Year 10 biology assessment Section 1-Cells and Cell Processes 1.1 Characteristics of living things 1. Which characteristic do all living organisms show?( Circle the correct answer) a. b. c. d. Breathing Excretion Photosynthesis Tropism [1] 2. Which is not a characteristic of all living organisms? ( Circle the correct answer) a. b. c. d. Breathing Growth Reproduction Respiration 3. answer) a. b. c. d. [1] Which one of the following best describes the function of a cell membrane? ( Circle the correct It keeps the cell in shape. It controls the substances entering and leaving the cell. It controls the substances entering the cell. It supports the cell structures. [1] 4. Define the term sensitivity. ........................................................................................................................................ ........................................................................................................................................ ................................................................................................................................... [2] [Total 5] 1.2 Cells 5. Fig. 11.1 shows two liver cells, as seen under a light microscope. a. Name the structures labelled A and B. A ............................................................... B ............................................................ [2] b. In Fig. 11.1, the actual height of the cells along the line X–Y is 0.03 mm. Calculate the magnification of the drawing ...........................................................[2] 6. The diagram shows a palisade mesophyll cell. Which structure is not found in an animal cell? ......................................... [1] 7. The diagram shows different types of cells. Which structure do all these cells have? (Circle the correct answer) a. b. c. d. cell membrane cell wall chloroplast nucleus 8. Fig. 3.1 shows images of red blood cells from a human, A, and a bird, B. a. State the function of red blood cells. [1] ................................................................................................................................................... [1] b. There is a nucleus present in each of the red blood cells of the bird, as shown in Fig. 3.1. State the function of a nucleus. ........................................................................................................................................... [1] c. Human red blood cells do not contain a nucleus. State an advantage of this. ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [1] [Total 9] 1.3 Movement in and out of cells 9. a. b. c. Molecules are constantly moving in and out of cells. Which of the following is an example of diffusion? Water moves from a dilute solution in the soil into the cells in plant roots. Saliva flows out of salivary glands into your mouth A spot of blue ink is dropped into a beaker of water and quickly turns it blue [1] 10. What is an example of osmosis? a. b. c. d. Carbon dioxide goes out through the stomata of a leaf. Digested food is absorbed from the small intestine Oxygen goes into the blood from an alveolus. Water enters a plant root from the soil. 11. Some students investigated osmosis in raw potato sticks. a. Define the term osmosis. [1] ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... [2] 12. Using the term water potential, explain why the raw potato sticks: Gained mass when soaked in dilute solutions of sodium chloride ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... lost mass when soaked in concentrated solutions of sodium chloride. ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... [4] [Total 8] 1.4 Enzymes 13. Which graph shows the effect of temperature on the activity of an enzyme? .......................................................... [1] 14. a. b. c. d. What happens to most enzymes above 60°C? They are denatured. They are destroyed by white blood cells. They are digested. They are made more active. [1] 15. Some washing powders contain enzymes that digest fats. These enzymes help to remove greasy stains in clothing. a. The graph in Fig. 5.1 shows the effect of temperature on the activity of two different fatdigesting enzymes from different washing powders. I. State the temperature at which both enzymes are working and have the same activity. temperature ...................................................... °C [1] II. Explain why both enzymes work very slowly at 10 °C. ................................................................................................................................. .................................................................................................................................. .................................................................................................................................. .................................................................................................................................. [2] [Total 5]
