Question:
Which of the following is a C$_4$ plant?
Which of the following is a C$_4$ plant?
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C$_4$ crops: Maize, sorghum, sugarcane; thrive in hot, sunny climates.
Updated On: Jul 2, 2026
- Wheat
- Rice
- Maize
- Barley
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The Correct Option is C
Approach Solution - 1
C$_4$ plants, like maize, possess a specialized mechanism that concentrates CO$_2$ at the site of the Calvin cycle, enhancing photosynthetic efficiency under high light and temperature conditions. This adaptation makes them more efficient in water and nitrogen use compared to C$_3$ plants like wheat, rice, and barley.
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Approach Solution -2
Mechanism Recall: C$_4$ plants have a specific biochemical trick — an extra CO$_2$-concentrating step before the Calvin cycle — that C$_3$ plants lack.
Maize is the textbook C$_4$ crop, using this mechanism to photosynthesize efficiently even in high heat and light.
Wheat, rice, and barley are all classic C$_3$ plants — they run the Calvin cycle directly without the extra CO$_2$-concentrating step, making them less efficient under hot, dry conditions.
Maize is the textbook C$_4$ crop, using this mechanism to photosynthesize efficiently even in high heat and light.
Wheat, rice, and barley are all classic C$_3$ plants — they run the Calvin cycle directly without the extra CO$_2$-concentrating step, making them less efficient under hot, dry conditions.
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