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Biology
GCSE

What is osmosis?

Osmosis is the passive movement of a solvent, for example water, through a semipermeable membrane, such as one of a living cell, into a solution of higher solute concentration than the starting solute con...

SM
Answered by Sophie M. Biology tutor
2822 Views

TMV can cause plants to produce less chlorophyll. This causes leaf discoloration. Explain why plants with TMV have stunted growth.

Chlorophyll is a pigment molecule produced by plants that they use to absorb light energy (photons), which is needed for the light dependent section of photosynthesis. Photosynthesis makes glucose, the en...

DV
Answered by Dominic V. Biology tutor
3081 Views

Describe and explain how blood glucose levels are controlled following a meal.

Following a meal, the levels of glucose in the blood will increase. This increase in the level of glucose needs to be controlled, otherwise the levels of glucose will become too high and someone could end...

DU
Answered by Dr Usama A. Biology tutor
2876 Views

Explain why the rate of reaction slows down above the enzyme's optimum temperature.

Chemical reactions occur faster at higher temperatures since at higher temperatures the enzyme is more likely to bump into the substrate more often and with a higher energy than at a lower temperature. Th...

YI
Answered by Yasmin I. Biology tutor
20690 Views

Describe the similarities and differences between the processes of osmosis and diffusion

Similarities:Both processes are passive (do not require energy)In both processes molecules move from an area of high concentration to low concentration and therefore down a concentration gradient.Differen...

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Answered by Grace H. Biology tutor
7830 Views

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