Question:

$C_4$ plants are more efficient in photosynthesis than $C_3$ plants due to

Updated On: Jul 19, 2024

higher leaf area
presence of larger number of chloroplasts in the leaf cells
presence of thin cuticle
lower rate of photorespiration.

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The Correct Option is D

Approach Solution - 1

Plants that utilize the Calvin cycle during the dark phase of photosynthesis are referred to as C₃ plants, while those employing the Hatch-Slack pathway during this phase are known as C₄ plants. C₄ plants have evolved a specialized anatomical structure in their leaves called Kranz anatomy, which aids in reducing or preventing photorespiration. In contrast, C₃ plants lack such anatomical adaptations in their leaves, leading to a higher rate of photorespiration, thus decreasing their photosynthetic efficiency.

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$C_4$ plants are more efficient than $C_3$ due to their high rate of photosynthesis and reduced rate of photorespiration.

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Concepts Used:

Photosynthesis in Higher Plants

Processes Of Photosynthesis in Higher Plants:

Photosynthesis in higher plants involves the following processes:

Light Reaction
Dark Reaction

Light Reaction:

This phenomenon occurs in the presence of light.
The pigment absorbs light and produces energy in the form of ATP.
The process involves- absorption of light, water splitting, the release of oxygen, and formation of ATP and NADPH.

Dark Reaction:

This process occurs in the absence of light in the stroma of the chloroplasts. The following cycles are involved in the process:

Calvin Cycle (C3 Cycle)
C4 Cycle (Hatch and Slack Pathway)