Mineral Nutrition Test

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Mineral Nutrition Test - 60

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following does not possess Rhizobium containing nodules?

A
Pisum

B
Cicer

C
Phaseolus

D
Pinus
Solution
- Since above all options belong to the leguminous family and pinus is the sole genus in the subfamily Pinoideae.
So the correct option is "Pinus".
Question 2
1 / -0

Consider the following organisms:
1. Clostridium pasteurianum
2. Klebsiella pneumoniae
3. Thiobacillus ferrooxidans
Which of the above are free living nitrogen fixing organisms?

A
1 and 2

B
2 and 3

C
1 and 3

D
1, 2 and 3
Question 3
1 / -0

Nitrogen fixation is

A
Nitrogen $$\rightarrow$$ Ammonia

B
Nitrogen $$\rightarrow$$ Nitrates

C
Nitrogen $$\rightarrow$$ Amino acid

D
Both A and B
Solution
Correct option: D
Explanation:
Nitrogen fixation is the conversion of nitrogen present in the air to nitrogenous compounds in the soil.
They are either converted by the nitrifying bacteria or the nitrogen-fixing bacteria present in association with plant roots.
Nitrogen fixation help increase the fertility of the soil.
Nitrogen is converted to both ammonia and nitrates in the soil.
Hence, nitrogen fixation is "both A and B".
Question 4
1 / -0

Which of the following is NOT a free living nitrogen fixing bacterium?

A
Azotobacter

B
Rhizobium

C
Clostridium

D
Azospirillum
Question 5
1 / -0

Deficiency of Boron leade to the deficiency symptoms of _________.

A
N

B
$$ K^+$$

C
$$Ca^{++}$$

D
$$ Na^{+}$$
Question 6
1 / -0

Find out the odd one in nitrogen cycle

A
Pseudomonas

B
Clostridium

C
Nostoc

D
Rhizobium

Solution

Reduction of nitrates to nitrogen gas is called denitrification. Pseudomonas is a denitrifying bacteria. Denitrification is the process that converts nitrate to nitrogen gas, thus removing bioavailable nitrogen and returning it to the atmosphere.
While Clostridium, Nostoc, Rhizobium are all nitrogen-fixing bacteria that convert free nitrogen into forms used by plants.

So the correct option is "Pseudomonas".
Question 7
1 / -0

An association which fixes nitrogen through non-nodulation is

A
Maize roots with Spirillium notatum

B
Digitaria roots with Spirillium notatium

C
Coralloid roots of Cycas with Anabaena

D
All the above

Solution

Cycas has coralloid roots in association with Anabaena or Nostoc. Cycas form a symbiotic nitrogen-fixing association but without nodule formation.

So the correct option is "Coralloid roots of Cycas with Anabaena".
Question 8
1 / -0

Which is wrongly matched?

A
Rhizobium - Free living nitrogen fixer

B
Humus - Abiotic component

C
Phosphorous cycle - Sedimentary

D
Cedrus deodara - Coniferous forest

E
Shorea robusta - Tropical deciduous forest

Solution

Rhizobium live as aerobes under the free-living conditions (where nitrogenase is not optional), but during nitrogen-fixing events, they become anaerobic(thus protecting the nitrogenase enzyme).

So the correct option is "Rhizobium-free living nitrogen fixer".".
Question 9
1 / -0

Old leguminous roots turn green due to

A
Conversion of leghaemoglobin to chl a

B
Breakdown of leghaemoglobin

C
Conversion of leghaemoglobin to chl b

D
Conversion of leghaemoglobin to chl c

Solution

Because old legume plant is not able to synthesize leg-hemoglobin properly or we can say that there is a breakdown of leg-hemoglobin(pink colored protein) So the old legume plant turns green.
So the correct option is "breakdown of leghaemoglobin".
.
Question 10
1 / -0

Chlorosis is caused by the deficiency of.

A
Chlorine and boron

B
Nitrogen and calcium

C
Magnesium and iron

D
Potassium and phosphorus

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Mineral Nutrition Test - 60

Result

Mineral Nutrition Test - 60

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SHARING IS CARING

Question 1

Pisum

Cicer

Phaseolus

Pinus

Solution

Question 2

1 and 2

2 and 3

1 and 3

1, 2 and 3

Question 3

Nitrogen $$\rightarrow$$ Ammonia

Nitrogen $$\rightarrow$$ Nitrates

Nitrogen $$\rightarrow$$ Amino acid

Both A and B

Solution

Question 4

Azotobacter

Rhizobium

Clostridium

Azospirillum

Question 5

N

$$ K^+$$

$$Ca^{++}$$

$$ Na^{+}$$

Question 6

Pseudomonas

Clostridium

Nostoc

Rhizobium

Solution

Question 7

Maize roots with Spirillium notatum

Digitaria roots with Spirillium notatium

Coralloid roots of Cycas with Anabaena

All the above

Solution

Question 8

Rhizobium - Free living nitrogen fixer

Humus - Abiotic component

Phosphorous cycle - Sedimentary

Cedrus deodara - Coniferous forest

Shorea robusta - Tropical deciduous forest

Solution

Question 9

Conversion of leghaemoglobin to chl a

Breakdown of leghaemoglobin

Conversion of leghaemoglobin to chl b

Conversion of leghaemoglobin to chl c

Solution

Question 10

Chlorine and boron

Nitrogen and calcium

Magnesium and iron

Potassium and phosphorus

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