In more complicated systems, the primary plots may be linear but the secondary plots non-linear. For example, if not one but two molecules of inhibitor can bind to the substrate binding site, then parabolic competitive inhibition is said to occur, because of the shape of the secondary and Dixon plots.

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#XL - Q Biochemistry

Two types of plant peroxisomes:

Present in leaves - participates in photorespiration.

Present in germinating seeds (glyoxysomes) - converts fatty acids into sugars.

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#XL - Q Biochemistry

β oxidation

In mammalian cells, occurs in mitochondria & peroxisomes.

In yeast and plant cells, occurs in peroxisomes.

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β oxidation 

A major function of the oxidation reactions is the breakdown of fatty acid molecules.

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When excess H2O2 accumulates in the cell, catalase converts it to H2O through the reaction.

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Catalase uses the H2O2 to oxidize a variety of other substrates (formic acid, formaldehyde, and alcohol) by the “peroxidation” reaction.

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#XL - Q Biochemistry

Peroxisomes carry out oxidation reactions leading to the production of hydrogen peroxide.