Which option is correct about a chlorophyll molecule?

A. Methyl group on second pyrrole ring

B. Aldehyde group on second pyrrole ring

C. Methyl group on fourth pyrrole ring

D. Aldehyde group on fourth pyrrole ring

Everyday Science · Botany (Plant Biology) · page 17 of 19

Photosynthesis & Plant MCQs with Answers

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Photosynthesis & Plant Nutrition MCQs (161–170)

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Past paper MCQs in this chapter · See all past papers

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161.
Which type of chlorophyll is found in all types of algae?
Correct Answer: D. Chlorophyll a
One-liner
Chlorophyll a is the primary photosynthetic pigment found universally in all types of algae, as well as in all higher plants and cyanobacteria.
162.
Which option is correct about a chlorophyll molecule?
Correct Answer: A. Methyl group on second pyrrole ring
One-liner
A chlorophyll molecule has a methyl group on the second pyrrole ring.
163.
Nitrogen fixation by bacteria in the root nodules is an example of _?
Correct Answer: C. Mutualism
One-liner
Nitrogen fixation by bacteria in root nodules is an example of mutualism, where both the bacteria and the host plant benefit from the relationship.
164.
What type of process is photosynthesis?
Correct Answer: D. Endothermic
One-liner
Photosynthesis is an endothermic process because it absorbs energy in the form of sunlight to convert carbon dioxide and water into glucose and oxygen.
165.
During the daytime for the photosynthesis, plants require ?
Correct Answer: B. Carbon dioxide
One-liner
During the daytime, plants require carbon dioxide (CO₂) for photosynthesis.
166.
Synthesis of ATP in the chlorophyll by utilizing light energy is called _?
Correct Answer: A. Photophosphorylation
One-liner
The synthesis of ATP in chlorophyll using light energy is called Photophosphorylation.
167.
Which of the following factors does NOT affect the process of photosynthesis?
Correct Answer: C. Oxygen
One-liner
Oxygen does not affect the process of photosynthesis; rather, it is a by-product released during the process.
168.
Past Paper MCQ
How much carbon dioxide can a tree remove annually from the air?
Correct Answer: A. 48 pounds
One-liner
A single mature tree can remove approximately 48 pounds of carbon dioxide from the air annually.
169.
The yellowing of leaves due to lack of chlorophyll is called ?
Correct Answer: D. Chlorosis
One-liner
The yellowing of leaves due to lack of chlorophyll is called Chlorosis.
170.
Splitting of water in presence of light is called?
Correct Answer: A. Photolysis
One-liner
The splitting of water molecules in the presence of light is called Photolysis.

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Photosynthesis & Plant MCQs with Answers

Photosynthesis & Plant Nutrition MCQs (161–170)

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