Question:

Which one is a C4-plant?

Updated On: Aug 20, 2024

papaya
pea
potato
maize/corn

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The Correct Option is D

Solution and Explanation

For a long time, Calvin cycle (C3 cycle) was considered to be the only photosynthetic pathway for reduction of CO2, into carbohydrates. M.D. Hatch and Slack reported that a 4-C compound oxaloacetic acid (OAA) is the first stable product in CO2, reduction process. This led to an alternative pathway of CO2, fixation which is known as Hatch and Slack's cycle or C4 cycle. It occurs in sugarcane, maize etc. These C4 plants have a characteristic leaf anatomy called Kranz anatomy.

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List I	List II
A	Mesozoic Era	I	Lower invertebrates
B	Proterozoic Era	II	Fish & Amphibia
C	Cenozoic Era	III	Birds & Reptiles
D	Paleozoic Era	IV	Mammals

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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)