Top answers

Biology
All levels

Do you have any exam tips for Biology Paper 2?

So one thing I observed in my Biology class was that students would memorise every single piece of inforrmation about each biological process that was written on their 'comprehensive flashcards'. One thin...

LB
Answered by Louis B. Biology tutor
4039 Views

Can you explain the oxygen dissociation curve? and the Bohr Shift?

As each O2 molecule binds to the haemoglobin, it alters the shape of the protein --> making subsequent binding more favourable. Therefore the affininity for oxygen will be greater in places with a high...

LB
Answered by Louis B. Biology tutor
2342 Views

I'm not sure how to answer the longer-answered questions e.g. those that are 6 marks.

This is a really common question that people ask actually and I struggled with this when I did GCSE. It's a good idea to jot down the points you want to include whilst you're learning how to answer these ...

LB
Answered by Laura B. Biology tutor
3057 Views

Describe the process of ventilation, including the difference between active and passive expiration.

To expand the lungs and fill them with air, thoracic pressure decreases. This is done by the diaphragm contracting and flattening out and the external intercostal muscles raising the ribcage upwards and o...

SG
Answered by Steph G. Biology tutor
9539 Views

Describe how a synapse works to transmit a nervous impulse from one neuron to another neuron.

There is a pre-synaptic and post-synaptic neuron. An impulse stimulates the presynaptic neuron, travelling down to the synaptic bouton. This releases neurotransmitters into the synaptic cleft, which diffu...

SG
Answered by Steph G. Biology tutor
3098 Views

We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning