Cellular location of glycolysis

Glycolysis takes place in the cytosol, the fluid component of the cytoplasm. It does not require a mitochondrion. Both cells with mitochondria and cells without them can use glycolytic reactions.

Meaning and context

The pathway converts one glucose molecule into two pyruvate molecules through a sequence of reactions. In the standard overview, it yields a net two ATP and two NADH per glucose. The later fate of pyruvate depends on the organism and conditions.

Examples and usage

In a eukaryotic cell, locating glycolysis in the cytosol distinguishes it from the citric acid cycle and oxidative phosphorylation associated with mitochondria. A diagram labeling all cellular respiration as mitochondrial is therefore too broad.

What to check

Cytoplasm includes more than cytosol, so cytosol is the more precise location term. Different organisms can modify the broader metabolic picture. For a classroom question, identify whether it asks for this pathway specifically or for the whole sequence of respiration.

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