May/June 2011

Q1. The diagram shows a plant cell.

Which features are not found in animal cells?

Q2. Below is a series of cell processes.

1. mineral ions entering root hair cells
2. glucose uptake by villus cells
3. water entering root hair cells
Which of these involve active transport?

Q3. The sentence describes the uptake of water by a plant.
Water moves into the root hairs of a plant by osmosis through a ……1…… permeable cell
membrane, ……2…… a water potential gradient.
Which words correctly complete gaps 1 and 2?

Q4. Magnesium is an essential element for

Q5. A dish is filled with agar jelly containing starch. Four holes are cut in the jelly and each hole is filled as shown. After 30 minutes, which hole will be surrounded by the largest area without starch?

Q6. The graph shows the effect of carbon dioxide (CO2) concentration on the rate of photosynthesis.

What could be limiting the rate of photosynthesis at points X and Y?

Q7. The diagram shows a green shoot photosynthesizing under a glass jar. This was used as a
control experiment in a laboratory investigation.

Which diagram shows the other experiment that should be done to investigate the need for
carbon dioxide in photosynthesis?

Q8. A protein solution is tested using three different reagents. Which set of results is obtained?

Q9. What are the advantages of chewing food at the start of digestion?

Q10. Which row correctly gives a good source of vitamin C and its deficiency symptom?

Q11. The photomicrograph shows part of a sunflower stem.

Which tissue transports water and mineral salts and which tissue transports sucrose?

Q12. A herbaceous plant, growing in a nutrient solution, is placed in a well-lit experimental chamber Through which humid air is being passed slowly. The diagram below shows a section through a part of the plant.

The speeds of movement of the fluids in tissues P and Q are measured. The humid air is then replaced by dry air and the speeds of movement of the fluids change. What are these changes?

Q13. The table shows the characteristics of the blood in one blood vessel in the body.

Which blood vessel contains blood with these characteristics?

Q14. How do veins differ from arteries?

Q15. The diagram shows a section through the human heart.

What happens as blood is being pumped out of the heart?

Q16. An experiment is set up as shown.

After four hours, the coloured water will

Q17.Which process does not depend on respiration?

Q18. What happens to the diaphragm when breathing in?

Q19. The diagram refers to the control of water concentration in the blood.

Why is this a negative feedback system?

Q20. What is not an excretory product of mammals?

Q21. What is the correct sequence of the bones in the arm of a mammal, from the hand to the
shoulder?

Q22. What decreases as a result of adrenaline secretion?

Q23. What are the functions of the relay, motor and sensory neurones in a reflex response?

Q24. The diagram represents a section through the brain and part of the spinal cord. Which part of the brain controls balance?

Q25. Using the flow diagram, which organism is a fungus?

Q26. The graph shows the relationship between the average age at death and the number of cigarettes smoked per day.

Which conclusion from the graph is correct?

Q27. On decomposition, which substance in decaying plants is the major source of carbon for carbon dioxide production by the micro-organisms involved?

Q28. The diagram shows a fermenter used to produce penicillin.

Why is air pumped into the fermenter?

Q29. The diagram shows part of the nitrogen cycle.

Which substance at X forms part of this cycle?

Q30. Three statements about malarial parasites are listed.
1. Insecticides are used to kill the vectors.
2. Netting is used to keep the vectors away from people.
3. People take drugs that stop the malarial pathogen developing.
Which of these methods can be used to control malaria?

Q31. The diagram shows part of a food web.

How many herbivores are shown?

Q32. Which statement correctly describes advantages or disadvantages of self-pollination to a plant?

Q33. The diagram shows part of a flower at the time of pollination.

How does the male gamete reach the female gamete?

Q34. If high levels of nitrates are washed into rivers, the following changes may occur, causing fish to die.
1. Water plants die and fall to the bottom.
2. Bacteria multiply rapidly.
3. Concentration of oxygen in the water decreases.
4. Increased growth of single-celled water plants makes the water green.
In which order do these changes take place?

Q35. Which disease can be cured by antibiotics?

Q36. The diagram shows a side view of the female reproductive system.

In which region are sperms released during sexual intercourse and where does fertilizations
usually take place?

Q37. A man is blood group A and his wife is blood group AB. What are the possible blood groups of their children?

Q38. Flower colour is controlled by a single pair of alleles. The allele for red flowers is dominant to the allele for white flowers.
A plant homozygous for red flowers is crossed with a plant homozygous for white flowers. All the resulting plants have red flowers (F1 generation).
When the F1 generation are crossed with each other, 18 plants are obtained. 12 plants have red flowers and 6 have white flowers (F2 generation).
What ratio is expected in the F2 generation and what ratio has been obtained?

Q39.In the commercial manufacture of insulin, a human gene is inserted into which of these?

Q40. Which of these may be heterozygous?