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Describe the similarities and differences between DNA and RNA structures

Structurally, DNA and RNA are very similar. They're both composed of a backbone of sugar, a phosphate group and a chemical base. However, the sugar in DNA is a deoxyribose sugar and the sugar in RNA is a ...

Answered by Shannon M. • Biology tutor

8768 Views

I’ve been taught two methods for solving pairs of simultaneous equations. When should I use which?

You’ve been taught elimination and substitution. (You should also be able to solve simultaneous equations graphically.) In the elimination method, you multiply up the equations to make them have a term th...

Answered by Rosemary M. • Maths tutor

7587 Views

Simplify Fully 4(2x+1)-2(x-5) .

First concentrate on expanding out the first set of brackets: 4(2x+1).Multiply the contents of the bracket by 4, giving 8x+4.Next concentrate on expanding out the second set of brackets not forgetting ...

Answered by Sanju S. • Maths tutor

4170 Views

How does Simon Armitage portray the relationship between father and son in his poem 'Harmonium'?

The poem starts off with a tone of reminiscence, with the harmonium 'gathering dust', showing that it has clearly been forgotten in the church for many years, echoing the type of nostalgic relationship be...

Answered by Sasha B. • English Literature tutor

7764 Views

Find the max/min value of the function: f(x) = 5x^2 - 20x + 15

A quadratic function will either have a minimum or a maximum value depending on the shape of the function. A quadratic function with a positive value in front of the x^2 term has a U shape and therefore h...

Answered by Peter H. • Maths tutor

5128 Views