Chloroplasts and Mitochondria Two special cell organelles

Similarities Membrane-bound organelles Contain their own DNA

Endosymbiont Theory 1.Ancestral prokaryote 2.Infolding of the membrane forms membrane enclosing nucleus 3.Also becomes endoplasmic reticulum 12 and 3

Endosymbiont Theory 4.Ancestral prokaryote becomes a host cell by engulfing another prokaryote—one that consumes others for food (heterotrophic) & that respires (uses oxygen) 5.Some of these ancestral prokaryote also engulf a photosynthetic prokaryote 6.Eventually these engulfed prokaryotes live inside the cell (symbiosis) in a way that is beneficial to the host 4 56

Differences Chloroplasts – Only found in plant cells – Contain chlorophyll – Location of photosynthesis Mitochondria – Found in both plant and animal cells – Location of respiration

Photosynthesis…

…& Respiration What is the relationship between these 2 equations? (Hint: look closely at their reactants and products)

Chloroplasts Capture light energy and convert it to chemical energy through photosynthesis Chlorophyll is a green pigment in thylakoids that traps light. Green is not the only pigment that plants contain What are some other colors visible in plant leaves?

Mitochondria Convert fuel particles (mainly sugars) into usable energy. Highly folded inner membrane Sugars are broken down on the membrane surface? Therefore, what is the benefit to having a highly folded inner membrane?