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What is the role of the nucleus?

The nucleus is the most important organelle of the cell and acts like a blueprint for how all the cells in your body function. The nucleus also acts as a vault to hold the DNA securely. The main function of ...
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Answered by Ameliya D. • Biology tutor
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How does Haemoglobin work?

Haemoglobin is a protein made up of 4 sub-units. Each sub-unit has a molecule of un-oxygenated Iron. Oxygen covalently bonds to the Iron and is thereby carried by the blood as Oxy-haemoglobin. Oxy-haemoglobi...
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Answered by Conor J. • Biology tutor
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Define an organ

A group of similar tissues that work together to perform a particular function.
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Answered by Jonathan J. • Biology tutor
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What changes happen in the chest to allow us to breath in and out?

Air always moves from an area of higher pressure to an area of lower pressure, an example of this is when there is a puncture in a tyre. The air in the tyre is at higher pressure than normal and so when the ...
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Answered by Benjamin G. • Biology tutor
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What is the difference between a competitive and a non-competitive inhibitor?

Inhibitors are molecules that stop substrates from being able to bind to their enzymes, and therefore inhibit the action of specific enzymes. A competitive inhibitor is an inhibitor which has a similar shape...
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Answered by Sreya C. • Biology tutor
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