BIO 121 Lecture Notes - Lecture 15: Tunxis Community College, Photosynthesis, Electrochemical Gradient
23 Nov 2020
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Part of a large family of organelles called plastids: most plastids have no photosynthetic activity, usually involved in storage, production of sugars, lipids, nucleotides and gravity sensing in roots/shoots. Inner and outer membrane and internal membrane system (mitochondria don"t have) Site at which light energy is captured and used to make carbohydrates from co2. Captures light energy to produce proton gradient to drive production of atp, nadph to then fix atomospheric co2, reduce it, turn into carbs. Atp is the short term energy store used in carbon reduction in chloroplasts: neveer leaves the chloroplast. Long term energy is in production of carbs. Cytoskeleton -comprises all filamentous proteins that provide shape and structure ot the cell. Made of repeating subunits called actin (g-actin) Undergo dynamic instability w/ atp as energy source. In animals involved in cellular movement, adhesion, shape, cytokinese, cargo trafficking, muscle contraction. Remain close to plasma membrane (cortical arrangement)
