Photosynthesis in Higher Plants Questions — NEET Biology

Q1

Carbon dioxide joins the photosynthetic pathway in

A PS I

B PS II

C Light reaction

D Dark reaction

Correct Answer

Option D

Solution

(d) CO2 is fixed in the dark reaction (Calvin cycle) in the stroma.

Q2

Ferredoxin is a constituent of

A PS I

B PS II

C Hill reaction

D P680

Correct Answer

Option A

Solution

(a) Ferredoxin is an electron carrier in PS I, transferring electrons to NADP+.

Q3

The process of photophosphorylation in plants involves

A reduction of CO2 in stroma

B oxidation of water

C ATP synthesis using light energy

D formation of PGAL

Correct Answer

Option C

Solution

(c) Photophosphorylation = synthesis of ATP using light energy during photosynthesis.

Q4

Which of the following is not a product of light reaction of photosynthesis?

A ATP

B NADH

C Oxygen

D NADPH

Correct Answer

Option B

Solution

(b) NADH is a product of respiration; photosynthesis produces NADPH.

Q5

A process that makes important difference between C3 and C4 plants is :

A Transpiration

B Glycolysis

C Photosynthesis

D Photorespiration

Correct Answer

Option D

Solution

(d) Photorespiration is absent in C4 plants but present in C3 plants — key difference.

Q6

Which element is located at the centre of the porphyrin ring in chlorophyll?

A Manganese

B Calcium

C Magnesium

D Potassium

Correct Answer

Option C

Solution

(c) Magnesium is the central metal atom in the chlorophyll porphyrin ring.

Q7

Which one of the following is wrong in relation to photorespiration?

A It is a characteristic of C3 plants

B It occurs in chloroplasts

C It occurs in daytime only

D It is a characteristic of C4 plants

Correct Answer

Option D

Solution

(d) Photorespiration is absent in C4 plants.

Q8

Photochemical reactions in the chloroplast are directly involved in

A Formation of phosphoglyceric acid

B Fixation of carbon dioxide

C Synthesis of glucose and starch

D Photolysis of water and phosphorylation of ADP to ATP

Correct Answer

Option D

Solution

(d) Photolysis of water and photophosphorylation (ADP→ATP) are direct photochemical reactions.

Q9

Cyclic photophosphorylation results in the formation of

A ATP and NADPH

B ATP, NADPH and O2

C ATP

D NADPH

Correct Answer

Option C

Solution

(c) Cyclic photophosphorylation produces only ATP (no NADPH, no O2 evolution).

Q10

Oxygenic photosynthesis occurs in

A Rhodobacter

B Chlorobium

C Anabaena

D Halobacterium

Correct Answer

Option C

Solution

(c) Anabaena (cyanobacteria) performs oxygenic photosynthesis like plants.