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Explain and describe how vaccinations prevent illness.

Vaccinations involve introducing a small amount of dead or inactive form of a pathogen into the body. This stimulates white blood cells to produce complementary antibodies to destroy the pathogen. This is ca...
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Answered by Francesca S. • Biology tutor
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What are the four stages of cell mitosis?

The four phases are - prophase, metaphase, anaphase and telophase. This can be remembered as P-MAT. The first phase, prophase, is where the chromatids condense into chromosomes, making them visible. The seco...
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Answered by Eloise H. • Biology tutor
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What is the function of a capillary and how is it adapted to carry out this function?

Capillaries deliver blood to individual cells in the body, supplying them with oxygen and nutrients and removing waste products such as carbon dioxide . Capillaries are able to do this because their walls ar...
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Answered by Alice S. • Biology tutor
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How is the tertiary structure of an enzyme important to its function?

The tertiary structure involves four types of bonds being made between secondary alpha helices or beta pleated sheets. These are disulfide bridges, hydrophilic/hydrophobic bonds, ionic bonds and hydrogen bon...
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Answered by Jessica B. • Biology tutor
22076 Views

What are the main differences between RNA and DNA molecules?

When it comes to structure single strands of DNA and RNA are highly similar. However, there are few major differences which reflect the different functions of these molecules. Namely, DNA acts as a genetic i...
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Answered by Ted R. • Biology tutor
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