Search our library of A Level questions

Top answers

All subjects

A Level

The points A and B have coordinates (1, 6) and (7,− 2) respectively. (a) Find the length of AB.

AB²= (1 - 7)² + (6 + 2)² = 36 + 64 = 100 If AB² = 100 then AB = 10

10307 Views

Calculate the shaded finite region between the curve and the axis for the curve: 3x^2 +11x -4 = 0

3x²+11x-4=0 #Factorise to find where the curve crosses the x axis (3x-1)(x+4)=0 #Each bracket equals 0 x=1/3, -4 #Integrate the curve between these two points to find the area enclosed in the ...

Answered by Hugo F. • Maths tutor

3577 Views

Consider the importance of age of US voters as a factor influencing voting behaviour

Age is a primacy social factor that influences how a voter casts their vote. One way age is a factor is that there is a trend showing that younger voters are more likely to vote Democrat and older voters ...

Answered by Joanna C. • Politics tutor

6836 Views

What are three differences between DNA and RNA? ( 3 marks)

RNA is single stranded whereas DNA is double stranded - RNA has the bases A,G,C and U whereas DNA has the bases A,G,C and T - An RNA nucleotide has ribose as its sugar component whereas a DNA nucleo...

Answered by Prahalad N. • Biology tutor

2980 Views

It has been suggested that smoking, an epigenetic factor can lead to tumour growth and cancer. Use your knowledge of the epigenome and its structure to explain how this could occur. [5 marks]

Marking Scheme: MP1: Define epigenome- layers of chemical tags covering the DNA and histone protein complex MP2: Increased Methylation of DNA molecule MP...

Answered by Hannah H. • Biology tutor

2790 Views