Question

In C 4 photosynthesis, carbon fixation takes place in the ____ cells, and then is transferred as malic or aspartic acid to ____ cells, where carbon dioxide is released for entry into the Calvin cycle.

Answer 1

Carbon fixation occurs in mesophyll cells and then transferred as malate to the bundle-sheath cells, where carbon dioxide is released.

Step-by-step explanation:

The Hatch–Slack pathway or the C₄ carbon fixation, is a type of photosynthetic process in some of the plants. C₄ carbon fixation refers to the production of four carbon molecule, first product of carbon fixation.

The process of carbon fixation initially occurs in the mesophyll cells, to form a simple four carbon organic molecule, oxaloacetate. The oxaloacetate is further converted to malate so that it can be transported to bundle-sheath cells.

In bundle sheath cells, break down of malate results in the release of carbon dioxide for entry into the Calvin cycle.