mcqs

• Which of these organelles evolved by endosymbiosis?A.Lysosome

  A.lysosome

  B. Nucleus

  C. Chloroplast

  D. Golgi apparatus

  • answer C: chloroplasts and mitochondria were once free-living bacteria that were engulfed by ancestral eukaryotic cells, bacteria became integrated into the host cell as organelles
• Which of these could be studied to provide evidence that an organelle evolved by the endosymbiosis of a bacterial cell?

  1. A.The organelle’s DNA
  2. B. The size of the organelle
  3. C. The number of membrane layers
  4. D. The organelles function

  • answer: A: The DNA in the chloroplast & mitochondria is similar to bacterial DNA, in terms of structure and replication.
• which level of protein structure describes assembled subunitsassembled?

  • primary
  • secondary
  • tertiary
  • quarternary

  answer: tertiary