A) \[{{C}_{4}}-\] plants
B) \[{{C}_{3}}-\]plants
C) \[{{C}_{2}}-\]plants
D) \[{{C}_{1}}\] plants
Correct Answer: A
Solution :
The plants in which first stable product for the initial \[C{{O}_{2}}\] fixation in dark reaction, is malic acid are known as \[{{C}_{4}}-\]plants. During night time, carbon dioxide combines with phosphoenol pyruvic acid (PEPA) to form oxaloacetic acid in mesophyll chloroplasts which converts to malic acid.
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