Top answers

Biology
A Level

suggest and explain two ways the cell-surface membranes of the cells lining of the uterus may be adapted to allow rapid transport of nutrients

The membrane is folded therefore has a larger surface area for transport of nutrients by active transport and diffusion. Also, the membrane has a lot of protein carries in the membrane that are used for ...

AS
Answered by Anna S. Biology tutor
10575 Views

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...

SS
Answered by Sanskriti S. Biology tutor
3055 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...

TB
Answered by Thomas B. Biology tutor
2310 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 ...

MV
Answered by Mohit V. Biology tutor
2802 Views

Explain how a change in the primary structure may result in a non functional enzyme

A change in the primary structure means there has been a change in the amino acid sequence.This may cause different hydrogen bonding to occur, leading to a different secondary structure.This may le...

SS
Answered by Sanskriti S. Biology tutor
9146 Views

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