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Name the three components that make up a nucleotide

First of all a nucelotide is the monomer that makes up DNA. Millions of monomers are joined together to form the double helix of a DNA molecule. A nucleotide is made of a pentose sugar (in the case of DNA th...
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Answered by Amy S. • Biology tutor
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Is all of a persons DNA used to create the body?

This is a common question. After learning about translation in A-level biology and the importance of converting DNA into proteins (the building block of organisms), students often assume that all DNA is used...
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Answered by Jemima S. • Biology tutor
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What is a synapse and how does information pass across a synapse?

A synapse s a junction between two neurones. Neurotransmitters are relased from one neurone and diffuses across the synapse to stimulate the next neurone.
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Answered by Lucy O. • Biology tutor
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Explain the need for enzymes in digestion.

Enzymes increase the rate of digestion. At body temperature it would be too slow without them. Enzymes break down large insoluble molecules into small soluble molecules so that they can be absored into the b...
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Answered by Caroline O. • Biology tutor
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Describe how ventilation of the lungs occurs.

Ventilation is the process of moving air in and out of the lungs. This is brought about by pressure changes in the thoracic cavity. During inspiration, the diaphragm contracts causing it to flatten and move ...
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Answered by Emily S. • Biology tutor
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