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Biology
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Use your knowledge of the movement of water to explain why honey has antibacterial properties

Honey has a lower water potential than the water inside bacterial cells due to its high ionic content.Water moves by osmosis from areas of higher water potential to areas of lower water pote...

Answered by Sanskriti S. Biology tutor
2757 Views

Describe mechanisms used by the body to prevent entry of pathogens

Mucous in the trachea traps pathogens Microorganisms in food are killed by stomach acidThe skin forms a physical barrier against pathogens

Answered by Obioma N. Biology tutor
1961 Views

Describe the differences between noncompetitive and competitive inhibition of enzymes.

The key differences here are where the inhibitor binds to the enzyme, competitive bind to the active site and as such compete directly with the normal substrate of the enzyme. Noncompetitive bind to a sit...

Answered by Thomas B. Biology tutor
2104 Views

The MMR vaccine gives protection against measles, mumps and rubella. How? (4 marks)

. Vaccine contains antigens from the pathogens . This is recognised by helper T cells which activates other helper T cells and B cells . B cells undergo clonal selection and produce memory + plasma cells ...

Answered by Mohit V. Biology tutor
2587 Views

Describe the differences and similarities between diffusion and osmosis.

Diffusion and osmosis both describe the net movement of molecules down a concentration gradient, resulting in an even spread of the molecule over an area over time. Osmosis, however, is more specific as i...

Answered by Patrick S. Biology tutor
3168 Views

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