Suggested answers for those have tried attempted this paper:
REVIEW OF THE 2009 SPM BIOLOGY PAPER 1
1. P is mitochondrion, Q is Rough endoplasmic reticulum, R is chromosome
Answer : C
2. Organelle that synthesizes protein is ribosome
Answer: B
3. P shown in the structure of plasma membrane is a carrier protein.
Answer: D
4. After one hour, there will be a rise in capillary tube because the water molecules from distilled water which is hypotonic has entered the Visking tubing via osmosis.
Answer: C
5. The process X is osmosis because water molecules from distilled water will diffuse through the egg membrane which is a semi permeable membrane.
Answer: A
6. The type of movement of molecules P is facilitated diffusion because it moves along concentration gradient
Answer: D
7. The correct sequence of the production of the extracellular enzyme is R Q P
Answer: C
8. The Diagram which shows the cell has been immersed in a hypotonic solution is the one which shows the largest vacuole.
Answer: C
9. The process of formation of a disaccharide molecule from two monosaccharide is known as condensation.
Answer: B
10. Hydrolysis of protein is represented by the equation D
Answer: D
11. Diagram which shows cell that is produced by the cell division of mitosis is A
Answer: B
12. The stage of the mitotic cell division is metaphase because the chromosomes are aligned at the equatorial plane.
Answer: D
13. The individuals of P is breast feeding mother, Q is construction worker and R is a clerk. This is because a bar chart shows the highest energy requirement for Q, the second highest for P and the least for R
Answer: B
14. The food in Level 1 in a food guide pyramid for a balanced diet is rice which is a carbohydrate.
Answer: B
15. The most suitable menu for those suffering from night blindness are Q,S and T which includes vitamin A
Answer: A
16. The cells in a leaf which transport organic substances and water are N and M which are phloem and xylem respectively.
Answer: C
17. The process shown in a Diagram is assimilation where glucose and amino acid are transported to the body cell.
Answer: A
18.The labeled part which contains beneficial bacteria is colon.
Answer: D
19. The purpose of plucking the leaves from a seedling before transferring it from the nursery to the orchard is to reduce the rate of transpiration.
Answer: C
20. The rate of heart beat after the boy stops running is indicated by part B because the heart beat is back to the normal.
Answer: B
21. Based on Diagram given, the adaptations of alveolus which increase the rate of gaseous exchange include: located close to blood capillaries and covered by a thin film of moisture
Answer: D
22. The processes which occur in the respiratory system of a mountain climber which has dropped from its normal level so that the level is returned to normal are: breathing and ventilation rate increase and respiratory muscles contract and relax faster.
Answer: C
23. The total amount of energy used by the plant is when it is absorbed by plant, and for growth.
Answer: C
24. An equation for an anerobic respiration is P is Glucose, Q is oxygen, R is carbon dioxide, S is water and T is ATP.
Answer: D
25. The immediate effect of smoking on the respiratory surface is dries up the lining of alveoli
Answer: B
26. The correct sequence about a sampling technique to estimate the population size of garden snails in a habitat is capture a large number of garden snails and mark each shell, release the garden snails in the same habitat, capture at random a number of garden snails and record the number which are marked and calculate the population of the garden snails
Answer: A
27. The abiotic components in an ecosystem are humidity and light intensity
Answer: C
28. The correct sequence refers to the thinning of the ozone layer is : CFC leaks out of air conditioner, Ultra violet rays break down CFC molecules, then chlorine atom breaks down ozone molecule.
Answer: D
29. The environmental phenomenon which show the melting of ice at the poles and an increase in sea level is global warming.
Answer: D
30. The procedure to investigate the level of water pollution in a river is:
Fill the reagent bottles with water samples, use a syringe to add 1 ml of methylene blue solution, place the reagent bottles inside a cupboard, then record the time taken for the methylene blue solution to decolorize.
Answer: A
31. B.O.D. value is high in river X shows that the river is polluted.
Answer: A
32. The labeled vascular tissue in a tree trunk is sieve tube.
Answer: B
33. The formation of oxyhaemoglobin takes place in the lungs and the dissociation of it occurs in body cells.
Answer: A
34. The part in the gills of a fish which has the highest rate of gaseous exchange is the lamellae
Answer: C
35. The systemic circulatory system is when the oxygenated blood flows from left ventricle to the body, then deoxygenated blood flows from body to the right atrium.
Answer: C
36. A complete ring of bark is removed from a stem of a woody plant. After a few months, the leaves start to fall off and finally the plant dies. This is because sugar is not transported to the roots.
Answer: B
37. The curve which shows the concentration of the antibody after the 8th week of an individual who was affected with measles is B
Answer: B
38. Substance which is injected into the body to stimulate the production of antibodies is vaccine
Answer: B
39. Bones that make up the pectoral girdle are clavicle and scapula.
Answer: D
40. Substances which moves across synapse is neurotransmitter
Answer: D
41. Structure which carries the impulses towards the spinal cord is afferent neurone
Answer: A
42. Based on graph showing changes in the blood glucose level, the true statement is hormone X which is insulin lower the blood glucose level
Answer: A
43. Part of the brain which controls the breathing process is medula oblongata
Answer: D
44. The formation of female gametes is known as oogenesis
Answer: B
45. In spermatogenesis, the groups of cells which have a haploid number of chromosome is secondary spermatocyte and spermatids.
Answer: D
46. In the development of a follicle in an ovary, the structure which involve in secreting progesterone is corpus luteum.
Answer: C
47. A wife has difficulty in ovulating. The hormone treatment which is the most suitable to help the wife to ovulate is Luteinizing hormone.
Answer: B
48. A boy has blood group A and his sister has blood group B. The correct combination of genotypes belonging to their parents are father: AB, mother: AB
Answer: A
49. After 15 days the Graafian follicle will develop into a corpus luteum.
Answer: C
50. The process of separation of sister chromatids does not cause variation.
Answer: C
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