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INTERACTIVE MULTIPLE CHOICE QUESTIONS Test 3

INTERACTIVE MULTIPLE CHOICE QUESTIONS Test 3. The answers are provided, but so also are explanations of why the alternatives are unsatisfactory.

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INTERACTIVE MULTIPLE CHOICE QUESTIONS Test 3

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  1. INTERACTIVE MULTIPLE CHOICE QUESTIONS Test 3 The answers are provided, but so also are explanations of why the alternatives are unsatisfactory

  2. These multiple choice questions are similar to the ones set by the GCSE and IGCSE Examination Boards except that, in some cases, there may be more than one acceptable answer. For this reason, even if you select a correct answer at your first attempt, it is worth looking at all the alternatives (a) to see if there is a better answer and (b) to see why some of the alternatives are unacceptable Question 1

  3. Question 1 (a) feed the wheat to the hens, eat the eggs they lay and then kill and eat the hens (b) share the wheat with the hens, eat the eggs and then eat the hens (c) eat the hens and then eat the wheat (d) eat all the wheat and then kill and eat the hens Question 2 You are shipwrecked on a barren island but you have rescued three hens and a bag of wheat from the ship. Your best survival strategy is to …

  4. No All the time the hens are alive they will be using their food to produce energy as well as eggs. This energy will not be available to you, so you are losing out on the potential value of the food available

  5. No All the time the hens are alive they will be using their food to produce energy as well as eggs. This energy will not be available to you, so you are losing out on the potential value of the food available

  6. Yes All the time the hens are alive they will be using their food to produce energy as well as eggs. This energy will not be available to you, so your best strategy will be to kill and eat the hens as soon as possible

  7. No All the time the hens are alive they will be using their food to produce energy as well as eggs. This energy will not be available to you, so you are losing out on the potential value of the food available

  8. Question 2 (a) produce more urine at a greater concentration (b) produce less urine at a weaker concentration (c) produce less urine at a stronger concentration (d) Urine production is not affected by hot weather Question 3 Humans in hot weather …

  9. No In hot weather, more water is lost by evaporation (e.g. sweating) and so a smaller volume of urine is produced

  10. No In hot weather, more water is lost by evaporation (e.g. sweating) and so a smaller volume of urine is produced but it will be of a higher concentration

  11. Yes In hot weather, more water is lost by evaporation (e.g. sweating) and so a smaller volume of urine is produced. It will also have a higher concentration

  12. No In hot weather there is a reduced volume of urine and at a higher concentration because water is lost by evaporation, leaving less to be excreted by the kidneys

  13. Question 3 (a) a nematode (b) an annelid (c) a millipede (d) a mollusc Question 4 This animal is classified as …

  14. No Nematode worms are not segmented

  15. Yes The drawing is of a segmented worm called Nereis (ragworm)

  16. No The drawing bears a superficial resemblance to a millipede but there are no jointed legs

  17. No Molluscs are not segmented

  18. Question 4 (a) less oxygen, more carbon dioxide and more water vapour (b) less carbon dioxide, more oxygen and more water vapour (c) less oxygen, more carbon dioxide and less water vapour (d) more carbon dioxide, less oxygen and more nitrogen Question 5 Compared with the air breathed in, the air leaving the lungs will have …

  19. Yes Gaseous exchange in the alveoli results in oxygen being absorbed and carbon dioxide being given out. Also, evaporation from the lining of the alveoli results in an increase in the water vapour breathed out.

  20. No Gaseous exchange in the alveoli results in oxygen being absorbed and carbon dioxide being given out.

  21. No It is correct that gaseous exchange in the alveoli results in oxygen being absorbed and carbon dioxide being given out. However, evaporation from the lining of the alveoli results in an increase in the water vapour breathed out.

  22. No Although air contains 79% nitrogen, it is an inert gas and does not play a part in respiration, so the nitrogen content of the air breathed in and out does not change

  23. Question 5 (a) a flexor muscle (b) an extensor muscle (c) a voluntary muscle (d) antagonistic to the triceps muscle Question 6 The biceps muscle is …

  24. Yes When the biceps muscle contracts, it flexes the arm at the elbow

  25. No The extensor muscle is the triceps. It extends (straightens) the arm at the elbow

  26. Yes The biceps is a voluntary muscle which responds to nervous impulses from the brain.

  27. Yes The action of the muscles have opposite effects. The biceps flexes the arm at the elbow and the triceps extends the arm

  28. Question 6 (a) C2H5OH (alcohol) (b) C3H6O3 (lactic acid (c) 6CO2 (carbon dioxide) (d) CH3OH (methanol) Question 7 What is missing from this equation which represents one form of respiration ? C6H12O6 + 6O2 ………… + 6H2O

  29. No C2H5OH (alcohol) is a product of anaerobic respiration (fermentation). The presence of 6O2 in the equation shows that this is aerobic respiration

  30. No C3H6O3 (lactic acid) is a product of anaerobic respiration in muscle. The presence of 6O2 in the equation shows that this is aerobic respiration

  31. Yes The presence of 6O2 in the equation shows that this is aerobic respiration and the glucose (C6H12O6) will be completely oxidised to carbon dioxide (6CO2) and water (6H2O)

  32. No CH3OH (methanol) plays no part in respiration

  33. Question 7 (a) the ciliary muscle contracts (b) the ciliary muscle relaxes (c) the lens becomes thicker at the middle (d) the lens becomes thinner at the middle Question 8 When the eye accommodates to focus on a distant object …

  34. ciliary muscle light from nearby object No When the ciliary muscle contracts it reduces the tension in the suspensory ligament and allows the lens to become thicker in the middle. This is accommodation for close objects

  35. ciliary muscle light from distant object Yes When the ciliary muscle relaxes it allow the fluid pressure in the eye to pull the lens to a thinner shape. This is accommodation to focus distant objects light from distant object

  36. No A lens which is thick in the middle has a shorter focal length and will focus close objects (see answer(a))

  37. Yes A thinner lens has a longer focal length and will focus distant objects (see answer (b))

  38. Question 8 (a) Fish and chips (b) Pizza and salad (c) Sausage and mash with runner beans (d) A cheese sandwich Question 9 Which of the following would make the best contribution to a balanced diet?

  39. Not the best The fish provides protein and the chips provide carbohydrate. The cooking oil supplies fats. But there is very little content of vitamins or dietary fibre

  40. Not the best The green salad will provide some vitamins and dietary fibre but the pizza is largely carbohydrate, though the topping may contain a small amount of protein

  41. This is the best The sausage will provide protein and fats; the mashed potatoes will be largely carbohydrate and the runner beans will contain dietary fibre and vitamins A and C

  42. Not the best The cheese will contain protein, fat and vitamin A. The bread will be largely carbohydrate. Unless the bread is wholemeal there will be little dietary fibre. The vitamins found in green vegetables, particularly vitamins A and C will not be present in sufficient amounts

  43. Question 9 (a) calcium ions (b) phosphate ions (c) potassium ions (d) magnesium ions Question 10 In order to make chlorophyll a green plant specifically needs a supply of …

  44. No Plants do need calcium ions for building cell walls, for example. But they do not need them specifically for making chlorophyll

  45. No Plants need phosphate ions for making DNA, for example, and for many chemical processes. But they do not need phosphates specifically for making chlorophyll

  46. No Plants need potassium for root development and flower formation but not specifically for producing chlorophyll

  47. Yes Magnesium is an essential part of the chlorophyll molecule

  48. Question 10 (a) Sieve tubes in the phloem (b) Leaves (c) Potato tubers (d) Xylem vessels Question 11 Which of the following can be described as either a source or a sink?

  49. No Sieve tubes in the phloem carry food from one part of the plant to another (from sources to sinks) but they themselves are not sources or sinks

  50. Yes Leaves produce food by photosynthesis which is then transported in the sieve tubes to other parts of the plant. The leaves, therefore, are SOURCES

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