biofertilizers.
Correct option-D
Question 6
1 / -0

Which one is not used in the production of Yoghurt?

A
Streptococcus lactis

B
Streptococcus thermophilus

C
Lactobacillus bulgaricus

D
Acetobacter aceti

Solution

Yoghurt are produced from cultures of Lactobacillus and Streptococcus.Acetobacter aceti has no role in production of yoghurt.
Correct answer-D
Question 7
1 / -0

Aquatic fern which is an excellent biofertilizer is

A
Salvinia

B
Azolla

C
Marsilea

D
Pteridium
Solution
Correct Option: B
Explanation:
$${\textit{Azolla pinnata}}$$ is an aquatic plant with fronds that float on the water's surface.
Because fast currents and waves break up the plant, it flourishes in calm and slow-moving bodies of water.
It is an excellent biofertilizer.
$${\textit{Pteridium aquilinum}}$$, often known as "eagle fern," is a temperate and subtropical fern found in both hemispheres.
It does not serve as a biofertilizer.
$${\textit{Marsilea}}$$ is a genus of over 65 species of aquatic ferns in the $${\textit{Marsileaceae}}$$ family.
It does not serve as a biofertilizer.
$${\textit{Salvinia}}$$, a genus in the $${\textit{Salviniaceae}}$$ family, is a floating fern named after Anton Maria Salvini.
It does not serve as a biofertilizer.
Hence, aquatic fern which is an excellent biofertilizer is $${\textit{Salvinia}}$$.
Question 8
1 / -0

Azolla possesses symbiotic association with

A
Anabaena

B
Nostoc

C
Azospirillum

D
Rhizobium
Question 9
1 / -0

Which group is responsible for formation and flavour of yogurt?

A
Bacillus megathermus and Xanthomonas sp.

B
Bacillus subtilis and E.coli

C
Rhizobium meliloti and Azotobacter

D
Lactobacillus casei and Streptococcus thermophilus

Solution

Lactobacillus casei and Streptococcus thermophilus that are capable of lactic acid fermentation are used in the flavouring of yogurt.
Correct answer-D
Question 10
1 / -0

A third generation pesticide is

A
Pheromone

B
Weedicide

C
Juvenile hormone analogue

D
Both A and B

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Microbes in Human Welfare Test - 41

Result

Microbes in Human Welfare Test - 41

Score

-

Rank

-

SHARING IS CARING

Question 1

Anabaena azollae

Aulosira fertilissima

Cylindrospermum licheniforme

Nostoc cycadacearum

Solution

Question 2

Lactobacillus bulgaricus

Lactobacillus thermophilus

Streptococcus thermophilus

Both A and C

Solution

Question 3

Wheat

Paddy

Mustard

Gram

Solution

Question 4

Saccharomyces cerevisiae

Leuconostoc mesenteroides

Streptococcus faecalis

Both B and C

Question 5

Cowdung manure and farmyard waste

A quick growing crop ploughed back

BGA/Anabaena and Azolla

All the above

Solution

Question 6

Streptococcus lactis

Streptococcus thermophilus

Lactobacillus bulgaricus

Acetobacter aceti

Solution

Question 7

Salvinia

Azolla

Marsilea

Pteridium

Solution

Question 8

Anabaena

Nostoc

Azospirillum

Rhizobium

Question 9

Bacillus megathermus and Xanthomonas sp.

Bacillus subtilis and E.coli

Rhizobium meliloti and Azotobacter

Lactobacillus casei and Streptococcus thermophilus

Solution

Question 10

Pheromone

Weedicide

Juvenile hormone analogue

Both A and B

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.