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Explain the 3 types of DNA mutation substitution?

For DNA there are 4 types of bases: A, T, C, G.A codon is made from 3 bases, and codes for either an amino acid, or a stop.Mutation substitution means that one base is replaces by another base, eg: an “A” be...
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Answered by Alisha S. • Biology tutor
4150 Views

What is the distance between the points with co-ordinates (3,2) and (7,9)?

This question can be approached using the Pythagoras Theorem, with the line connecting these 2 points being the hypotenuse (longest side of the triangle). Side lengths:1) 7-3=4 2) 9-2=7Therefore, the distanc...
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Answered by Shanmukan S. • Maths tutor
3222 Views

The perimeter of a right-angled triangle is 72 cm. The lengths of its sides are in the ratio 3 : 4 : 5 Work out the area of the triangle.

Draw the triangle - recognising that it is a right angled trianglefind the scale factoruse the formula: 0.5 x base x height = area To find the scale factor you must divide the total perimeter by the sum of t...
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Answered by Stella C. • Maths tutor
3273 Views

The maximum speed this cyclist can travel on a level road is 14 m/s. How does cycling uphill affect the maximum speed of this cyclist? Explain your answer.

Maximum speed is lower This is because maximum power output of cyclist is constant but additional work is done against gravityGravitational potential energy of the cyclist is increasedPower in = total energy...
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Answered by Stella C. • Physics tutor
14913 Views

Why does graphite conduct electricity while diamond doesn't?

I'd start by asking the student what they knew about the structures of diamond and graphite, and asking them what they understood by the keyword "allotrope". If they were able to draw/ describe the...
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Answered by Lauren P. • Chemistry tutor
5062 Views