science revision cards

this is the basics for biology b2

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what are specialised cells??

cells which have individual jobs in each part of the body/plant.

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what do animal cells have??

  • Nucleus
  • Cytoplasm
  • Cell Membrance
  • Mitochondria
  • Ribosomes
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making proteins

proteins are made by ribosomes

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what do plant cells have??

plant cells have evrything animal cells have +

a cellulose cell wall, permanent vacuole and cholrophyll.

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what is diffusion in cells??

diffusion in cells is where an oxygen molecule goes through a cell so it can respire.

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what are enzymes??

enzymes are a biological catalyst used for breaking down protein in our bodies.

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what are chromosomes??

chromosomes are in Dna which makes up me and you, they from both your parents and there are 23 pairs of them.

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where are enzymes made??

  • stomach
  • mouth
  • intestines
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what is osmosis??

osmosis is the movement of water molecules across a partially permeable membrane from a region of higher water concentration to an area of lower concentration.

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what is diffusion??

diffusion is the passive movement  from an area of higher cocentration to an area of lower concentration.

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what is the best temperature for enzymes??

the best temperature for enzymes is 37c.

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what is the optimum PH for enzymes??

Ph7 unless it's pepsin which is PH2.

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