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A2 Biology (AQA) ­ Unit 4…read more

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1.) Glycolysis happens in the cytoplasm of cells. It is
the "splitting" of glucose into two pyruvate
2.) Activation occurs, glucose is phosphorylated and
inorganic phosphate (Pi) is added.
3.) This occurs twice, so two molecules of Pi are
added to the glucose. Each time, ATP is used, and
ADP is produced.
4.) Splitting then occurs. The glucose splits into two
triosephosphate molecules.
5.) Oxidation occurs and NADH is formed.
6.) Reorganisation occurs with the 3 leftover carbon
molecules. Energy is released from this, forming
ATP from ADP and pyruvate is made.…read more

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1.) Pyruvate made from glycolysis is used in the
link reaction, which takes place in the matrix.
2.) A carbon molecule is removed from pyruvate
to produce acetate.
3.) The removed carbon molecule combines with
oxygen to produce carbon dioxide.
4.) Co-enzyme A attaches to the acetate to form
acetate co-enzyme A.…read more

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1.) The acetate co-enzyme A from the link
reaction is used here, this also occurs in the
2.) Co-enzyme A releases acetate and the acetate
attaches to a 4 carbon molecule.
3.) 2 carbon molecules are removed from the
4.) Oxygen combines with these removed
carbons to form 2 carbon dioxide molecules.
5.) The remaining 4 carbon molecule is
reorganised to produce ATP and this can be…read more

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