Chapter 7

Photosynthesis

The process by which plants, algae, and some bacteria convert light energy into chemical energy (sugar) using CO2 and H2O.

OXIDATION

The loss of electrons in a chemical reaction, often associated with the loss of hydrogen atoms.

REDUCTION

The gain of electrons in a chemical reaction, often associated with the gain of hydrogen atoms.

NADP+

The coenzyme of oxidation-reduction reactions that is active during photosynthesis.

When NADP+ is reduced

It gains 2 electrons.

When NADPH is oxidized

It gives up its electrons.

Light reactions

The phase of photosynthesis that occurs when sunlight is present, involving chlorophyll in the thylakoid membranes.

Calvin Cycle

Also known as dark/light-independent reactions, this is where CO2 is taken up and reduced to carbohydrates in the stroma.

Carbon Fixation

The process during the Calvin Cycle where carbon dioxide is incorporated into organic molecules.