Form 1 December Remedial Biology Questions 2017

FORM 1 DECEMBER REMEDIAL BIOLOGY QUESTIONS 2017 KEENLY REVISE ALL THE COVERED WORK,READ AND MAKE NOTES ON TRANSPORT IN ANIMALS AND ANSWER THE QUESTIONS BELOW.

1. State the functions of the following structures in a mammalian tooth. (3 mks) (a) Pulp cavity (b) Enamel 2. (a) State three adaptations of plants which enables them reduce water loss (3 mks) (b) Suggest two factors that may lead to increased rate of transpiration (2 mks) 3. State the use of the following apparatus in collecting and observing organisms a) Pooter (1 mk) b) Pitfall trap (1 mk) c) Pair of forceps (1 mk) 4. The diameter of the field of view was estimated to be 50mm under a certain magnification. Six cells were observed along the diameter of the field of view. Whatwas the diameter of one cell in microns m  (3MKS) 5. State the importance of the following processes to living organisms a) Locomotion (2 mks) b) Irritability (1 mk) 6. State three adaptations of gills to their function (3 mks) 7. (a) State three properties of a cell membrane (3 mks) (b) Distinguish between osmotic pressure and osmotic potential (2 mks) 8. Give three main functions of water in a living organism (3 mks) 9. a) (i) What is tissue fluid? (2 mks) (ii) State the importance of tissue fluid (2 mks) b) Name the blood vessel with the highest glucose level (1 mk) 10. What are the functions of the dorsal aorta and the venacava? (2 mks) 11. Name the blood vessel: (i) Bearing blood with less oxygen and at the lowest pressure (1 mk) (ii) That link arterioles to venules (1 mk) (iii) State two forms in which carbon (IV) oxide is transported in blood (2 mks) 12. Explain why xylem vessels do not collapse even when they do not contain water(2 mks) 13. Give two reasons why blood pressure is greater in the arteries than in the veins of mammals (2 mks) 14. Explain how the following structural factors affect the rate of transpiration: i) Hairs around the stomata (2 mks) ii) More stomata on upper leaf surface than lower surface (2 mks) 15. State two roles played by osmosis in plants (2 mks) 16. State three functions of Golgi apparatus (3 mks) 17. The diagram below shows a vertical section through a mammalian heart

a) Name the parts labeled A, B and E (3 mks) b) Give a reason why the wall of chamber C is thicker than chamber D (2 mks) 18. The figure below illustrates the blood supply and drainage of the liver 1 a) In which of the blood vessels labeled 1, 2 and 3 would you expect the highest concentration of glucose two hours after eating a starchy meal? Give a reason (2 mks) b) Name one nutrient that is only transported in small quantities in vessel 1 following absorption (1 mk) 19. Name the building blocks of: i) Protein (1 mk) ii) Lipids (1 mk) 20. A teacher set-up the apparatus below to investigate a certain phenomena. The cobalt (II) chloride paper was placed on the upper and lower surfaces of the leaf as shown.

i) What was the aim of the experiment? (1 mk) ii) What observations were made after 2 hours? (2 mks) 21. The diagram below shows how food moves along the human esophagus and intestines

a) Identify the process illustrated in the diagram (1 mk) b) Explain the movement of the food bolus from position E1 to Position E2 (2 mks) c) Name one component of the human diet that assists in the movement in (b) above (1 mk)

22. The table below shows the results of red blood cell counts taken on people living at different altitudes. The cell counts are expressed in terms of blood cells per mm3 of blood.

Altitude (Meters) 995 1995 2995 3995 4995 Red Blood Cells (X106) 6.00 6.60 7.20 8.00 8.80 White Blood Cells (X106) 0.30 0.30 0.30 0.30 0.30 2 a) State the relationship between: i) Red blood cells and the altitude (1 mk) ii) White blood cells and the altitude (1 mk) b) Explain your answer in a) i) above (2 mks) c) State the function of the white blood cells in the body (1 mk) d) Name a metallic element that is necessary for the manufacture of red blood cells (1 mk) e) Name the form in which oxygen is transported in the mammalian body (1 mk) f) Why is carbon (II) oxide considered a respiratory poison? (2 mks) g) Name a vitamin that is essential for the manufacture of red blood cells (1 mk) h) Give two factors that increase the rate of heart beat in humans (2 mks) 23. The diagram below shows part of the alimentary canal of a mammal

i) Name the parts labeled A and C ii) State the function of the part labeled B iii) Name the process by which food moves in the structure labeled A iv) Name the enzymes involved in the digestion of food in the part labeled E above. In each case, give the substrates and the end products formed after digestion of the foods v) Give three functions of the part labelled D

24. The table below is used to check for compatibility of blood before carrying out the transfusion process. Fill in the blanks by indicating a tick (√) if the blood groups are compatible hence no agglutination occurs when transfused or a cross (X) if the blood groups are not compatible hence agglutination occurs (6 mks)

3 Recipient O A B AB O √ √ √ A X √ √ B √ √ Donor AB X √

25. How is the mammalian heart adapted to its functions? Max. 20 mks

2: TRANSPORT IN PLANTS 1. Give three adaptations of the root hair cell 2. Mention and briefly explain the forces that help in condition of water from the root hair cells up the plant 3. a) What is translocation? b) Give three theories that explain the process of translocation c) What is the role of the companion cells on the phloem tissue? 4. Name the process used in uptake of mineral salts in plants 5. Name and briefly explain the structural factors that affect the rate of transpiration 6. How is the arrangement of the vascular bundle in a monocot stem different from that of a dicot stem? 7. Briefly describe how water from soil is absorbed by root hair cells into the xylem tissue of the root 8. The diagram below shows the traverse section of a young stem

A B C D E

a) What are the functions of the structures labeled A, B and C b) What type of cells are found in the parts labelled D? c) Name the tissue labeled E