Other questions in this quiz

2. which of the following statements are wrong?

  • the central vacuole of a plant cell contains cell sap which keeps the cell rigid,so plants don't have skeletons
  • chloroplasts allow animal cells to photosynthesize
  • the cell membrane controls what enters or leaves a cell
  • mitochondria are tiny structures where respiration occurs,releasing energy for cell processes

3. What is the difference between a bacterial cell and a plant or animal cell?

  • They have no nucleus
  • They have flagellum
  • They have no cell wall
  • They have two nuclei

4. A fruit is mashed with salty water and detergent. What does this do to the cells of the fruit?

  • They are destroyed completely
  • Nothing
  • They are broken open and nuclei released
  • They are separated individually in the mixture in a solid form

5. which of the following statements is false?

  • cytosine always pairs with thymine
  • dna has a double helix structure in humans
  • adenine and thymine always pair
  • guanine and cytosine are complementary bases


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