Top answers

Describe the differences and similarities between osmosis and diffusion (4 marks)

Similarities:neither require energyboth move particles from a high concentration to a low concentration area differences:Osmosis requires a partially permeable memberonly water moves by osmosis but liquids a...
BW
Answered by Brian W. • Biology tutor
3567 Views

How does the structure of the grana optimise its function?

The grana is made up of stacked thylakoid membranes which give a larger surface area upon which the photosystems and chlorophyll can trap light energy. The space within the membrane stack allows proton movem...
SM
Answered by Sophie M. • Biology tutor
5948 Views

Name two advantages and disadvantages of hormonal contraception?

One advantages of hormonal contraception are that, when used properly i.e. taken on time and regularly, they are more effective than physical barrier contraceptives such as condoms or diaphragms. However the...
SM
Answered by Sophie M. • Biology tutor
4805 Views

Outline the process of protein synthesis (8 marks).

Firstly, we need to understand what the question title is asking... ' Outline ' means to roughly describe and give a summary of the key points of a ' process ' which is a series of chronological stages. Prot...
NH
Answered by Natalie H. • Biology tutor
11472 Views

Describe the synthesis of glomerular filtrate from the blood

Ultrafiltration in the glomerulus caused by high hydrostatic pressure due to the diameter of the afferent tubule being larger than that of the efferent tubule forcing smaller blood plasma, ions and other bio...
RN
Answered by Ram N. • Biology tutor
3268 Views