Photosynthesis Question 95

95. Carbon dioxide joins the photosynthetic pathway in

[1988]

(a) PS I

(b) PS II

(c) Light reaction

(d) Dark reaction

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Answer : d

Hints & Solution

(d) Photosynthesis is completed in two phases-light and dark phases. In dark phase (Blackman’s reaction or biosynthetic phase) carbohydrates are synthesised from carbon dioxide in stroma of chloroplast using ATP and NADPH products of light reactions.