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Describe how a non-competitive inhibitor works to inhibit the activity of an enzyme.

Non competitive inhibitor binds to allosteric site of the enzyme (does not bind to the active site of the enzyme). This binding alters the tertiary structure of the protein meaning that the active site of th...
AC
Answered by Adam C. • Biology tutor
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John begins to exercise and his heart rate increases - explain how and why his heart rate increases

His heart rate increases as his cellular demand for oxygen increases and the amount of carbon dioxide in his blood increases, this is due to an increase in the rate respiration because of increased ATP deman...
SM
Answered by Sian M. • Biology tutor
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Enzymes are proteins. Antarctic fish may have different structure of enzymes to non-antarctic fish. Explain how their enzyme structure may be different.

Enzymes would have different sequence of amino acids and therefore different primary structure. This would result in different shape of a protein ie their tertiary or, if present, quaternary structure.
DR
Answered by Daria R. • Biology tutor
6398 Views

How is ATP generated via the electron transport chain?

Electrons travel down the electron transport chain via electron carriers at successively lower energy levels. This causes protons to be pumped into the intermembranal space, establishing an electrochemical p...
LC
Answered by Leo C. • Biology tutor
3287 Views

Explain the process of synaptic transmission.

The arrival of an action potential at the presynaptic neurone causes voltage gated Ca2+ channels to open, allowing Ca2+ to diffuse into the synaptic knob. The increased intracellular Ca2+ concentration in th...
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Answered by Sophia M. • Biology tutor
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