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What is the difference between transcription and translation?

Transcription - involves making mRNA from DNA. It happens inside the nucleus Translation - using the mRNA as a set of instructions to make a polypeptide. Happens at the ribosome. More in depth transcription....
LM
Answered by Lauren M. • Biology tutor
4978 Views

Explain why the atrioventricular valves open and close during the cardiac cycle.

Pressure is related to volume, and a larger volume means a lower pressure. The pressure in the atria is low initially as it is relaxed (diastole). Blood flows from high to low pressure, and this means that t...
EC
Answered by Ellie C. • Biology tutor
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Draw the structure of a cell membrane (6 marks).

I would draw a diagram showing the structure of a cell membrane and explain each of the parts:The cell membrane is composed of a phospholipid bilayer which is composed of a hydrophilic head and a hydrophobic...
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Answered by Pravir M. • Biology tutor
2810 Views

How is immunity reached after a vaccine is given? Include the roles of both T cells and B cells.

The vaccine contains either dead or attenuated pathogens, or they can contain just antigens from the pathogen. When one is injected with a vaccine the white blood cells within the body are able to recognise ...
CL
Answered by Chizara L. • Biology tutor
3025 Views

what is the site of gas exchange in the lungs

the alveoli (air sacs that follow from the bronchioles)
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Answered by Sito E. • Biology tutor
2990 Views