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Biology
A Level

How does homeostasis work to control temperature in the body? (high temperature example)

Homeostasis works as a negative feedback mechanism meaning when a certain factor goes too high or too low the body will work to reverse it and bring it back to normal i.e. if temperature ...

AH
Answered by Alex H. Biology tutor
8461 Views

Explain how a mutation can cause cancer.

Proto-oncogenes and the tumour suppressor genes are the two different genes that control cell division. A mutation in the tumour suppressor gene can cause it to deactivate because tumour suppressor genes ...

GS
Answered by Gina S. Biology tutor
3842 Views

Why is the actual yield of ATP during aerobic respiration lower than the theoretical yield of 38 ATP molecules?

Although the theoretical yield can be up to 38 ATP molecules per molecule of glucose, this yield is very rarely achieved. It is important to consider at which stages the losses o...

MT
Answered by Milton T. Biology tutor
40458 Views

Explain the stages of protein synthesis

Transcription - occurs in the nucleus. 

to prevent damage to the DNA, when a protein is required to be synthesised, a copy of that particular gene is encoded onto an mRNA (messenger RNA) molecule.T...

SK
Answered by Simran K. Biology tutor
3767 Views

Describe how the structure of glycogen allows it to perform its function and explain the advantages to animals of using glycogen as an energy store.

Glycogen is a polysaccharide composed of alpha glucose monomers which are a respiritory substrate involved in the production of energy (ATP). 1-6 glycosidic bonds between glucose allow glycogen to be bran...

FA
Answered by Fraser A. Biology tutor
44611 Views

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