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Biology
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Describe the process of phagocytosis of a pathogen.

The membrane of the phagocyte surrounds the pathogen and engulfs the pathogen. Enzymes inside the phagocyte break down the pathogen and destroy it. Pathogen proteins can then be presented on the surface o...

HB
Answered by Harriet B. Biology tutor
2741 Views

Explain how monoclonal antibodies are formed and suggest a potential use for monoclonal antibodies.

Monoclonal antibodies are antibodies that are produced by identical immune cell clones that only target one specific antigen. Monoclonal antibodies are produced after the target antigen i...

AA
Answered by Ann A. Biology tutor
3477 Views

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 ...

LM
Answered by Lauren M. Biology tutor
4141 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 tha...

EC
Answered by Ellie C. Biology tutor
10168 Views

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 hydropho...

PM
Answered by Pravir M. Biology tutor
2192 Views

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