Top answers

Explain 2 adaptations of red blood cells.

Biconcave shape- Increases the surface area of the red blood cell, meaning there is a greater surface over which diffusion of the gases being exchanged can occur (CO2/ O2).No nucleus- Allows red blood cells ...
DP
Answered by Danielle P. • Biology tutor
9180 Views

How do I write an essay under exam conditions?

Exams such as GCSEs and A-Levels are all about ticking off boxes and jumping through hoops. The English education system is designed in such a way that it is best to approach English exams in regard to their...
LB
3838 Views

What are the stages of protein synthesis?

Protein synthesis consists of two stages- transcription and translation . Transcription takes place in the nucleus- this is where a strand of mRNA is formed. A section of DNA is unwound by an enzyme (RNA pol...
YZ
Answered by Yasmin Z. • Biology tutor
9883 Views

Calculate the empirical formula of a compound containing 77.7% Iron and 22.3% of oxygen.

An empirical formula is the simplest whole number ratio of atoms of each element present in the compound.1) Divide by atomic relative mass to find the number of moles. 2) Find a ratio between the moles. 3) D...
JS
Answered by Jeel S. • Chemistry tutor
4781 Views

In the Rutherford alpha scattering experiment, most particles passed straight through the foil with little or no deflection. What can be deduced about the structure of the atom from this?

Answer: Most of the atom's mass must be concentrated in a small area at the centre of the atom. This is known as the nucleus.
MR
Answered by Megan R. • Physics tutor
3022 Views