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Biology
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Explain the process of synaptic transmission

An action potential reaches the presynaptic neurone. This causes calcium channels to open, leading to calcium ions entering the synaptic knob via facilitated diffusion. This causes synaptic vesicles conta...

Answered by Thomas K. Biology tutor
2197 Views

What is the difference between transcription and translation?

(Insert diagram of the central dogma DNA -> RNA -> Protein)Transcription is the process of converting DNA to RNA. First, within the nucleus, DNA helicase

Answered by Sabahat S. Biology tutor
2090 Views

What is mRNA splicing and why is it important?

mRNA splicing is a form of post-transcriptional modification of the mRNA transcript. DNA is made up of coding regions called Exons. These determine the amino acid sequence of a polypeptide chain during pr...

Answered by Katherine P. Biology tutor
8766 Views

Explain why having more red blood cells per cm3 of blood is an advantage to an athlete. (3 Marks)

Red Blood Cells (RBC’s) contain haemoglobin. Therefore, more RBC’s results in more haemoglobin present.Haemoglobin carries oxygen, therefore, more oxygen can be transported to cells such as muscle cells.M...

Answered by Bradley-James G. Biology tutor
19399 Views

Some poisons work by interfering with synaptic transmission at a neuromuscular junction. Describe the events at a synapse which lead to an action potential.

Across a membrane, there is a voltage at rest and this is known as the resting potential. This is deermined by the membrane permeability to different ions ie which ion channels are open at rest, and also ...

Answered by Leena C. Biology tutor
1964 Views

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