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Explain the causes and consequences of sickle cell anaemia (5)

Sickle cell anaemia is caused by a point mutation, exchanging adenine for thymine in the DNA codon CTC. This causes a change in the mRNA to GUG, which results in a change in the polypeptide sequence during p...
AS
Answered by Anna S. • Biology tutor
12741 Views

How do you factorise the following quadratic: x^2 - 5*x - 14?

An example of an application of factorising quadratics is to find the unknown in the equation, x. Factorising means writing the above equation in the form (x+a)(x+b)=0 Using FOIL (First, Outer, Inner, Last) ...
EP
Answered by Emma P. • Maths tutor
4273 Views

Explain the effects of German hyperinflation? (6)

The German hyperinflation of 1923 had severe socio-economic and political consequences for the stability of the Weimar Republic. Economically, the value of the Papiermark rapidly plummeted over the course of...
BS
Answered by Benedict S. • History tutor
5868 Views

Solve x^4+2x^2-3=0

The trick with this question is noticing the hidden quadratic as quartic equations are unsolvable at A-level. Letting u=x^2 the question becomes u^2+2u-3=0 which most students would be able to solve. To fact...
BS
Answered by Ben S. • Maths tutor
7741 Views

Describe and explain the changes organic material undergo in coalification

Organic material accumulates in an area of fast plant growth and anaerobic conditons (which stops the vegetation decaying), such as a tropical delta, the organic material is buried which leads to increases i...
CB
Answered by Callum B. • Geology tutor
2148 Views