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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....
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Answered by Lauren M. • Biology tutor
5004 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
13160 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 ...
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Answered by Chizara L. • Biology tutor
3039 Views

How does osmoregulation occur in the kidney?

The tubule fluid enters the collecting duct (CD) where the final water reabsorption occurs before the fluid is excreted as urine. Osmoreceptors in the hypothalamus detect the concentration of the blood (wate...
KD
Answered by Kelly D. • Biology tutor
8541 Views

How do phospholipids form membranes?

Phospholipids are a major component of cell membranes. They are ideal components of membranes due to their structure. They consist of a glycerol and phosphate 'head' attached to two fatty acid 'tails'. The t...
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Answered by Lauren E. • Biology tutor
17342 Views