Questions on the chemiosmotic theory explaining ATP synthesis in photosynthesis and the environmental and internal factors that regulate photosynthetic efficiency.
Protons move through ATP synthase from the lumen to the stroma, generating ATP through chemiosmosis.
Ref: NCERT Class 11 Biology Chapter 11: Photosynthesis in Higher Plants Chemiosmotic Hypothesis and Factors Affecting Photosynthesis
NADP+ accepts electrons and hydrogen to form NADPH in the light-dependent reactions.
Ref: NCERT Class 11 Biology Chapter 11: Photosynthesis in Higher Plants Chemiosmotic Hypothesis and Factors Affecting Photosynthesis
The cytochrome b6f complex pumps protons across the thylakoid membrane, creating a proton gradient for ATP synthesis.
Ref: NCERT Class 11 Biology Chapter 11: Photosynthesis in Higher Plants Chemiosmotic Hypothesis and Factors Affecting Photosynthesis
Oxygen concentration does not directly affect the rate of photosynthesis, though high levels can increase photorespiration in C₃ plants.
Ref: NCERT Class 11 Biology Chapter 11: Photosynthesis in Higher Plants Chemiosmotic Hypothesis and Factors Affecting Photosynthesis
Glucose formation does not occur during the light reactions; it occurs in the Calvin cycle.
Ref: NCERT Class 11 Biology Chapter 11: Photosynthesis in Higher Plants Chemiosmotic Hypothesis and Factors Affecting Photosynthesis
Photorespiration occurs in C₃ plants when O₂ concentration is high and CO₂ concentration is low, leading RuBisCO to function as an oxygenase instead of a carboxylase.
Ref: NCERT Class 11 Biology Chapter 11: Photosynthesis in Higher Plants Chemiosmotic Hypothesis and Factors Affecting Photosynthesis
Photorespiration occurs when RuBisCO binds oxygen to RuBP, leading to energy loss.
Ref: NCERT Class 11 Biology Chapter 11: Photosynthesis in Higher Plants Chemiosmotic Hypothesis and Factors Affecting Photosynthesis
The Calvin cycle takes place in the stroma of the chloroplast, where carbon fixation occurs.
Ref: NCERT Class 11 Biology Chapter 11: Photosynthesis in Higher Plants Chemiosmotic Hypothesis and Factors Affecting Photosynthesis
Oxygen is released during the light-dependent reactions, not the light-independent reactions.
Ref: NCERT Class 11 Biology Chapter 11: Photosynthesis in Higher Plants Chemiosmotic Hypothesis and Factors Affecting Photosynthesis
During the reduction phase of the Calvin cycle, ATP provides energy, and NADPH provides electrons to convert PGA into G3P.
Ref: NCERT Class 11 Biology Chapter 11: Photosynthesis in Higher Plants Chemiosmotic Hypothesis and Factors Affecting Photosynthesis
Photosystem II is responsible for the photolysis of water, which releases oxygen, protons, and electrons.
Ref: NCERT Class 11 Biology Chapter 11: Photosynthesis in Higher Plants Chemiosmotic Hypothesis and Factors Affecting Photosynthesis
The proton gradient drives ATP synthesis via ATP synthase in the thylakoid membrane.
Ref: NCERT Class 11 Biology Chapter 11: Photosynthesis in Higher Plants Chemiosmotic Hypothesis and Factors Affecting Photosynthesis
