BIOL 1201 : Exam 3
Document Summary
Photosynthesis: co2 + h2o + energy -> c6h12o6 +o2, plants, bacteria, protists (algae, about 70% of photosynthesis occurs in the aquatic environment, uses the same metabolic (biosynthetic) pathway. Ions (such as k and cl) are actively taken out of guard cells, and the water follows it by osmosis. Ions are actively put into the guard cells, and the water follows it by osmosis. Limp cells become turgid and open the stomata: lower and upper epidermis prevent water from leaving, some lower epidermis cells evolve to become guards for the stoma, mesophyll cells cells inside the leaf, vein transports sugars. Inner and outer membranes: granum = stack of thylakoids, stroma = inner liquid of cell, circular dna. If pores close because of loss of water, co2 can no longer enter the leaf. No such thing as active water transport: aquaporin: channels in which water can move through membrane of cell, facilitated diffusion with help water can move through membrane.
