A) EMP pathway
B) TCA cycle
C) Hatch and Slack cycle
D) Calvin cycle
Correct Answer: C
Solution :
Hatch and Slack pathway (\[{{C}_{4}}\]pathway, dicarboxylic acid pathway) occurs in tropical plants (maize, sugarcane, Atriplex) having Kranz anatomy (concentric differencial mesophyll around vascular bundles with chloroplast containing bundle sheath.) \[{{C}_{4}}\]plants are more efficient in picking up \[C{{O}_{2}}\]and tolerating drought condition. They are called \[{{C}_{4}}\] plants as the first product of \[C{{O}_{2}}\]fixation is a 4 carbon compound oxalo acetic acid. TCA cycle (Krebs cycle or tricarboxylic acid cycle or citric acid cycle) operates in the matrix of mitochondria. In EMP pathway (glycolysis), a molecule of glucose is broken down to two molecules of pyruvic acid. Calvin cycle (\[{{C}_{3}}\]cycle or reductive pentose pathway or photosynthetic carbon reduction) is the metabolic pathway of the light- independent stage of photosynthesis, which occurs in stroma of chloroplast. It involves the fixation of \[C{{O}_{2}}\] and its subsequent reduction to carbohydrate.
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