Top answers

Not all mutations lead to changed in amino acid sequence of polypeptides. Explain why.

Amino acids are the building bricks of life. Redundency occured with in their coding however. A single Amino acid may be coded for by more than one codon (a sequence of three nucleic acids) and therfore muta...
JS
Answered by Jonathan S. • Biology tutor
3021 Views

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 the place ...
SC
Answered by Soham C. • Biology tutor
3688 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 mouth due to buccal expansion > water is accelerated across the gill filaments due to simultaneous contraction of the buccal cavity and expansion of the opercula > gaseous ...
OF
Answered by Owen F. • Biology tutor
3446 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.
OF
Answered by Owen F. • Biology tutor
3023 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.
OF
Answered by Owen F. • Biology tutor
2886 Views