How many ATP and NADPH, are required for the synthesis of one molecule of Glucose during Calvin cycle?

NEET-2023 [Photosynthesis-in-Higher-Plants] [class-xi ]

• 18 ATP and 16 NADPH₂
• 12 ATP and 12 NADPH₂
• 18 ATP and 12 NADPH₂
• 12 ATP and 16 NADPH₂
Correct Option: C  [ 18 ATP and 12 NADPH₂ ]

Remark:

The reaction centre in PS II has an absorption maxima at:

NEET-2023 [Photosynthesis-in-Higher-Plants] [class-xi ]

• 780 nm
• 680 nm
• 700 nm
• 660 nm
Correct Option: B  [ 680 nm ]

Remark:

Which of the following combinations is required for chemiosmosis?

NEET-2023 [Photosynthesis-in-Higher-Plants] [class-xi ]

• proton pump, electron gradient, NADP synthase
• membrane, proton pump, proton gradient. ATP synthase
• membrane, proton pump, proton gradient, NADP synthase
• proton pump, electron gradient, ATP synthase
Correct Option: B  [ membrane, proton pump, proton gradient. ATP synthase ]

Remark:

Given below are two statements:
Statement I: The primary CO₂ acceptor in C₄ plants is phosphoenolpyruvate and is found in the mesophyll cells.
Statement II: Mesophyll cells of C₄ plants lack RuBisCo enzyme.
In the light of the above statements, choose the correct answer from the options given below:

NEET-2022 [Photosynthesis-in-Higher-Plants] [class-xi ]

• Both Statement I and Statement II are correct
• Both Statement I and Statement II are incorrect
• Statement I is correct but Statement II is incorrect
• Statement I is incorrect but Statement II is correct
Correct Option: A  [ Both Statement I and Statement II are correct ]

Remark:

Which one of the following is not true regarding the release of energy during ATP synthesis through chemiosmosis? It involves:

NEET-2022 [Photosynthesis-in-Higher-Plants] [class-xi ]

• Breakdown of proton gradient
• Breakdown of electron gradient
• Movement of protons across the membrane to the stroma
• Reduction of NADP to NADPH₂ on the stroma side of the membrane
Correct Option: B  [ Breakdown of electron gradient ]

Remark:

While explaining interspecific interaction of population, (+) sign is assigned for beneficial interaction, (–) sign is assigned for detrimental interaction and (0) for neutral interaction. Which of the following interactions can be assigned (+) for one specifies and (–) for another specifies involved in the interaction?

NEET-2022 [Photosynthesis-in-Higher-Plants] [class-xi ]

• Predation
• Amensalim
• Commensalism
• Competition
Correct Option: A  [ Predation ]

Remark:

The first stable product of CO₂ fixation in sorghum is:

NEET-2021 [Photosynthesis-in-Higher-Plants] [class-xi ]

• Pyruvic acid
• Oxaloacetic acid
• Succinic acid
• Phosphoglyceric acid
Correct Option: B  [ Oxaloacetic acid ]

Remark:

Which of the following statements is incorrect?

NEET-2021 [Photosynthesis-in-Higher-Plants] [class-xi ]

• Both ATP and NADPH + H⁺ are synthesized during non-cyclic photophosphorylation.
• Stroma lamellae have PS I only and lack NADP reductase.
• Grana lamellae have both PS I and PS II.
• Cyclic photophosphorylation involves both PS I and PS II.
Correct Option: D  [ Cyclic photophosphorylation involves both PS I and PS II. ]

Remark:

In light reaction, plastoquinone facilitates the transfer of electrons from:

NEET-(Sept)2020 [Photosynthesis-in-Higher-Plants] [class-xi ]

• PS-II to Cytb₆f complex
• Cytb₆f complex to PS-I
• PS-I to NADP⁺
• PS-I to ATP synthase
Correct Option: A  [ PS-II to Cytb₆f complex ]

Remark:

The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of:

NEET-(Sept)2020 [Photosynthesis-in-Higher-Plants] [class-xi ]

• 2 molecules of 3-C compound
• 1 molecule of 3-C compound
• 1 molecule of 6-C compound
• 1 molecule of 4-C compound and 1 molecule of 2-C compound
Correct Option: B  [ 1 molecule of 3-C compound ]

Remark: