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Biology
A Level

Aspartic Acid and Proline are both part of the 20 basic amino acids. Describe their similarities and differences in terms of their properties.

As we know there are 20 fundamental amino acids used for protein synthesis. Both Aspartic Acid and Proline are such amino acids. They are composed of the typical amino acid carbon skeleton (R-CH-COOH) and...

Answered by Danai Athina I. Biology tutor
7797 Views

Describe how a vaccine results in the production of antibodies against a disease causing organism.

The vaccine contains parts of the pathogen that are recognised by the immune system, these are called antigens. The antigen is recognised by innate immune cells such as macrophages that will engulf the pa...

Answered by Anna C. Biology tutor
2046 Views

Describe how a non-competitive inhibitor works to inhibit the activity of an enzyme.

Non competitive inhibitor binds to allosteric site of the enzyme (does not bind to the active site of the enzyme).
This binding alters the tertiary structure of the protein meaning that the active si...

Answered by Adam C. Biology tutor
6012 Views

John begins to exercise and his heart rate increases - explain how and why his heart rate increases

His heart rate increases as his cellular demand for oxygen increases and the amount of carbon dioxide in his blood increases, this is due to an increase in the rate respiration because of increased ATP de...

Answered by Sian M. Biology tutor
2248 Views

Enzymes are proteins. Antarctic fish may have different structure of enzymes to non-antarctic fish. Explain how their enzyme structure may be different.

Enzymes would have different sequence of amino acids and therefore different primary structure. This would result in different shape of a protein ie their tertiary or, if present, quaternary structure.

Answered by Daria R. Biology tutor
5459 Views

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