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Explain the process of phagocytosis

Phagocytosis is a non-specific cellular defence mechanism by the body which is initiated when a pathogen invades the body and has antigens which are detected as antigenic or foreign – note that antigens are ...
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Answered by Sam R. • Biology tutor
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How does DNA replicate?

The first stage involves transcription within the nucleus, the gene of interest is unzipped from it's double helix by enzyme DNA helicase. once single stranded a piece of mRNA which is able to fit through th...
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Answered by Talvin R. • Biology tutor
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Briefly describe the terms "antigen" and "antibody", and describe the structure of the latter. Briefly describe the processes of opsonisation, phagocytosis and destruction of bacteria by macrophages.

An “antigen” is a specific foreign molecular entity which is bound by antibodies during an immune response. Examples of antigens include peptides from bacterial surface proteins, which signal the presence of...
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Answered by Andrew R. • Biology tutor
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explain process of glycolysis

firstly, glucose is converted into glucose phosphate and then into glucose biphoshate through phosphorylation. This process turns two molecules of ATP to ADP. This is then split into two molecules (3 carbons...
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Answered by Yasmin H. • Biology tutor
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Describe the differences between different types of blood vessels

Capillaries-one cell thick, minimal diffusion distanceveins-wise lumen, many elastic fibres, valves presentarteries-thick muscular layer to withstand BP
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Answered by Bela V. • Biology tutor
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