Yuen Long Public Secondary School

Biology Class Work Suggested Answer

 

 1      

            a          A: nucleus                                 1m

                        B: cell membrane                       1m

                        C: cytoplasm                            1m

                        D: mitochondrion                        1m

                        E: cell wall                                1m

                        F: chloroplast                            1m

            b          B, C and D                                2m or 0m

            c          Vacuole OR solid granules                                                          1m

                        Vacuole: supports the plant when it is full of water                        1m

                        OR solid granules: hold useful substances or wastes

 2      

            a          Nucleus                                                                                                1m

                        Controls all cellular activities and carries genetic materials                        1m

                        Mitochondrion                                                                                        1m

                        Site where the energy-releasing stage of cell respiration takes place          1m

                        Chloroplast                                                                                            1m

                        Site of photosynthesis                                                                            1m

                        Vacuole                                                                                                1m

                        Storage of various substances                                                                 1m

            b          Plant cells store starch but animal cells store glycogen.                            2m

 

3.                        Under light microscope, plant cell appears as polygonal shape with cell wall. Vacuoles of animal cell are usually small and numerous, but the plant cell’s is large and single. Some food granules may be found in plant cell. For the photosynthetic plant cell, there is green colour chloroplast found.

6m

 

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