Question

All of the following statements are true about chloroplasts EXCEPT:

A. chloroplasts are found in the leaves of most plants
B. the light reaction usually occurs outside of the chloroplasts
C. the calvin cycle occurs in the stroma
D. grana ar stacks of thylakoids

Answer 1

The incorrect statement is that the light reaction usually occurs outside of the chloroplasts, as light reactions actually take place within the thylakoid membranes of the chloroplasts.

Step-by-step explanation:

The only statement about chloroplasts that is not true is: B. the light reaction usually occurs outside of the chloroplasts. This statement is false because the light reactions of photosynthesis actually occur within the thylakoid membranes of the chloroplasts. A chloroplast contains neat stacks called grana, which are made up of thylakoids. The thylakoid membranes house photosystems and chlorophyll, which are essential for the light reactions. Furthermore, the Calvin cycle takes place in the stroma, which is the fluid-filled space surrounding the grana.