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  4. Dark reaction in photosynthesis is called so because

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Q. Dark reaction in photosynthesis is called so because

Photosynthesis in Higher Plants

Solution:

Biosynthetic phase (dark or Blackman's reaction) catalyses assimilation of $CO_{2}$ to carbohydrates. The reactions are called carbon reactions.They occur in stroma of chloroplasts. The reactions do not require light. Instead assimilatory power ($ATP$ and $NADPH$) produced during photochemical phase is used in fixation and reduction of carbon dioxide. All the enzymes required for the process are present in the matrix or stroma of the chloroplast.