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Biology
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How does vaccination lead to immunity?

Vaccination involves administering a dead or inactive form of a pathogen to a subject, which stimulates white blood cells into producing antibodies specific for that pathogen. If the subject encounters th...

TD
3021 Views

Describe how you can distinguish between a bacterium and a virus.

Viruses are generally smaller than bacteria and are not living, whereas bacteria are considered as living species as a prokaryote. Viruses have no cytoplasm, cell membranes or cell wall and instead have a...

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Answered by Keshana K. Biology tutor
3329 Views

What is the difference between mitosis and meiosis?

Mitosis is a process associated with organism growth, and it involves a tetraploid cell dividing to give two genetically identical diploid cells. Meiosis is the process by which gametes are formed, and it...

TD
2968 Views

There is an increasing worry about the rise of antibiotic-resistant bacteria, such as MRSA. How can doctors ensure that this threat is minimised? (2 marks)

Doctors can ensure that there is a reduced number of antiobiotics prescribed for patients. They can also make sure that patients are fully evaluated so as to stop the prescription of antibiotics for viral...

AT
Answered by Alex T. Biology tutor
2319 Views

What is the refractory period of a nerve action potential?

The refractory period is composed of two parts. The first part is the absolute refractory period in which another action potential cannot be stimulated in the nerve. In the relative refractory period that...

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Answered by Karthik K. Biology tutor
11052 Views

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