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Explain the genetic code.

After the cell has carried out the process of DNA transcription, we are left with a transcribed mRNA fragment. This, similar to DNA, is a chain of 4 different bases - cytosine, guanine, adenine and uracil (i...
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Answered by Maja W. • Biology tutor
2567 Views

Describe eutrophication

6 main steps (to be written in continuous prose):Leeching of nitrates causes algal bloomLight is absorbed by allege so no photosynthesis and plants dieCO 2 builds up and no O 2 is producedO 2 is used by aqua...
LD
Answered by Léa D. • Biology tutor
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Describe the key feature of stem cells and discuss their applications in research and medicine. Please provide examples.

Stem cells are undifferentiated cells with the ability to differentiate to form specialised cells, such as erythrocytes and neurons, or to self-renew in order to repopulate and produce more stem cells. Their...
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Answered by Tabitha M. • Biology tutor
2785 Views

How does homeostasis in humans serve to regulate blood water potential?

The water potential of the blood is constantly monitored by specialised sensory neurones in the hypothalamus known as osmoreceptors. When these cells detect that the water potential of the blood is beginning...
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Answered by Jonathan M. • Biology tutor
4993 Views

What is the purpose of mitosis and explain the stages

Mitosis is used for growth, repair and replacement of tissue or in the case of asexual organisms - reproduction. It results in the formation of daughter cells which are genetically identical to the original ...
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Answered by Rebecca H. • Biology tutor
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