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Describe and explain how an action potential is generated (6 marks)

The membrane is at resting potential, -60mV inside compared to outside. It is polarised. 2. Na+ ion channels open and some Na+ ions diffuse into the neurone. 3. The membrane
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Answered by Rokshan E. • Biology tutor
10098 Views

What is the difference between gene transcription and gene translation?

Both of these are key steps in gene expression to obtain proteins.

Transcription occurs first. It is the process, happening in the nucleus, where a specific segment of DNA is copied into RNA to for...

Answered by Madeleine G. • Biology tutor

6674 Views

What are the properties of water?

This is part of the chemistry of life chapter.

Its important to Biology because :

Water is the medium of life and biology is the study of life.

Water molecules are polar. this means t...

Answered by Shirleen B. • Biology tutor

5144 Views

Enzymes known as endopeptidases aid digestion of proteins in the small intestine. why do they only bind to amino acids and not other foods ingested?

Model Answer: this is because enzymes are a protein with a specific tertiary structure which have an active site that is complementary to the substrate (in this case the amino acids of a protein) ultimate...

Answered by Charlotte B. • Biology tutor

2462 Views

What are the arguments for the endosymbiotic theory?

There are several facts that could prove that mitochondria and plastids - eukaryotic organella descend from prokaryotic organisms. One of the arguments is that the metioned organella posses their own DNA ...

Answered by Dorota D. • Biology tutor

5608 Views