Photosynthesis in Higher Plants Test

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Photosynthesis in Higher Plants Test - 15

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Weekly Quiz Competition

Question 1
1 / -0

$$C_{4}$$ plants are found among ____________.

A
Gramineae only

B
Monocots only

C
Dicots only

D
Monocots as well as dicots
Solution
In $$C_4$$ the light-dependent reactions and the Calvin cycle are physically separated, with the light-dependent reactions occurring in the mesophyll cells (spongy tissue in the middle of the leaf) and the Calvin cycle occurring in special cells around the leaf veins. These cells are called bundle-sheath cells.
$$C_4$$ plants are so-called because the first product of $$CO_2$$ fixation is a $$C_4$$ organic acid, oxaloacetate, formed by the carboxylation of phosphoenolpyruvate (PEP) by PEP carboxylase.
$$C_4$$ plants are mostly monocot plants including maize, sugarcane, and sorghum and some dicots.
So, the correct option is D.
Question 2
1 / -0

The photosynthesis pigments via, erythrolable, chlorolable and cyanolable respectively are

A
Green,Red,Blue

B
Red,Blue,Green

C
Red,Green,Blue

D
Blue,Green,Red
Question 3
1 / -0

Chloroplast fixes

A
O$$_{2}$$

B
H$$_{2}$$

C
CO$$_{2}$$

D
N$$_{2}$$

Solution

Chloroplast fixes carbon dioxide into carbohydrates. The chloroplast is the plastid, which contains chlorophyll, the photosynthetic pigment. The photosynthetic reaction takes place in two stages light reaction and dark reaction where ATP and NADPH$$_2$$ is formed during light reaction while the carbon dioxide fixation takes place in the dark reaction of photosynthesis.
So, the correct answer is option C.
Question 4
1 / -0

During photosynthesis

A
$$O_{2}$$ evolved comes from $$CO_{2}$$

B
ATP is formed

C
ATP is not formed

D
Water is required as medium but it does not take part in photosynthesis

Solution

Photosynthesis is an anabolic process, which helps in forming ATP, where it is called as energy currency. During the light reaction photophosphorylation takes place producing ATP and $$NADPH_2$$ which is used as energy source for dark reaction.
Question 5
1 / -0

Chemosynthesis and photosynthesis are alike as they both

A
Are associated with heterotroph

B
Require sunlight as an energy source

C
Use method of autotrophic nutrition

D
Occur in tracheophytes

Solution

Chemosynthesis and photosynthesis are both autotrophic mode of nutrition. In autotrophic nutrition the organisms can produce food of their own. Photosynthesis is the process of carbon fixation, which mainly takes place in two steps, light reaction and dark reaction. ATP and NADPH$$_2$$ are produced in the light reaction which is utilized for carbon fixation during the dark reaction.
Chemosynthesis is the production of organic and inorganic compounds by using chemical reactions in the absence of light.
So, the correct answer is option C.
Question 6
1 / -0

Photosynthesis is a process in which

A
CO$$_{2}$$ is reduced to carbohydrate

B
NADH is reduced to NAD

C
Both A and B

D
CO$$_2$$ is oxidized to carbohydrate
Solution
Correct option: A

Explanation:
Photosynthesis is a process in which $$CO_2$$ is reduced to carbohydrate.
Six carbon dioxide molecules and six water molecules are converted into a sugar molecule and six oxygen molecules in the presence of light energy.
Carbon dioxide gets reduced to carbohydrate or glucose molecule, and water gets oxidized to water molecules.
Thus, Option A is correct.
Question 7
1 / -0

Match the column.
List I List II
1 Emerson effect a $$C_{4}$$cycle
2 Hill reaction b Photolysis
3 Calvin cycle c $$C_{3}$$cycle
4 Hatch and Slack cycle d Photosystem- I and II

A
1- a, 2- b, 3- c, 4- d

B
1- a, 2- c, 3- d, 4- b

C
1- c, 2- d, 3- a, 4- b

D
1- d, 2- b, 3- c, 4- a
Solution
1. Emerson effect - d. Photosystem- I and II
- Emerson effect is also known as the red drop effect.
- In this effect, a sharp reduction in the rate of photosynthesis is found when monochromatic light of 680 nm is used.
- It occurs mainly due to the presence of two different pigment systems, i.e., PS I and PSII.
2. Hill reaction - b. Photolysis
Hill reaction is also known as light reaction.
It is one of the phases of photosynthesis.
This phase involves two processes: photolysis of water and production of assimilatory power i.e., ATP and NADPH.

3. Calvin cycle - c. C$$_3$$ cycle
Calvin cycle is found in $$C_3$$ plants. That’s why it is also known as $$C_3$$ cycle.
In this cycle, the first $$CO_2$$ fixation product was a three-carbon organic acid. It was 3-phosphoglyceric acid (PGA).
4. Hatch and Slack cycle - a. C$$_4$$ cycle
Hatch and Slack pathway is found in $$C_4$$ plants, hence it is also known as $$C_4$$ cycle.
The primary $$CO_2$$ acceptor is a three-carbon molecule phosphoenolpyruvate (PEP) and it is present in mesophyll cells.
So, the correct answer is option D.
Question 8
1 / -0

During photosynthesis

A
Both CO$$_{2}$$ and water get oxidized

B
Both CO$$_{2}$$ and water get reduced

C
Water is reduced and CO$$_{2}$$ is oxidized

D
Carbon dioxide get reduced and water get oxidised

Solution

Photosynthesis is simply the process by which organisms convert solar energy to chemical energy. During photosynthesis, carbon dioxide is converted to glucose in the dark reaction and the absorbed water get oxidised in the light reaction and form gaseous oxygen, which gets released in air.
6 H$$_2$$0 + 6 CO$$_2$$ ----> C$$_6$$H$$_{12}$$O$$_6$$ + 6O$$_2$$
Question 9
1 / -0

Which of the following is a simplified equation of photosynthesis?

A
CO$$_{2}$$ +2 H$$_{2}$$O $$\rightarrow$$ C$$_{5}$$H$$_{10}$$O$$_{4}$$+H$$_{2}$$O+O$$_{2}$$

B
CO$$_{2}$$ + 2H$$_{2}$$O $$\rightarrow$$ (CH$$_{2}$$O)$$_{n}$$ + O$$_{2}$$

C
CO$$_{2}$$ + 2H$$_{2}$$O $$\rightarrow$$ C$$_{3}$$H$$_{6}$$O$$_{3}$$ + CO$$_{2}$$ + O$$_{2}$$

D
6CO$$_{2}$$ + 12H$$_{2}$$O $$\rightarrow$$ C$$_{6}$$H$$_{12}$$O$$_{6}$$ + 6O$$_{2}$$ + 6H$$_{2}$$O
Solution
- Photosynthesis is the process by which green plants make their own food from carbon dioxide and water in the presence of sunlight. The prepared food is glucose.
- To prepare one molecule of glucose, by the process of photosynthesis six molecules of carbon dioxide and six molecules of water are required. Six oxygen molecule are released as a byproduct.
Thus, the correct answer is '6CO$$_2$$ + 12H$$_2$$O $$\rightarrow$$ C$$_6$$H$$_{12}$$O$$_6$$ + 6O$$_2$$ + 6H$$_2$$O'.
Question 10
1 / -0

Dimorphic chloroplasts are present in

A
Sugarcane

B
Cotton

C
Pea

D
Mango
Solution
- The dimorphic chloroplast is a characteristic feature of C$$_4$$ plants.
- Among the options, sugarcane is a C$$_4$$ plant, which possesses dimorphic chloroplast.
- They have a special type of anatomy known as Kranz anatomy.
- They have two types of chloroplast-containing cells- bundle sheath cells and mesophyll cells.
- Bundle sheath cells contain chloroplast lacking grana while mesophyll cells contain chloroplast with abundant grana.
So, the correct answer is 'Sugarcane'.

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	List I		List II
1	Emerson effect	a	$$C_{4}$$cycle
2	Hill reaction	b	Photolysis
3	Calvin cycle	c	$$C_{3}$$cycle
4	Hatch and Slack cycle	d	Photosystem- I and II

Photosynthesis in Higher Plants Test - 15

Result

Photosynthesis in Higher Plants Test - 15

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SHARING IS CARING

Question 1

Gramineae only

Monocots only

Dicots only

Monocots as well as dicots

Solution

Question 2

Green,Red,Blue

Red,Blue,Green

Red,Green,Blue

Blue,Green,Red

Question 3

O$$_{2}$$

H$$_{2}$$

CO$$_{2}$$

N$$_{2}$$

Solution

Question 4

$$O_{2}$$ evolved comes from $$CO_{2}$$

ATP is formed

ATP is not formed

Water is required as medium but it does not take part in photosynthesis

Solution

Question 5

Are associated with heterotroph

Require sunlight as an energy source

Use method of autotrophic nutrition

Occur in tracheophytes

Solution

Question 6

CO$$_{2}$$ is reduced to carbohydrate

NADH is reduced to NAD

Both A and B

CO$$_2$$ is oxidized to carbohydrate

Solution

Question 7

1- a, 2- b, 3- c, 4- d

1- a, 2- c, 3- d, 4- b

1- c, 2- d, 3- a, 4- b

1- d, 2- b, 3- c, 4- a

Solution

Question 8

Both CO$$_{2}$$ and water get oxidized

Both CO$$_{2}$$ and water get reduced

Water is reduced and CO$$_{2}$$ is oxidized

Carbon dioxide get reduced and water get oxidised

Solution

Question 9

CO$$_{2}$$ +2 H$$_{2}$$O $$\rightarrow$$ C$$_{5}$$H$$_{10}$$O$$_{4}$$+H$$_{2}$$O+O$$_{2}$$

CO$$_{2}$$ + 2H$$_{2}$$O $$\rightarrow$$ (CH$$_{2}$$O)$$_{n}$$ + O$$_{2}$$

CO$$_{2}$$ + 2H$$_{2}$$O $$\rightarrow$$ C$$_{3}$$H$$_{6}$$O$$_{3}$$ + CO$$_{2}$$ + O$$_{2}$$

6CO$$_{2}$$ + 12H$$_{2}$$O $$\rightarrow$$ C$$_{6}$$H$$_{12}$$O$$_{6}$$ + 6O$$_{2}$$ + 6H$$_{2}$$O

Solution

Question 10

Sugarcane

Cotton

Pea

Mango

Solution

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