Cell Biochemistry
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Manufacturing ATP

Manufacturing NADPH2

Cyclic Phosphorylation

Non Cyclic Phosphorylation

Calvin Cycle

Photosynthesis Worksheet

Photosynthesis Experiments


Manufacturing NADH2


Krebs Cycle

Electron Transport system

Respiration Worksheet

Respiration Experiment

Kreb Cycle

In Stage 2 (Krebs Cycle) a carbon dioxide molecule is removed from the pyruvate along with H+ ions. An acetyl group (2C) remains.

This acetyl group is added to a four carbon compound present in the mitochondrion this produces Citric acid (6C). Citric acid is then broken down in a number of stages back to the original four carbon compound releasing 2 CO2 molecules, 2 ATP molecules, and numerous H+ions.

CO2 is released as a waste product and the H+ ion is added to NAD with an electron to form NADH.

The NADH releases the electron down a series of receptors called the electron carrier chain. As the electrons move down these carriers they release energy which is used to make ATP from ADP and . Finally the electrons the H+ ions and oxygen are combined to form water.