Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEETBotanyPhotosynthesis in Higher Plants

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): During the light reaction, the primary electron acceptor located towards the outer side of the thylakoid membrane transfers its electron directly to an electron carrier. Reason (R): The transfer of electrons through an H-carrier is essential to remove a proton from the stroma and release it into th

Options

  1. ABoth (A) and (R) are true and (R) is the correct explanation of (A)
  2. BBoth (A) and (R) are true but (R) is not the correct explanation of (A)
  3. C(A) is true but (R) is false
  4. D(A) is false but (R) is true

Correct answer

D. (A) is false but (R) is true

Step-by-step solution

According to the chemiosmotic hypothesis, the primary acceptor of electrons is located towards the outer side of the thylakoid membrane. It transfers its electron not to an electron carrier, but to an H-carrier (plastoquinone). Therefore, Assertion (A) is false. This H-carrier removes a proton from the stroma while transporting an electron. When it passes the electron to the electron carrier on the inner side of the membrane, the proton is released into the lumen. This mechanism is crucial for developing the proton

Practice Photosynthesis in Higher Plants on Quantrex Academy →

More from Photosynthesis in Higher Plants

How many turns of Calvin cycle are required for the formation of three molecules of glucose ? 2026Photorespiration reaction catalyzed by RuBisCo is shown below : RuBP +O₂ 3-Phosphoglycerate + X Identify “X” from the given options : 2026Which of the following statements regarding photorespiration are correct ? (a) Do not occur in C3 plants (b) CO₂ is consumed and O₂ is generated (c) Phosphoglycolate is formed (d) 2026Which pigment has absorption peak at 700 nm in the photosynthetic reaction centre PS I (P700) ? 2026How many ATP and NADPH molecules are required to make one molecule of glucose through the Calvin pathway ? 2026Find the incorrect statement(s) about photosynthesis from the following : A. The water splitting complex is associated with PS I. B. C ₄ plants use the C ₃ pathway of CO ₂ fixation 2026The enzyme required for carboxylation in the Calvin cycle is : 2026Select the correct sequence of experiments that led to a gradual understanding of photosynthesis in green plants. 2026 Full Photosynthesis in Higher Plants list All NEET PYQs