Photosynthesis in Higher Plants Test

Result

Photosynthesis in Higher Plants Test - 48

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Photosystem has main light harvesting pigments

A
Chlorophyll a-660, chl a-670, chl a-680, chl a-690, chl a-700

B
Chlorophyll a-660, chl b, chl a-700, chl a-800 and carotenoid

C
Chlorophyll a-680, chl a-685, chl a-695 and xanthophyll

D
Chlorophyll a-700, chl a-880, chl-b, chl a-685 and phycobilins.
Solution
Photosystems contain green plastids that contain various pigments that absorb sunlight get excited or activated at a different wavelength.
Chlorophyll a between 660 nm to 800 nm.
Chlorophyll b between 680 nm.
Carotenoids have a various wavelength.
So the correct option is 'Chlorophyll a-660, chl b, chl a-700, chl a-800 and carotenoid'
Question 2
1 / -0

Chlorophyll is soluble in

A
Water

B
Organic solvents

C
Both A and B

D
None of the above

Solution

Chlorophyll a and b both are organic solvents and are soluble in alcohol, acetone etc.
So the correct option is 'Organic solvents'.
Question 3
1 / -0

Non-cyclic photophosphorylation is performed by

A
Dark reaction

B
PS I

C
PS II

D
Both B and C

Solution

Non-cyclic photophosphorylation involves both PS I and PS II and the flow of electron is unidirectional as they are not cycled back but used in the reduction of NADP into NADPH. Here water is utilized to give electrons and oxygen is evolved.
So, the correct option is 'Both B and C'.
Question 4
1 / -0

Chlorophyll consists of

A
Porphyrin head and phytol tail

B
Phosphate head and porphyrin tail

C
Phytol head and porphyrin tail

D
Porphyrin head and phosphate tail.

Solution

Chlorophyll is a bluish-green or olive-green colour pigment soluble in organic solvents like alcohol, acetone etc. It is made up of a squarish tetrapyrrolic ring or porphyrin known as head and a phytol alcohol known as the tail. It posses -$$CH_3$$ group or $$CHO$$ group which links pyrrole rings of porphyrin head to form ring system and the Mg atom is present in the central position of the tetrapyrrolic ring.
So the correct option is 'Porphyrin head and phytol tail'.
Question 5
1 / -0

Balance between $$CO_2$$ and $$O_2$$ is maintained by

A
Transpiration

B
Photosynthesis

C
Photorespiration

D
$$C_4$$ pathway.
Question 6
1 / -0

ATP formation in chloroplast and mitochondrion is explained by

A
Cholodny-Went model

B
Chemi-osmotic theory of Mitchell

C
Munch's mass flow theory

D
Relay pump theory of Godlewski

Solution

A theory postulated by the biochemist Peter Mitchell in 1961 to describe ATP synthesis by way of a proton electrochemical coupling.
it is based on the proton gradient and transfer of an electron from the mitochondrial matrix in respiration or in the stroma with the photophosphorylation of photosystems forms ATP.
So the correct option is 'Chemi-osmotic theory of Mitchell'.
Question 7
1 / -0

Chlorophyll a has

A
$$-CHO$$ group

B
$$-COOH$$ group

C
$$-CH_3$$ group

D
No functional group
Solution
Correct Option: C
Explanation:
- 'Chlorophyll a' is used in oxygenic photosynthesis.
- The difference in chlorophyll a and b is that chlorophyll a has a methyl group whereas chlorophyll b has an aldehyde group.
- Its molecular formula is C₅₅H₇₂MgN₄O_5.
Hence, chlorophyll a has −CH₃ group.
Question 8
1 / -0

Photolithotrophs (photoautotrophs) obtain energy from

A
Radiations and carbon from inorganic compounds

B
Radiations and carbon from organic compounds

C
Organic compounds

D
Inorganic compounds

Solution

Photoautotrophs are organisms that carry out photosynthesis. Using energy from sunlight, carbon dioxide and water are converted into organic materials to be used in cellular functions such as biosynthesis and respiration.

So, the correct option is 'Radiations and carbon from inorganic compounds'.
Question 9
1 / -0

Non-cyclic photophosphorylation involves

A
PS I only

B
PS II only

C
Stroma matrix

D
Both A and B

Solution

Non-cyclic photophosphorylation produces ATP using the energy from excited electrons provided by photosystem II. As electrons pass through the non-cyclic pathway, they do not return to the original photosystem. This does not create a cycle, hence the name non-cyclic.

1. Photolysis provides H+ ions to replace those lost in the photosystems. The excited electrons provide energy for a proton pump to actively transport additional H+ into the thylakoid. The high concentration of H+ diffuse past ATP synthase as they pass out of the membrane to the lower H+ concentration. The energy created as H+ passes the ATP synthase forms ATP. Diffusion of H+ ions from high to low concentration through ATP synthase to form ATP is called chemiosmosis.

2. The electrons provided by non-cyclic photophosphorylation are boosted a 2nd time to a higher energy level by photosystem I to then create 2 NADPH.

So, the correct option is 'Both A and B'.
Question 10
1 / -0

Protochlorophyll differs from chlorophyll in lacking

A
4 hydrogen atoms in two pyrrole rings

B
2 hydrogen atoms in one of its pyrrole rings

C
2 hydrogen atoms in two pyrrole rings

D
1 hydrogen atom in one pyrrole ring

Solution

Photochlorophyll lacks two hydrogens at the 7 and 8 positions at the porphyrin part of the pyrrole ring. It is an oxidation product of chlorophyll a. In presence of light, it is reduced and esterified with phytol group to produce chlorophyll in presence of enzyme chlorophyllase.
So the correct option is '2 hydrogen atoms in one of its pyrrole rings'.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Photosynthesis in Higher Plants Test - 48

Result

Photosynthesis in Higher Plants Test - 48

Score

-

Rank

-

SHARING IS CARING

Question 1

Chlorophyll a-660, chl a-670, chl a-680, chl a-690, chl a-700

Chlorophyll a-660, chl b, chl a-700, chl a-800 and carotenoid

Chlorophyll a-680, chl a-685, chl a-695 and xanthophyll

Chlorophyll a-700, chl a-880, chl-b, chl a-685 and phycobilins.

Solution

Question 2

Water

Organic solvents

Both A and B

None of the above

Solution

Question 3

Dark reaction

PS I

PS II

Both B and C

Solution

Question 4

Porphyrin head and phytol tail

Phosphate head and porphyrin tail

Phytol head and porphyrin tail

Porphyrin head and phosphate tail.

Solution

Question 5

Transpiration

Photosynthesis

Photorespiration

$$C_4$$ pathway.

Question 6

Cholodny-Went model

Chemi-osmotic theory of Mitchell

Munch's mass flow theory

Relay pump theory of Godlewski

Solution

Question 7

$$-CHO$$ group

$$-COOH$$ group

$$-CH_3$$ group

No functional group

Solution

Question 8

Radiations and carbon from inorganic compounds

Radiations and carbon from organic compounds

Organic compounds

Inorganic compounds

Solution

Question 9

PS I only

PS II only

Stroma matrix

Both A and B

Solution

Question 10

4 hydrogen atoms in two pyrrole rings

2 hydrogen atoms in one of its pyrrole rings

2 hydrogen atoms in two pyrrole rings

1 hydrogen atom in one pyrrole ring

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.