Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Cell Structures And Function Of Organelles CHAPTER 2: CELL STRUCTURES AND FUNCTION OF ORGANELLES MULTIPLE CHOICE QUESTIONS 1. What is the function of the nucleolus? A. Formation of mRNA B. Formation of ribosomes C. Formation of spindle fibres D. Formation of the secretory vesicles 2. An organelle associated with carbohydrate synthesis is the: A. Centriole B. Ribosome C. Nucleolus D. Golgi apparatus 3. The main function of Golgi apparatus is to A. synthesize polypeptide. B. synthesize and transport lipids. C. remove toxin substance or detoxification. D. modify substances that will be excreted outside of the cells. 4. Figure 1 below shows the sequence of two functions of lysosome in a cell: Figure 1 What structure do I, II, III and IV represent ? I A. Autophagic vacuole II III Primary Phagocytic lysosome vacuole IV Secondary lysosome B. Phagocytic vacuole Primary lysosome Autophagic vacuole C. Primary lysosome Secondary Phagocytic lysosome vacuole Autophagic vacuole D. Secondary lysosome Primary lysosome Phagocytic vacuole Secondary lysosome Autophagic vacuole 8 Cell Structures And Function Of Organelles 5. Ribosomes are the sites for A. photosynthesis. B. lipid synthesis. C. protein synthesis. D. aerobic respiration. 6. Which the following pair about a cell and its structure is not true A. Cheek cells -centriole B. Neuron –neurontransmitter vesicle C. Plant epidermal cell – chloroplast D. Parenchyma cell – vacuole 7. Which of the following correctly matches an organelle with its function? A. central vacuole . . . storage B. nucleus . . . cellular respiration C. mitochondrion . . . photosynthesis D. ribosome . . . manufacture of lipids 8. What is the function of a plant cell vacuole? A. Storage of wastes B. Support of the cell C. Excretion of wastes D. Both A and B are correct. 9. Which organelle does one expect to be most abundant in human skeletal muscle cells? A. Lysosomes B. Mitochondria. C. Golgi apparatus. D. Smooth endoplasmic reticulum. 10. Mitochondria and chloroplast share several common features, for example; A. both are capable of semiautonomous growth and reproduction. B. neither are components of the endomembrane system C. each contains a small amount of DNA. D. all of the above. 11. Centriole play important roles in A. division of plant cell only. B. motility of reproductive cells. C. development of Golgi apparatus. D. development of cilia and flagella. 12. When a plant cell is placed in a concentrated sugar solution, it undergoes A. turgor C. hemolysis B. crenation D. plasmolysis 9 Cell Structures And Function Of Organelles 13. Four groups of onion cells have been placed in four solutions with different water potential. Which group of cells has a water potential more negative than the surrounding solution at the beginning of the experiment? A. . C. B. . D. . 14. Four group of onion cells, each with water potential ( ψ ) of -400kPa, are placed in four solutions W, X, Y, and Z with different water potential. In which solution is there a net movement of water into the cells by osmosis? A B C D Water potential ψ (kPa) -200 -400 -600 -800 Solution W X Y Z 15. Figure 2 shows the sequence of movement of a molecule across the membrane. Outside Inside Inside Outside Figure 2 The movement of the molecule in the diagram is called A. phagocytosis B. pinocytosis C. diffusion D. facilitated diffusion 10 Cell Structures And Function Of Organelles 16. Which of the following involves facilitated diffusion? i. Transportation of glucose into the cell. ii. Movement of oxygen and carbon dioxide across the alveolus membrane. iii. Diffusion of ATP from the mitochondrion. iv. Movement of sodium ions across the axon membrane during action potential A. i, ii and iii B. i ,ii and iv C. i, iii and iv D. ii, iii and iv 17. The mechanism where protein molecules and polysaccharides enter the cell membrane. A. Diffusion C. Active transport B. Facilitated diffusion D. Endocytosis 18. Which of the following are examples of phagocytosis? i. Amoeba capturing its prey by extending pseudopodia around it. ii. Fluid and dissolved solutes flow into vesicles in the cell. iii. Neutrophil engulfing bacteria. iv. A vesicle is formed that carries the cholesterol molecule into the cell. A.i only B.i and iii C. ii only D. ii and iv STRUCTURED QUESTIONS 1. Figure 3 below shows the structure of animal cell as seen using an electron microscope. J A C B E F D Figure 3 11 Cell Structures And Function Of Organelles a). Name the parts labelled A, B,C ,D,E and F. A: ______________________________________________ B: ______________________________________________ C: ______________________________________________ D: ______________________________________________ E: ______________________________________________ F: ______________________________________________ [6 marks] b) Give ONE of the function the labeled structures B : ____________________________________________________________ D : ____________________________________________________________ E : ____________________________________________________________ J : ____________________________________________________________ [4 marks] 2. Figure 4 below show three types of organelles. Organell X Organelle Y Figure 4 Organelle Z a) State where these cells may have been taken from __________ [1 mark] b) From the diagrams above, name the structures labelled P, Q and R P: _________________________ Q: _________________________ R: _________________________ [3 marks] c) Give one function of organelle Y _______________________________________________________________ [1 mark] 12 Cell Structures And Function Of Organelles d) Give one common function of organelle X and Z _______________________________________________________________ [1 mark] e) Most organelles in eukaryotes are surrounded by membrane. From Figure 4, which organelle(s) is (are) surraounded by: i. ii. Single membrane: ________________ Double membrane: _______________ [2 marks] 3. Figure 5 shows a model of plasma membrane structure introduced by S.Singer and G. Nicholson. B C D X A Y Figure 5 a) Give the name of the model in the Figure 5.. _______________________________________________________________ [1 mark] b) Suggest why this model is known as in 3 (a). _______________________________________________________________ _______________________________________________________________ [2 marks] c) Name the structures labelled A to D. A: ______________________ B: ______________________ C: _____________________ D: _____________________ [4 marks] d) On which side of the membrane X or Y, is the cytoplasm of the cell? ______________________________________________________________ [1 mark] 13 Cell Structures And Function Of Organelles e) Give TWO functions of protein molecules in the cell membrane. _______________________________________________________________ _______________________________________________________________ [2 marks] 4. Figure 6 shows certain activity takes places in an animal cell. A D C B H G F E Figure 6 a) Name the process A ,B, C and D and the structure E, F,G and H A: __________________________________________ B: __________________________________________ C: __________________________________________ D: __________________________________________ E: __________________________________________ F: __________________________________________ G: __________________________________________ H: __________________________________________ [4 marks] b) Name the suitable title for the above diagram. _______________________________________________________________ [1 mark] c) Name the organelle that produces G _______________________________________________________________ [1 mark] 14 Cell Structures And Function Of Organelles d) State another function of organelle G, beside the above process _______________________________________________________________ _______________________________________________________________ [2 marks] e) State TWO main function of organelle E _______________________________________________________________ _______________________________________________________________ [2 marks] 5. Figure 7 shows a plant cell immersed in a sucrose solution. The pressure potential (ψ p ) and the solute potential (ψ s ) of the cell and of the sucrose solution are shown in Figure 7. p = 340 kPa s (cell) = -750 kPa Plant cell s sucrose solution = -1400kPa Figure 7 a) Define osmosis in terms of water potential. _______________________________________________________________ _______________________________________________________________ [2 marks] b) i. Calculate the water potential of this cell. Show your calculation. ____________________________________________________________ ____________________________________________________________ [3 marks] ii. State whether water will move in or out of the cell. ____________________________________________________________ [1 mark] c) What happen to the volume of the cell? Explain. _______________________________________________________________ _______________________________________________________________ [2 marks] 15 Cell Structures And Function Of Organelles d) State TWO differences between passive transport and active transport. _______________________________________________________________ _______________________________________________________________ [2 marks] ESSAY QUESTIONS 1. a) Briefly describe the structure and functions of the component of the cell below: i. Plant vacuole, ii. Nucleolus iii. Ribosome. [10 marks] b) Explain briefly the various transport mechanism of molecules across membranes [10 marks] 2. a) Explain briefly on lysosome and its roles. [8 marks] b) With reference to a labeled diagram, describe the structure of cell membrane using Fluid Mosaic Model. [12 marks] 16