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Biology
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There is an increasing worry about the rise of antibiotic-resistant bacteria, such as MRSA. How can doctors ensure that this threat is minimised? (2 marks)

Doctors can ensure that there is a reduced number of antiobiotics prescribed for patients. They can also make sure that patients are fully evaluated so as to stop the prescription of antibiotics for viral...

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Answered by Alex T. Biology tutor
2276 Views

What is the refractory period of a nerve action potential?

The refractory period is composed of two parts. The first part is the absolute refractory period in which another action potential cannot be stimulated in the nerve. In the relative refractory period that...

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Answered by Karthik K. Biology tutor
10882 Views

Describe the events which normally occur between the arrival of an action potential at the synaptic knob and its transmission across a neuromuscular junction.

Voltage gated calcium channels open in response to the action potential reaching the presynaptic knob. Calcium ions diffuse into the celll down their concentration gradient. This results in synaptic vesic...

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Answered by Victoria S. Biology tutor
6071 Views

What is the difference between osmosis and diffusion.

Firstly, it is important to read the question, it says what is the difference so we need to look at the differences between the two processes. Diffussion is the movement of particles from an area of high ...

AZ
Answered by Ashkun Z. Biology tutor
27778 Views

How is DNA replicated?

Scientists have proposed several models of DNA replication but the currently accepted model is called the 'Semi-Conservative' model. The Semi-Conservative model of DNA replication was discovered by two sc...

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Answered by Gurpreet D. Biology tutor
5473 Views

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