Nutrition in Plants Test

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Nutrition in Plants Test - 14

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is true about saprophytes?

A
They trap insects to meet their nitrogen requirement.

B
They live on decaying organic matter.

C
They share their food and shelter.

D
Saprophytes contain chlorophyll.

Solution

A saprophyte or saprotroph is an organism that gets its nutrition and energy from dead and decaying organic matter. These may be decaying parts of plants or animals. This means that saprophytes are heterotrophs. They are consumers in the food chain. This is a phenomenon observed in Fungi.

So, the correct answer is 'B'.
Question 2
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Which of the following statements is incorrect about leghaemoglobin?

A
It acts as $$O_2$$ scavenger

B
It imparts pink or red colour to the nodules

C
It combines with $$O_2$$ and protects nitrogenase

D
It is a Mo-Fe protein.
Question 3
1 / -0

Stomata are present on the underside of the __________.

A
Flower

B
Fruit

C
Seed

D
Leaf

Solution

Stomata consist of openings (stomatal pores) surrounded by the guard cells. These are present mostly on the underside of the leaves and perform the functions of exchange of gases and transpiration.
Hence, the correct answer is 'Leaf'.
Question 4
1 / -0

The correct statement(s) among I to III with respect to potassium ions that are abundant within the cell fluids is/are:
(i) Along with sodium ions, they are responsible for the transmission of nerve signals.
(ii) Potassium plays an important role in maintaining resting membrane potential across the cell membrane.
(iii) Potassium is an essential mineral needed to regulate water balance, blood pressure and levels of acidity.

A
I and III only

B
I and II only

C
I, II and III

D
III only
Question 5
1 / -0

The nodules present in the leguminous plants appear pink in colour due to the presence of

A
RBC.s

B
leghaemoglobin

C
nitrogenase enzyme

D
bacterial secretion
Question 6
1 / -0

_______ conditions are created by leghaemoglobin in the root nodule of a legume.

A
Aerobic

B
Anaerobic

C
Acidic

D
Alkaline
Question 7
1 / -0

Function of leghaemoglobin (a red pigment) in root nodules of leguminous plants is:

A
To regulate $$O_2$$ supply in cells.

B
To regulate $$CO_2$$ supply in cells.

C
To regulate production of phenolic compounds.

D
To regulate the Mo supply in cells.

Solution

Leghemoglobin supports the centralization of free oxygen in the cytoplasm of contaminated plant cells to guarantee the best possible capacity of root knobs.
Its capacity is to help give oxygen to the breathing harmonious bacterial cells in root nodules of leguminous plants in a way practically equivalent to hemoglobin transporting oxygen to breathing tissues in creatures.
Thus, the correct answer is option A- 'to regulate O$$_2$$ supply in cells.'
Question 8
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Organisms which prepare food for themselves using simple naturally available raw materials are referred to as

A
Heterotrophs

B
Autotrophs

C
Parasites

D
Saprophytes

Solution

An organism that prepares food for itself using Carbon dioxide, water in the existence of 'sunlight' and 'chlorophyll' is referred to as 'autotrophs'.
Heterotrophs depend on other autotrophs for nutrition.
Parasites live inside other organisms and depend on that organism for nutrition.
Saprophytes feed on dead decaying organisms.
Thus, the correct answer is option (b).
Question 9
1 / -0

The term that is used for the mode of nutrition in yeast, mushroom and bread mould is ________.

A
Autotrophic

B
Insectivorous

C
Saprophytic

D
Parasitic

Solution

Yeast, mushroom, and bread mould (Rhizopus) are saprophytic because they obtain food from decaying and dead matter.
So, the correct answer is option (C).
Question 10
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Select the correct statement(s).

A
Heterotrophs do not synthesise their own food.

B
Heterotrophs utilise solar energy for photosynthesis

C
Heterotrophs synthesise their own food

D
Heterotrophs are capable of converting carbon dioxide and water into carbohydrates.

Solution

A. Heterotrophs do not synthesise their own food.
Solution : Heterotrophs are the organisms that cannot synthesize their own food and derive it from other sources directly or indirectly and autotrophs are the organisms like plants that synthesize their own food by help of co2 and water.
So the correct answer is " Heterotrophs do not synthesise their own food.".

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Re-Attempt Weekly Quiz Competition

Nutrition in Plants Test - 14

Result

Nutrition in Plants Test - 14

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SHARING IS CARING

Question 1

They trap insects to meet their nitrogen requirement.

They live on decaying organic matter.

They share their food and shelter.

Saprophytes contain chlorophyll.

Solution

Question 2

It acts as $$O_2$$ scavenger

It imparts pink or red colour to the nodules

It combines with $$O_2$$ and protects nitrogenase

It is a Mo-Fe protein.

Question 3

Flower

Fruit

Seed

Leaf

Solution

Question 4

I and III only

I and II only

I, II and III

III only

Question 5

RBC.s

leghaemoglobin

nitrogenase enzyme

bacterial secretion

Question 6

Aerobic

Anaerobic

Acidic

Alkaline

Question 7

To regulate $$O_2$$ supply in cells.

To regulate $$CO_2$$ supply in cells.

To regulate production of phenolic compounds.

To regulate the Mo supply in cells.

Solution

Question 8

Heterotrophs

Autotrophs

Parasites

Saprophytes

Solution

Question 9

Autotrophic

Insectivorous

Saprophytic

Parasitic

Solution

Question 10

Heterotrophs do not synthesise their own food.

Heterotrophs utilise solar energy for photosynthesis

Heterotrophs synthesise their own food

Heterotrophs are capable of converting carbon dioxide and water into carbohydrates.

Solution

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