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Explain the process of DNA replication in prokaryotes.

Replication involves the synthesis of the leading and lagging strand which occur in a 5' to 3' direction. First helicase unwinds the DNA strand, while topoisomerase relieves the strain created by the unwi...

Answered by Kristen K. • Biology tutor

3191 Views

Why does cholesterol need to be reduced and how do statins do this?

-High levels of cholesterol (especially LDL's, the 'bad' type) clog the arteries with a thick fatty substance

-This causes narrowing of the coronary arteries (which carry blood to the heart)

Answered by Isobel P. • Biology tutor

2333 Views

Can you explain the process of synaptic transmission?

A synapse is the junction between a neurone and the next cell. At the synapse there is both a presynaptic neurone, with vesicles containing neurotransmitters (chemical messengers) and a post synaptic neuo...

Answered by Jack D. • Biology tutor

3278 Views

Explain the role of Calcium in muscle contraction

Action potential that travels down the motor neuron and reaches neuron terminal causes release of Calcium form sarcoplasmic reticulum. This released calcium will reveal binding sites on actin, hence expos...

Answered by Stasa T. • Biology tutor

21577 Views

Identify 3 different antibiotics and describe how they work.

Antibiotics are important for treating bacterial infections that may be making us ill. There are many different antibiotics that work in different ways, and therefore they are suitable for treating differ...

Answered by Madeleine H. • Biology tutor

2792 Views