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Question

33. Match the parts given in column I with the events given in column II and choose the correct combination from the options given below.

Column-I Column-II
A. Grana of chloroplast I. Kreb's cycle
B. Stroma of chloroplast II. Light reaction
C. Cytoplasm III. Dark reaction
D. Mitochondrial matrix IV. Glycolysis

A
A – II; B – III; C – IV; D – I
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B
A – IV; B – I; C – III; D – II
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C
A – IV; B – III; C – II; D – I
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D
A – I; B – II; C – IV; D – III
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Solution

The correct option is A A – II; B – III; C – IV; D – I
A: Light reaction occurs in the grana of the chloroplast. It is the first stage of photosynthesis in which plants capture and store energy from sunlight. In this process, light energy is converted into chemical energy, in the form of the energy-carrying molecules ATP and NADPH.

B: Dark reaction is a thermochemical reaction, which takes place in the stroma of the chloroplast. It is not a light driven reaction but are dependent on the products of light reactions (ATP and NADPH).

C: Glycolysis takes place in the cytoplasm. It is a metabolic process in which glucose is converted in a series of steps to pyruvic acid and during which energy is released in the form of ATP.

D: Krebs cycle is the sequence of reactions by which cells generate energy during the process of aerobic respiration. It takes place in the mitochondria (matrix). This process uses up oxygen and produces carbon dioxide and water as waste products while ADP is converted to energy-rich ATP.

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