Which of the following pairs is incorrect?

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(A) $1$. $C_3$ plants are those that fix $CO_2$ into a $3$-carbon compound $(PGA)$. Maize is a $C_4$ plant,not a $C_3$ plant. Thus,the pair '$C_3$ - M

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$C_3$ - Maize

Vedclass · Answer

(A) $1$. $C_3$ plants are those that fix $CO_2$ into a $3$-carbon compound $(PGA)$. Maize is a $C_4$ plant,not a $C_3$ plant. Thus,the pair '$C_3$ - Maize' is incorrect.$2$. $C_4$ plants exhibit Kranz anatomy,which is a correct association.$3$. The Calvin cycle involves the formation of $3$-phosphoglyceric acid $(PGA)$ as the first stable product,which is correct.$4$. The Hatch and Slack pathway is another name for the $C_4$ cycle. However,the pathway involves oxaloacetic acid $(OAA)$ as the first stable product,not acetic acid. Therefore,both options $A$ and $D$ contain incorrect information. Given the standard context of such questions,$C_3$ - Maize is a classic example of a mismatch.

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