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MODEL PAPER 10 — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYMODEL PAPER 105 Marks
Question
Given below is a diagram showing ATP synthesis during aerobic respiration, replace the symbols A, B, C, D and E by appropriate terms given in the box.

Image
F1, Particle, Pi, 2H+, Inner mitochondrial membrane, ATP, Fo particle, ADP
✓

Answer

The energy released during the electron transport system is utilized in synthesizing ATP with the help of ATP synthase (complex V). This complex consists of two major components, F1 and F0. The F1 headpiece is a peripheral membrane protein complex and contains the site for synthesis of ATP from ADP and inorganic phosphate. FO is an integral membrane protein complex that forms the channel through which protons across the inner membrane. The passage of protons through the channel is coupled to the catalytic site of the F1 component for the production of ATP. For each ATP produced, $2 H ^{+}$ passes through F0 from the intermembrane space to the matrix down the electrochemical proton gradient.

Image

Diagrammatic presentation of ATP
synthesis in mitochondria

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