Top answers

Biology
A Level

What are the 2 types of enzyme inhibition and how do they work?

The 2 types are: Competitive and Non-competitive.
Competitive inhibitors work by mimicking the shape of the substrate, they are specific to the shape of the active site of the enzyme and will take th...

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Answered by Soham C. Biology tutor
2716 Views

Detail the pathway of oxygenated water in the ventilation of a fish. Name and briefly describe the mechanism by which gaseous exchange takes place.

Oxygen rich water enters the mouthdue to buccal expansion > water is accelerated across the gill filamentsdue to simultaneous contraction of the buccal cavity and expa...

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Answered by Owen F. Biology tutor
2567 Views

Using knowledge of the pathogenicity of HIV, explain why it can't be transmitted through inanimate objects or hand shakes with an infected person.

HIV is a virus and therefore obligately intracelluar, with a very short survival time outside of its host.

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Answered by Owen F. Biology tutor
2063 Views

How can antibody neutralisation of pathogenic antigens help prevent cellular damage? (4 marks)

Prevent:Antigen attachment to cell > cell invasion > pathogen replication > toxin production.

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Answered by Owen F. Biology tutor
2225 Views

Define "cellular immune response".

An immune response mediated by T lymphocytes.

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Answered by Owen F. Biology tutor
2688 Views

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