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6. Why do we stain onion cells before observing them?

  • To make it easier to see because the layers of the onion are see-through
  • So that they don't die
  • To contrast the onion layers with the chloroplasts

7. Which microscope can be used to see sub-cellular structures?

  • Light
  • Electron
  • Optical
  • Resolving

8. What is magnification?

  • The ability to produce an image that shows fine detail clearly
  • The number of times greater an image of an object is than the actual object
  • How detailed an enlarged image is

9. Is mitochondria a sub-cellular structure?

  • Yes
  • No

10. What does the cytoplasm do?

  • It is where energy release happens
  • It is where most chemical reactions happen
  • It controls the passage of substances into and out of the cell
  • It is where protein synthesis happens

11. What does the nucleus do?

  • It contains DNA and enzymes
  • It controls the activity of the cell
  • It controls the protein synthesis of the cell
  • It controls the energy release of the cell

12. Why do onion calls not have chloroplasts?

  • Because onions are grown underground, so there would be no point because without light it can't photosynthesize
  • Because they are toxic for us to eat
  • Because they can't get light through the onion skin

13. What are eukaryotic cells?

  • Cells with genetic material enclosed in a nucleus
  • Animal and plant cells
  • Cells without genetic material enclosed in a nucleus
  • Bacteria

14. Which microscope has a higher magnification and a higher resolving power?

  • Resolving
  • Optical
  • Electron
  • Light

15. What are the two types of microscope?

  • Light and Resolving
  • Optical and Resolving
  • Optical and Electron
  • Light and Electron

16. Is it better to have a higher magnification or a lower magnification to study cells in finer detail?

  • higher
  • lower

17. What are the 8 things in a plant cell?

  • nucleus, mitochondria, cell membrane, cytoplasm, ribosomes, a cell wall, chloroplasts, a permanent vacuole
  • nucleus, mitochondria, cell membrane, cytoplasm, chlorophyll, a cell wall, chloroplasts, a permanent vacuole
  • nucleus, mitochondria, cell membrane, cytoplasm, ribosomes, a cell wall, chloroplasts, genetic material
  • nucleus, enzymes, cell membrane, cytoplasm, ribosomes, a cell wall, chloroplasts, a permanent vacuole

18. When observing an onion, what is the name of the piece of glass we put on top of the onion?

  • A microscope slide
  • A cover slip
  • A lens

19. What do chloroplasts do?

  • It is where protein synthesis happens
  • It contains DNA and enzymes
  • They absorb light energy to make food
  • They produce enzymes

20. What do the mitochondria do?

  • It is the site of aerobic respiration - the release of energy
  • It is the site of protein synthesis
  • It is the site of breathing
  • It is the site of anaerobic respiration - the release of energy