Nutrition in Plants Test

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Nutrition in Plants Test - 8

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Weekly Quiz Competition

Question 1
1 / -0

Which type of cell has no nucleus and cell organelles, but it has a cell wall and ribosomes?

A
Plant cell

B
Animal cell

C
Bacterial cell

D
None of the above

Solution

Bacterial cell have no other cell organelles than ribosomes and have cell wall which helps in motility. Option C is correct.
Question 2
1 / -0

All living things are made up of__________.

A
Cells

B
Tissues

C
Organs

D
Organ system
Question 3
1 / -0

Leguminous plants produce_________.

A
pulses

B
vegetables

C
fruits

D
All of the above

Solution

Pulses (dals)are obtained from leguminous plants. Option A is correct.
Question 4
1 / -0

This type of cell needs a cell wall and chloroplasts?

A
Plant cell

B
Animal cell

C
Bacterial cell

D
All of the above

Solution

Plant cell needs a cell wall and chloroplast as these helps to perform their basic functions as plants. Option A is correct.
Question 5
1 / -0

All animals are categorised as

A
heterotrophs

B
saprophytes

C
parasites

D
Autotrophs

Solution

Animals derive nutrition from other organisms.
All animals are categorised as heterotrophs since they depend on plants and other animals for food.
Option A is correct.
Question 6
1 / -0

The main arena of various types of cellular activities is:

A
Nucleus

B
Plasma membrane

C
Mitochondria

D
Cytoplasm

Solution

The main arena of various types of cellular activities is the cytoplasm. Cytoplasm represents a bulk of protoplasm excluding nucleus and cell membrane. The cytoplasm has various types of cell organelles. Mitochondria, endoplasmic reticulum, Golgi apparatus, ribosomes etc. are some commonly seen cell organelles.
Question 7
1 / -0

The gas absorbed during photosynthesis is

A
Oxygen

B
Nitrogen

C
Ammonia

D
Carbon dioxide

Solution

Plant use energy from light to convert water and carbon dioxide into sugar and oxygen in a process called photosynthesis. Thus carbon dioxide is used in preparing food for the plants via a process called photosynthesis.
So the correct option 'Carbon dioxide'.
Question 8
1 / -0

The internal cellular energy reserve in autotrophs is

A
Glycogen

B
Protein

C
Starch

D
Fatty acid
Solution
Hint: Autotrophs can prepare their food through photosynthesis in the form of glucose. Some of it is utilized to support life processes, while some will be stored for future use as a polymer of glucose.

Part 1 - Glucose as a product of photosynthesis
Organisms with chlorophyll present in their cellular structure can convert $$CO_2$$ and $$H_2O$$ into sugar (glucose) by harvesting the energy from sunlight.
The reaction proceeds as follows:
$$CO_2\,(Carbon \,dioxide)+ H_2O\,(Water) \rightarrow C_6H_{12}O_6\, (Glucose)+ O_2\,(Oxygen)$$

Part 2 - Starch as a storage product
Food can not be stored in the form of glucose as it is a water-soluble molecule.
That is why extra glucose in the cytoplasm of a cell can change the osmotic concentration of that cell.
Starch on the other hand, is water-insoluble.
Starch is the polymer of glucose in which individual glucose molecules are joined by α-1,4 and α-1,6 glycosidic bonds.
Part 3 - Conclusion
From the above discussion we can conclude that glucose is the product of photosynthesis in autotrophs but it can't be stored in plant for longer time as it can drastically change the osmolarity of that particular cell.
Starch on the other hand is an inert and water insoluble molecule and is a perfect choice as a storage molecule.
Final step - The internal cellular energy reserve in autotrophs is starch.
Question 9
1 / -0

Which of the following statements about the autotrophs is incorrect?

A
They synthesize carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll.

B
They store carbohydrates in the form of starch.

C
They convert carbon dioxide and water into carbohydrates in the absence of sunlight.

D
They constitute the first trophic level in food chains.
Solution
- The primary producers present at the first trophic level in an ecosystem are autotrophic.
- These autotrophs perform photosynthesis wherein they use carbon dioxide and water in the presence of sunlight and chlorophyll to produce carbohydrates.
- CO$$_2$$ (Carbon dioxide) + H$$_2$$O (Water) $$\rightarrow$$ C$$_6$$H$$_{12}$$O$$_6$$ (Glucose) + O$$_2$$ (Oxygen)
- So, the correct answer is option C.
Question 10
1 / -0

What material is needed by green plants for photosynthesis?

A
Light

B
Chlorophyll

C
$$CO_{2}$$ and water

D
All of the above

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Re-Attempt Weekly Quiz Competition

Nutrition in Plants Test - 8

Result

Nutrition in Plants Test - 8

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SHARING IS CARING

Question 1

Plant cell

Animal cell

Bacterial cell

None of the above

Solution

Question 2

Cells

Tissues

Organs

Organ system

Question 3

pulses

vegetables

fruits

All of the above

Solution

Question 4

Plant cell

Animal cell

Bacterial cell

All of the above

Solution

Question 5

heterotrophs

saprophytes

parasites

Autotrophs

Solution

Question 6

Nucleus

Plasma membrane

Mitochondria

Cytoplasm

Solution

Question 7

Oxygen

Nitrogen

Ammonia

Carbon dioxide

Solution

Question 8

Glycogen

Protein

Starch

Fatty acid

Solution

Question 9

They synthesize carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll.

They store carbohydrates in the form of starch.

They convert carbon dioxide and water into carbohydrates in the absence of sunlight.

They constitute the first trophic level in food chains.

Solution

Question 10

Light

Chlorophyll

$$CO_{2}$$ and water

All of the above

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