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Describe how phagocytosis of a virus leads to presentation of its antigen

The phagosome containing the virus fuses with the lysosome, which then releases hydrolytic enzymes. These enzymes then destroy the virus, and the antigens from the virus are consequently incorporated into th...
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Answered by Sam F. Biology tutor
5315 Views

How does an action potential travel between two neurones?

When an action potential reaches the end of one neurone, it cannot simply move to the next one as there is a gap (the synapse or synaptic cleft ) between the two neurones. Instead, when the action potential ...
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Answered by Alice F. Biology tutor
3107 Views

Why are antibiotics not used to treat viral infections?

Antibiotics target a variety of sites on bacteria (disruption DNA or cell wall or protein synthesis). These are not found in viruses - viruses lack cell walls, ribosomes or cell membranes.Antibiotics would n...
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Answered by Karl L. Biology tutor
4216 Views

Give one method of immobilising an enzyme. What are the benefits of using immobilised enzymes?

Methods:encapsulate in sodium alginate beadstrap in the pores of silica geladsorption onto glass or clay or resinwithin a polymer or microspheresby covalent bonding to a support material such as collagen Ben...
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Answered by Karl L. Biology tutor
2862 Views

Describe the physiology of the pancreas

The Pancreas is a special organ found in the abdominal cavity. What is unusual about the pancreas is that it has both an endocrine and an exocrine function. An endocrine function is when the organ produces a...
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Answered by Scott W. Biology tutor
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