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Describe the process of DNA transcription:

The DNA double helix unravels as helicase breaks the hydrogen bonds between base pairs. RNA polymerase binds to the promoter region on the DNA strand. The RNA polymerase transcribes the DNA coding strand by ...
EC
Answered by Erin C. • Biology tutor
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Compare anaerobic respiration in a yeast cell with anaerobic respiration in a muscle cell.

Anaerobic respiration in yeast cells produces carbon dioxide and ethanol. Whereas anaerobic respiration in muscle cells produces lactic acid only.Both, however, do produce little amounts of ATP (energy)
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Answered by Chloe S. • Biology tutor
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Describe the process of the Krebs cycle.

Acetyl CoA (2 carbon compound) from the link reaction combines with a 4 carbon compound called oxaloacetate. This reaction releases the CoA enzyme allowing it to be re-used. The now 6 carbon compound (citric...
CS
Answered by Chloe S. • Biology tutor
10391 Views

In a healthy person the blood glucose level in the hepatic vein fluctuates much less than that in the hepatic portal vein. Explain why.

Firstly, blood glucose in the hepatic portal vein increases after a meal and this is due to the hepatic portal vein transporting blood from the gut to the Liver. Therefore, blood glucose will increase as foo...
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Answered by Lucinda G. • Biology tutor
22146 Views

Describe the effects of nitrogen and phosohorus fertiliser leaching into a lake

This will cause eutrophication. Under normal circumstances, nutrients are a limiting factor for algal growth. When the fertiliser leaches into the lake, the excess nutrients will therefore allow algae at the...
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Answered by Alasdair R. • Biology tutor
4546 Views