Chloroplast By: Alyssa Mecca & Rachel Wargo

The Chloroplast  A plastid found in plant cells  Chloroplast is the organelle in which photosynthesis takes place and contains green chlorophyll  Surrounded by a double membrane with water and enzymes on the inside, there is also a third membrane  Capture light energy to conserve free energy in the form of ATP

Chloroplast v Mitochondria  Chloroplast-the proton gradient is generated across the thylakoid membrane and used to drive ATP synthesis in the stroma  Mitochondria-electron transport generates a proton gradient across the inner membrane, which is then used to drive ATP synthesis in the matrix

Functions  Thylakoid membrane forms a network of flattened discs, which are arranged in stacks called grana –light reactions cause the thlyakoid to develop a high concentration of hydrogen ions, for the production of ATP by the chloroplast  Stroma houses DNA  Proteins are encoded by genes in the nucleus, with the protein products transported to the chloroplast

Disease  Tobacco Mosaic Virus (TMV) –the viral helicase protein and a chloroplast protein form a complex that is recognized by a plant immune receptor –RNA virus that infects tobacco plants, causes characteristic patterns such as mottling of dark and green areas on the leaves –Stunts a plants growth but does not cause death

Skinner Style Questions 1.)Chloroplast have the most in common with? A.Mitochondria B.Lysosome C.Golgi bodies D.Cytoplasm 2.) Which of these are not part of the Chloroplasts’ structure. A.a.Stroma B.b. chlorophyll C.c.Thylakoids D.d. Granum

Skinner Style Question Answers 1) A-mitochondria 2) B-chlorophyll