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What is mRNA?

mRNA is one of the 3 types of RNA: the others being tRNA and rRNA. They all play a role in protein synthesis. mRNA stands for messenger ribonucleic acid. It is made by copying a strand of DNA called the t...

Answered by Lucie C. • Biology tutor

21429 Views

Where do I start with poetic close analysis?

The tool that revolutionised the way I learned for A-Level English is one I wish I'd learned earlier. First of all, try to put all pre-conceptions you have of the piece aside. These are useful once you've...

Answered by Sarah H. • English tutor

2150 Views

What are the different types of transport across a membrane?

The different types of transport across a membrane can be divided into two main categories: active and passive transport. Active transport requires metabolic energy in the form of ATP and molecules are mo...

Answered by Steph F. • Biology tutor

14032 Views

How to factorise a quadratic with a coefficient of x^2 greater than one, for example 4x2+4x-15?

Firstly, label each coefficient: coefficient in front of x2 “a”, is equal to 4. “b” is the coefficient in front of x is equal to +4 “c” is equal to -15

The procedure for factorising starts with wo...

Answered by Bhavin S. • Maths tutor

8316 Views

The circle c has equation x^2 + y^2 = 1. The line l has gradient 3 and intercepts the y axis at the point (0, 1). c and l intersect at two points. Find the co-ordinates of these points.

The first step would be to form an equation for the line l. Using y=mx+c, and the information provided in the question, the equation for line l is y=3x+1. To find the coordinates of where c and l intersec...

Answered by Dilan P. • Maths tutor

8283 Views