Photosynthesis in Higher Plants Test

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Photosynthesis in Higher Plants Test - 39

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Weekly Quiz Competition

Question 1
1 / -0

Site of ATP synthesis in the cell is _______.

A
Outer mitochondrial membrane

B
Mitochondrial matrix

C
Cristae

D
None of the above
Question 2
1 / -0

During what stage of photosynthesis are NADP$$^+$$ and ADP$$^+$$ Pi converted to ATP and NADPH?

A
The ligh dependent reactions

B
The light independent reactions

C
Both (A) and (B)

D
None of the above

Solution

During the light phase of photosynthesis, ATP and NADPH are synthesised from ADP and NADP which become the assimilatory power for dark phase reactions to fix and reduce carbon dioxide.
Question 3
1 / -0

Photosynthesis generally takes place in which portions of the plant?

A
Leaf and other chloroplast bearing parts

B
Stem and leaf

C
Roots and chloroplast bearing parts

D
Bark and leaf

Solution

Photosynthesis generally takes place in leaf and other chloroplast bearing parts. Chloroplasts contain a green substance called as chlorophyll. It is, the primary pigment used in photosynthesis, reflects green light and absorbs red and blue light most strongly. In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll.
So, the correct answer is option A.
Question 4
1 / -0

Nitrogen is a part of which vital substance in plant cell?

A
Cellulose

B
Nectar

C
Glucose

D
Chlorophyll

Solution

Cellulose, nectar and glucose are made up of elements carbon, hydrogen and oxygen. Nitrogen is present in chlorophyll .
Question 5
1 / -0

Non-green leaves also have chlorophyll. They contain a large amount of ______.

A
Anthocyanins

B
Carotenoids

C
Other pigments

D
All of the above

Solution

The leaves of the ornamental plants are colourful. They have the green chlorophyll pigments along with the other pigments. There are red and brown coloured pigments which comprise of the flavonoids and carotenoids. The other pigments like the betalains and other type of chlorophyll pigments mask the green colour of the leaf.
Thus, the correct answer is option D.
Question 6
1 / -0

In $${C_4}$$ plants, the first carbon dioxide acceptor is ..........

A
Pyruvate

B
Phosphoenol pyruvate

C
Ribulose Bisphosphate

D
Ribulose 5 - phosphate

Solution

C$$_4$$ cycle also known as Hatch and Slack cycle operates in C$$_4$$ plants wherein the primary CO$$_2$$ acceptor is 3C compound, Phosphoenolpyruvate (PEP) and first stable product formed is a 4-carbon compound, oxalo acetic acid (OAA). Hence, option B is correct.
Question 7
1 / -0

In the process of photosynthesis, light energy is converted to

A
Kinetic energy.

B
Potential energy.

C
Chemical energy.

D
Respiratory energy.

Solution

In photosynthesis, light energy is converted into chemical energy. Carbon dioxide is fixed into glucose by trapping of light by the photosynthetic pigments in the in the chloroplast. The chemical energy exists mainly in form of ATP which is used by the plant for general metabolic reaction.
So, the correct answer is option C.
Question 8
1 / -0

The family with many $$C_4$$ plants is

A
Malvaceae

B
Solanaceae

C
Cruciferae

D
Gramineae

Solution

$$C_4$$ plants are those which photosynthesize following the mechanism called $$C_4$$ photosynthesis. They are found only in the angiosperms with about 8,000 members in 17 families ( equivalent to about 3% of all land plants. Combined, the grasses (family Poaceae or Gramineae) and sedges (family Cyperaceae) comprise roughly 79% of the total number of $$C_4$$ species with Gramineae family comprises highest number of $$C_4$$ plants. Examples of $$C_4$$ species are the economically important crops corn or maize (Zea mays), sugarcane (Saccharum officinarum), sorghum (Sorghum bicolor), and millets. Hence option D is correct.
Question 9
1 / -0

Which statement is correct regarding biosynthetic phase?

A
It needs energy produced during the light phase.

B
It does not need light directly.

C
It works in both light and dark conditions.

D
All of the above
Solution
- Biosynthetic phase is also known as the dark phase of photosynthesis which does not require light to happen.
- It requires ATP and NADPH$${_2}$$ to fix carbon dioxide that is produced during the light phase of photosynthesis.
- It takes place in the dark as well as light.
So, the correct answer is option D.
Question 10
1 / -0

Who described $$C_4$$ pathway for first time?

A
Hatch and Slack

B
Robert Hill

C
Hans Krebs

D
Melvin Calvin

Solution

The Hatch and Slack cycle is called as C$$_4$$ cycle. Kortschak et al. 1965 by using C-14 labelled carbon dioxide observed that dicarboxylic acids, like malic acids and aspartic acids were found in the leaves of sugarcane. Later Hatch and Slack, 1966, discovered an alternate pathway of carbon dioxide fixation. In this scheme the carbon dioxide acceptor is phosphoenol pyruvate or PEP and the first product is oxaloacetic acid OAA. Besides sugarcane several $$C_4$$ plants have been identified, sine then example Zea, Panicum, Sorghum, Atriplex, Amaranthus etc.
So, the correct answer is 'Hatch and Slack'

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Photosynthesis in Higher Plants Test - 39

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Photosynthesis in Higher Plants Test - 39

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SHARING IS CARING

Question 1

Outer mitochondrial membrane

Mitochondrial matrix

Cristae

None of the above

Question 2

The ligh dependent reactions

The light independent reactions

Both (A) and (B)

None of the above

Solution

Question 3

Leaf and other chloroplast bearing parts

Stem and leaf

Roots and chloroplast bearing parts

Bark and leaf

Solution

Question 4

Cellulose

Nectar

Glucose

Chlorophyll

Solution

Question 5

Anthocyanins

Carotenoids

Other pigments

All of the above

Solution

Question 6

Pyruvate

Phosphoenol pyruvate

Ribulose Bisphosphate

Ribulose 5 - phosphate

Solution

Question 7

Kinetic energy.

Potential energy.

Chemical energy.

Respiratory energy.

Solution

Question 8

Malvaceae

Solanaceae

Cruciferae

Gramineae

Solution

Question 9

It needs energy produced during the light phase.

It does not need light directly.

It works in both light and dark conditions.

All of the above

Solution

Question 10

Hatch and Slack

Robert Hill

Hans Krebs

Melvin Calvin

Solution

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