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Phosphorylation

Glycolysis can be considered to be divided into three main steps. The first is phosphorylation of the glucose molecule to make it more reactive, the second is lysis and the third substrate-level phosphorylation.Two molecules of ATP are used to phosphorylate glucose.Hexose bisphosphate is produced. This molecule is easier to break down than glucose.

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Specification: AQA Biology (7402), A-level, 3.5.2 Respiration. Topic: Respiration.

Key terms in this lesson

medulla oblongata
The region of the brain containing the cardiovascular centre, which regulates heart rate via the sympathetic and parasympathetic nervous systems.
sarcomere
The contractile unit of a myofibril, delineated by two Z-lines, containing overlapping actin and myosin filaments.
actin
A thin protein myofilament in a myofibril that, together with myosin, slides during muscle contraction; its myosin-binding sites are covered by tropomyosin in resting muscle.
myosin
A thick protein myofilament with a hinged globular head that binds to actin and ATP and pulls actin filaments during muscle contraction.

More in Respiration

All 12 lessons in Respiration · All AQA A-level Biology topics