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Explain the lock and key mechanism in relation to enzymes.

The lock and key mechanism is a metaphor to explain the specificity of the enzymes active site and the substrate. In the same way only certain keys fit a lock, only certain substrates fit an enzyme's active ...
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Answered by Aditi M. • Biology tutor
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How is the theme of responsibility explored by J.B Priestley in 'An Inspector Calls'?

An Inspector Calls delves into the theme of responsibility - exploring which different demographics of individuals are willing to take responsibility for the death of Eva Smith. Priestley achieves this by cr...
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Answered by Kia B. • English tutor
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3kg of meat costs £54, Nina buys 2 kg of the meat. Work out how much Nina pays. (non-calculator)

I used ratios in this context3kg : £54Using this ratio to work out the price of 2kg 2kg: £? To get from the number '3' to '2', I have to divide 3 by 3, then multiply it by 2So, using this same method (as I w...
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Answered by Phazilah R. • Maths tutor
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What does speciation mean?

Speciation is the process in which new species arise from exisiting ones. A species is defined as organisms that can reproduce together to produce fertile offspring. This process starts with the isolation of...
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Answered by Saahil H. • Biology tutor
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work out 20% of 14000

First work out 10% of 14000.You do this by dividing 14000 by 10 as this will than be a 10th of 14000 and therefore 10%14000 divided by 10 = 1400as the question asks for 20% you will need to add another 10%14...
Answered by • Maths tutor
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