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Biology
A Level

The drug Atropine blocks the action of of acetylcholine on structures innervated by post-ganglionic cholinergic neurones.

State precisely which part of the nervous system will be affected by atropine and suggest why atropine might be used during anesthesia.

Answer:

It acts on the parasympathetic branch of the a...

RM
Answered by Rana M. Biology tutor
4306 Views

What is transcription?

Transcription is the process of sections of DNA being converted into mRNA (messenger RNA) that occurs in the nucleus of a cell. DNA is made up of a template strand and a coding strand whi...

CM
Answered by Carolina M. Biology tutor
4627 Views

How is an action potential formed when the neurone is stimulated?

When the neurone is stimulated, the Na+ channels open to allow influx of sodium ions down its electrochemical gradient. This makes the inside of the cell less negative. When threshold voltage (-55m...

IC
Answered by Ismael C. Biology tutor
2956 Views

Describe the benedicts test for non reducing sugars

  1. heat with HCl 2) neutralise with NAHCO3 3) add benedicts soln and gently heat in a water bath 4) if the soln changes colour from blue to a brick red precipitate, then non reducing sugars were involv...
SS
Answered by Sagar S. Biology tutor
10268 Views

During the redox reaction in glycolysis, which molecule acts as the oxidising agent?

The oxidation of glyceraldehyde 3-phosphate (G3P), a three-carbon sugar, yields energy. In this oxidation, electrons and H+ are transferred to NAD+, forming NADH, and a phosphate group is attached to the ...

DA
Answered by Daniel A. Biology tutor
8670 Views

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