Top answers

Biology
A Level

Briefly describe the environmental effects of nitrogen fertilisers in a body of water

The nitrogen fertiliser would leach into the water. This would cause algae to grow exponentially on the surface of the water, therefore would reduce the amount of...

HB
Answered by Holly B. Biology tutor
3218 Views

How are coenzymes used in the process of aerobic respiration?

Coenzymes contrary to their name aren't enzymes but are synthesised from vitamins. Their overall purpose is to bind to the active site of a specific enzyme to aid the binding of the complemenatry substrat...

SP
Answered by Sophie P. Biology tutor
21271 Views

State the difference between Apoplastic and symplastic pathways of water movement in plants

•Apoplastic- in cell wall and water moves by cohesion.

•Symplastic- in cytoplasm and water moves by osmosis.

EB
Answered by Ethan B. Biology tutor
9043 Views

Describe the roles of calcium ions and ATP in the contraction of a myofibril (5 marks)

Calcium ions, which diffuse in from the sarcoplasmic reticulum, cause tropomyosin to shift which reveals the myosin binding site located on the actin filament allowing the myosin head to bind. A molecule ...

MY
Answered by Molly Y. Biology tutor
12790 Views

What part do the kidneys play in homeostasis?

The kidneys can be split into 5 main sections. Firstly we have the glomerulus. Blood enters the kidneys via the afferent arteriole and then travels to the glomerulus which is just a cluster of capillaries...

NA
Answered by Nicole A. Biology tutor
4248 Views

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