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How to write an essay which will get me top marks in my exam

Essays in biology? Right I wasnt the only surprised one when I first heard about it. The main concept is that these essay titles are diverse and can range from a whole multitude of topics. But why is my essa...
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Answered by Bilal R. • Biology tutor
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How is an action potential fired?

When a neurone is at rest, the outside of the neurone is more positive than the inside. This is due to the sodium-potassium pump which actively pumps 3 Na+ outside the cell, whilst at the same time pumping 2...
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Answered by Eleanor B. • Biology tutor
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Explain how type 1 diabetes occurs

Type 1 diabetes occurs when the immune system to fails to identify a group of cells in the pancreas called the beta islet of Langerhans cells as 'self' cells. This means that they are recognised as 'foreign'...
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Answered by Emma R. • Biology tutor
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What is a mutation and what are they caused by?

A mutation is a change in the base sequence of DNA. A mutation can be caused by a mistake during replication of DNA or by mutagenic agents. Mutagenic agents include chemicals that can act as bases or radiati...
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Answered by Nadine K. • Biology tutor
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What is transcription?

Transcription is the process of making DNA into mRNA. DNA first has to be transcribed into messenger RNA (mRNA), this mRNA can then be translated into a protein (amino acids). DNA Polymerase (an enzyme) bind...
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Answered by Nadine K. • Biology tutor
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