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Daily Practice · GCSE Science

January 1991 5-a-day

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January 1991

31 sheets · 155 questions · GCSE

January 1991 compilationAll answers

Every sheet in January 1991

The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.

  1. 1st January 1991Where is the DNA found in a bacterial cell?
  2. 2nd January 1991Name the substance in red blood cells that binds oxygen.
  3. 3rd January 1991State three factors that can limit the rate of photosynthesis.
  4. 4th January 1991Explain why type 1 diabetes is treated with insulin injections rather than tablets.
  5. 5th January 1991In a grassland food chain, the biomass of grass available is 8400 kg and the biomass transferred to the rabbits that eat it is 940 kg. Calculate the percentage efficiency of biomass transfer from grass to rabbits, to 3 significant figures.
  6. 6th January 1991Explain, in terms of particle size, how reverse osmosis separates water from dissolved salt.
  7. 7th January 1991Give the charge on an ion formed by a group 2 element.
  8. 8th January 1991Explain why aluminium cannot be extracted from aluminium oxide by heating with carbon.
  9. 9th January 1991State one factor that affects the size of the voltage produced by a chemical cell.
  10. 10th January 1991Name the alkene with the molecular formula C4H8.
  11. 11th January 1991Name three greenhouse gases.
  12. 12th January 1991A kettle transfers 360000 J of energy in 150 s. Calculate its power in watts.
  13. 13th January 1991Why is the live wire dangerous even when a device is switched off?
  14. 14th January 1991Describe the plum pudding model.
  15. 15th January 1991A spanner is used to loosen a bolt. Explain why using a longer spanner makes it easier to loosen the bolt.
  16. 16th January 1991State two ways of increasing the force produced by a motor effect setup, for a wire of fixed length at a fixed angle to the field.
  17. 17th January 1991Name the apparatus used to estimate the population of a slow-moving or non-moving species in a field.
  18. 18th January 1991Name the plant tissue that transports water and dissolved minerals from the roots to the leaves.
  19. 19th January 1991Define a communicable disease.
  20. 20th January 1991Name the hormone released when blood glucose concentration is too high, and state its overall effect.
  21. 21st January 1991Define mutation.
  22. 22nd January 1991Explain, in terms of electrons, why reactivity decreases going down Group 7.
  23. 23rd January 1991Explain why potassium is more reactive than sodium.
  24. 24th January 1991Calculate the number of moles in 88 g of carbon dioxide. (Mr = 44)
  25. 25th January 1991Explain, in terms of bonds, why breaking bonds is an endothermic process.
  26. 26th January 1991The forward reaction of a particular reversible reaction is exothermic. State whether the reverse reaction is exothermic or endothermic.
  27. 27th January 1991A solution gives a cream precipitate when acidified with dilute nitric acid and then treated with silver nitrate solution. Name the halide ion present.
  28. 28th January 1991A device transfers 4500 J in 90 s. Calculate its power.
  29. 29th January 1991In a series circuit, the current through one lamp is 0.30 A. State the current through a second lamp in the same circuit.
  30. 30th January 1991Why does a bicycle pump get warm when used?
  31. 31st January 1991State what the gradient of a distance-time graph represents.