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Biology
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How does vaccination work?

Vaccines contain weakened (or attenuated) antigens which cause immunity to a disease without actually giving the person the disease. They are usually adminstered by injection or sometimes orally (by mouth...

LG
Answered by Lizzy G. • Biology tutor
7111 Views

How are action potentials propagated across cholinergic synapses?

In order for action potentials to travel to their intended destination they must cross synapses. These synapses are the spaces between neurones' axon terminals 

HS
Answered by Harry S. • Biology tutor
3061 Views

What is mitosis?

Mitosis is a process whereby the chromosomes (which carry the genetic information) of the cell that were duplicated during replication,to make two identical set of chromosomes, are separated into two nucl...

CM
Answered by Christina M. • Biology tutor
2641 Views

What is the structure of DNA?

DNA stands for deoxyribonucleic acid and is the basic unit of the genetic material that is housed in the nucleus of eukaryotic cells.

DNA was first visualised by Watson and Crick, who described it ...

LR
Answered by Lewis R. • Biology tutor
5980 Views

What is an atheroma and how can it lead to a heart attack?

Atheroma = Formed of a hard fibrious plaque containing fatty streaks that have hardened over time (through damage such as high blood pressure). There is a build up of cholesterol and other insolubl...

KL
Answered by Keeley L. • Biology tutor
12300 Views

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