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Biology
A Level

Explain why a graph showing the substrate concenentration and rate of reaction for an enzyme catalysed reaction plateaus?

Initally, the rate of reaction is able to increase as concentration does because at this point, not all enzymes active sites are occupied. Therefore, by adding more substrate, a higher percentage of enzym...

NW
Answered by Nicholas W. Biology tutor
10293 Views

Explain the process of transcription in living cells

Transcription factors together with enzymes such as DNA topoisomerase and DNA helicase reach the gene of interest. These enzymes uncoil the DNA and revelea the two strands of DNA that are wrapped around h...

TD
2848 Views

What is ATP? Explain its structure, synthesis and function.

ATP, which stands for adenosine triphosphate, is a biomolecule formed by a purine base (adenine), a sugar molecule (ribose) and three phosphate groups. Its main function is to store energy within the cell...

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Answered by Alba R. Biology tutor
36570 Views

What types of infectious agents are there?

Bacteria (prokaryotes) 1-5 micrometers, contain RNA and DNA, can synthesise and metabolise protein, generally free livingMajority are harmless, but a certain small list can cause infectious diseasesOne of...

AT
Answered by Adam T. Biology tutor
2505 Views

Albumin (a globular protein) is a solute found in blood plasma. In liver disease, people cannot produce sufficient amounts of albumin. Describe and explain how this change would affect red blood cells.

The solute potential of the blood plasma would be less negative or higher. Higher solute potential = higher water potential. 

Water moves via osmosis from areas of high water potential to low water...

CD
Answered by Caolan D. Biology tutor
9238 Views

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