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Biology Revision Questions:
What are the parts of a plant cell?
Cell wall, Cell membrane, chloroplasts, ribosomes, nucleus, cytoplasm, permanent vacuole.

What are the parts of a human cell?
Cell membrane, nucleus, cytoplasm, ribosome, mitochondria.

What is the job of the root hair cell and how is it specialised?

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The diffusion of water particles from a dilute solution to a concentrated solution through a partially
permeable membrane.

What happens to an animal cell when osmosis occurs?
Water diffused into the cell, which bursts and dies, water moves out of the cell so the cell shrinks.

What happens to a…

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What is biomass?
The mass of living material.

How is energy lost along the food chain?
The producers only absorb little of the suns energy, and little of that is eaten by the consumer and so
on. Movement, excretions, heat energy.

What are the best conditions for decay?
Warm, moist,…

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Where is lipase made?
Pancreas and small intestine.

Where is amylase made?
Salivary glands, pancreas and small intestine.
What is the function of bile?
It neutralises excess stomach acid, to produce alkaline conditions which the enzymes in the small
intestine work best. It emulsifies (breaks down) fats to increase their…

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What is gas exchange?
Lungs have thin walls with a large surface area so gas carbon dioxide diffused from the blood into the
alveoli while oxygen diffuses in the opposite direction.

What happens to the lungs when we breathe in?
Inspirations ­ the intercostal muscles contract moving the ribcage up,…

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How many chromosomes are there in a sex cell?

Why do the sex cells only have 23 chromosomes?
So that the embryo will get 23 chromosomes from each parent making it 23.

What does haploid and diploid mean?
Haploid means half of the number of chromosomes, diploid means double…




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