Page 302 - ABCTE Study Guide_Neat

Photosynthesis

Plant cells also use aerobic respiration to produce ATP. Unlike animals, plants can utilize energy from the
sun to drive photosynthesis and produce ATP as well as glucose molecules, which are then used in
respiration to drive cell processes. It is by this pathway that energy from the sun is made available to living
organisms.

The overall process of photosynthesis is summarized by the equation:

12H 2O + 6CO 2 6O 2 + C6H 12O 2 + 6H 2O

Thus for every six molecules of CO 2 and twelve of H 2O taken in by the plant, a molecule of glucose can
be produced. This process removes carbon dioxide (CO 2) from the air, releases oxygen, and is what has
made almost all forms of life besides very simple single-celled organisms possible. There are two major
sets of reactions in photosynthesis: light dependent and light independent.

Light-trapping pigments such as chlorophyll exist in the chloroplasts. Light energy is used to release
electrons from the chlorophyll molecule. These electrons will pass through at least one electron transport
chain (passed from molecule to molecule).

Question

Aerobic respiration occurs mainly in

A animal cells.

B plant cells.

C photosynthetic bacteria.

D all of the above.