Cell Structure and Function - Endosymbiosis

Question 1

endosymbiosis

Answer 1

• a mutually beneficial relationship within a cell.
• Mitochondria and Chloroplasts were at one time small prokaryotes that began living inside larger cells.
• Over time the cells began working together beneficially and eventually became one organism.
• They “got inside” a eukaryotic cell by first being a parasite or as a prey item for the larger cell.

Question 2

mitochondria and chloroplasts

Answer 2

• Mitochondria are found in all cells.
• Chloroplasts are found in photosynthetic cells.
  These organelles contain their own DNA and ribosomes.
• Ribosomes are smaller than the cellular ribosomes.
• DNA is more similar to the DNA in prokaryotic cells.
• Double-membraned: both have an outer membrane and an inner membrane system including:
• Cristae in Mitochondria
• Thylakoids and grana in Chloroplast​