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What is an enzyme? Can you provide an example of an enzyme found in plants and describe its function? (4 marks)

An enzyme is a protein that is a biological catalyst (meaning it speeds up the rate of a reaction). The most abundant enzyme on earth, Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco), is an enzyme ...
Answered by • Biology tutor
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How can I effectively structure a comparative essay for an English Literature A Level examination?

For English Literature examinations, being able to effectively structure a comparative essay is an important, but sometimes challenging, skill. Thankfully, there are some really simple yet effective techniqu...
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To what extent was Lenin a 'Red Tsar'?

The way in which government was structured and organised under Lenin is indicative of more continuity than change, suggesting that he was in fact a 'Red Tsar'. When Lenin came to power in October 1917, he of...
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Answered by Xanthe R. • History tutor
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A 1000 cm3 container of ammonia (NH3) has a mass of 20.7g, it is stored at room temperature (298 K). When empty the container has a mass of 20.0 g, calculate the pressure inside the container in kPa to an appropriate number of significant figures.

Using PV = nRT, make a note of the information you have, what you can calculate and what you need to find. P <-- need to find this V = 1000 cm 3 n <-- can be calculated from mass = mr X mol since we kn...
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Answered by Natalie B. • Chemistry tutor
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‘King Lear is a play which brings us closer to the apocalypse than to resolution’ Discuss

(I think essay plans are the most effective)First consider if you agree with the statement.Apocalypse is shown through the collapse of justice. This is exemplified through King Lear's actions (love test etc)...
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