Search our library of GCSE questions

Top answers

All subjects

GCSE

Describe the structure of the DNA of a eukaryotic cell

DNA is a double stranded helix. Each strand is held together by complementary base pairs or nucleotides. A nucleotide consists of a base, a deoxyribose sugar and a phosphate. The bases are A, T, C and G. ...

Answered by Annie E. • Biology tutor

5193 Views

Give 2 methods of transmission of disease and an example for each

Transmission is the way in which a disease is spread. Transmission of disease can occur in multiple ways. Two methods of this are:1)- vector transmission 2)- waterAn example of vector transmission is tube...

Answered by Judith S. • Biology tutor

2930 Views

Simplify fully the fraction (a^2 + a − 6)/ (ab+3b)

so, let's split the fraction up, into the top half and the bottom half, and deal with each part at a time. The top part of the fraction (numerator) is a^2 +a -6 , and you can see that it is a quadratic eq...

Answered by Sinchana L. • Maths tutor

5218 Views

How to conjugate reflexive verbs in the present and perfect tense

In French, we use reflexive verbs to speak about an action that is done to oneself. We can think about reflexive verbs as reflecting back on the person that is doing the action. For example, I wake

Answered by Laura M. • French tutor

4614 Views

Differentiate (x^2)*(e^x) using product rule

Product rule: d/dx[f(x)g(x)]= f(x)d/dx[g(x)] + g(x)d/dx[f(x)]Let f(x)=x^2 and g(x)=e^xf'(x) = 2x and g'(x) = e^x Therefore,The derivative of (x^2)(e^x) = 2x(e^x) +(x^2)(e^x)

Answered by John B. • Maths tutor

3247 Views