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Biology
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Compare anaerobic respiration in a yeast cell with aerobic respiration in a muscle cell (3 marks)

yeast cells produce ethanol whereas muscle cells produce lactic acid as a by-product yeast cells produce CO2, muscle cells do not they both produce small amounts of energy

Answered by Cat F. Biology tutor
2984 Views

How does the hormone ADH help the kidneys regulate the water content of blood?

ADH is produced by the pituitary gland located in the brain. When the water content of blood is low, more ADH is released from the pituitary gland into the blood. When it reaches the kidneys, it causes th...

Answered by Gabriella Z. Biology tutor
3004 Views

Describe and explain how the eye would focus on a near object. [5]

As light passes through the cornea and lens, refraction takes place at varying degrees depending on lens shape. Objects closer to the eye have diverging light rays, thus need more refraction from the lens...

Answered by Saoirse E. Biology tutor
23830 Views

How does phagocytosis work?

The phagocyte will be attracted to a pathogen and move to it via chemotaxis. The phagocyte then engulfs the pathogen. Once the pathogen is inside the phagocyte, it is enclosed in a phagosome (essentially ...

Answered by Catherine W. Biology tutor
2116 Views

Why is the tertiary structure of an enzyme essential to its function?

Firstly, explain what tertiary structure means - the overall 3D structure of a polypeptide chain
This 3D shape is essential to enzyme function (aka catalysing biological reactions), as this shape w...

Answered by Olivia C. Biology tutor
4831 Views

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