Question:

In $C_4$ plants, $C_3$ cycle takes place in

Updated On: Feb 23, 2024

Companion cells
Bundle sheath cells
Mesophyll cells
Bulliform cells

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The Correct Option is B

Solution and Explanation

Cells surrounding the vascular bundle are called the bundle sheath cells. The cells present between the upper and lower epidermis are called the mesophyll cells. In $C _{4}$ plants the fixation of carbon happens in the mesophyll cells, whereas the $C _{3}$ cycle or Calvin cycle occurs in the bundle sheath. This way, the $C _{4}$ plants are able to reduce the water loss due to transpiration. Diagrammatic representation of the $C _{4}$ cycle is shown below. The cells present in the epidermis of the monocot leaves that store water are called bulliform cells. The companion cells are specialized parenchymatous cells which are part of phloem.

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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)