Question

A mutation occurs in the chloroplasts of a lettuce plant, causing its thylakoid membranes to become more permeable to charged ions. How might this mutation affect the Calvin cycle?

Answer 1

Explanation:

The Calvin cycle (also known as the Calvin-Benson cycle or the carbon fixation cycle of photosynthesis) consists of a series of biochemical processes that are carried out in the stroma of the chloroplasts of photosynthetic organisms.

The reactions of the Calvin cycle belong to the so-called independent phase of light, which is responsible for fixing the CO2, incorporating it into the organic matter of the individual in the form of glucose by means of the RuBisCo enzyme. It should be noted that this set of reactions is mistakenly called the dark phase, since many of the enzymes in the process, including RuBisCo, depend on the activation of the ferredoxin-thioredoxin system, which is only found in its active form (the reduced one) in the presence of the light.