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Describe the path of a red blood cell through the heart

Red blood cell arrives from the inferior vena cava into right atrium before it passes through the tricuspid valve into right ventricle. It then passes through the pulmonary valve into pulmonary artery before...
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Answered by Robert W. • Biology tutor
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Define the term relative isotopic mass. (2 Marks)

Mass of the isotope/atom compared to 1/12th the mass of an atom of Carbon 12 (12C)
TD
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(Substrate) is hydrolysed by (Enzyme). Explain why (Enzyme) catalyses only this reaction. (3 Marks)

Active site of (enzyme) has a specific active site, complementary to (substrate). Only that (substrate) can bind to this active site to form an enzyme substrate complex.
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Discuss the view that pressure groups make the UK more democratic.

Split into yes v no, with around 2 or 3 paragraphs for each side of the argument (depending on marks for the question). Yes: they represent minority views (with about 3 different pressure group examples focu...
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Answered by Annabel G. • Politics tutor
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How do I think of evaluation points in exam essays?

It's impossible to remember evaluation points for every possible essay that may come up on the exam, so it's a good idea to always think of what's covered in the Issues and Debates topics, and apply it to th...
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Answered by Oscar J. • Psychology tutor
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