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What is the role and structure of enzymes in the human body?

The role of enzymes are to act as a catalyst to speed up the rate of chemical reactions within the human body. They do this by binding to a molecule or substrate and breaking it up or by combining two molecu...
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Answered by Clement H. • Biology tutor
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Calculate the length of side AB (opposite) in a right angled triangle, where angle C is 32 degrees and length of BC (hypotenuse) is 8cm.

First, we can draw a diagram to visualise the triangle and the elements of the question. Looking at this, we can see that we know the length of the hypotenuse (H) and we need to calculate the length of the o...
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Answered by Prachi A. • Maths tutor
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Work out: 20% of 12000

First, work out 10% of 12000 as this is a much easier calculation. To do this, one "0" can be taken off the end of the number, to give 1200. Then, to work out 20%, we know that 10x2 = 20. So, 10% o...
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Answered by Chelsea C. • Maths tutor
55887 Views

x^2+7x+6=0. Factorise the quadratic equation

x 2 +7x+6=0First identify factors of 66x1=63x2=6Then look at these pair and see if either of the can be added/subtracted from each other to give the value of 7. Therefore you would use 6+1=7These will then b...
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Answered by Emily F. • Maths tutor
3670 Views

What are covalent and Ionic bonds and how do they differ?

Covalent bonds are formed as a result of the sharing of pairs of electrons between atoms in order to attain a full outer shell. This typically will happen between two non metals. An ionic bond has the same a...
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Answered by Ben S. • Chemistry tutor
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