Yeast do not have the malate-aspartate shuttle or the glycerol-3-p shuttle. they also do not have transporters for any convenient molecules, so they must use small, uncharged molecules to cross the membrane. however, they must regenerate cytoplasmic nadh to nad+ and move its 2e- and h+ into the matrix. yeast have acetaldehyde (structure below) and two dehydrogenase enzymes that can use acetaldehyde as a substrate: one in the mitochondria and one in the cytoplasm. based on your understanding of shuttles, suggest how the yeast shuttle may work. draw the structures of reactants and products, arrows with direction (don’t worry about reversibility) and at least 1 mitochondrial membrane. full credit requires a full cycle.

Asmall amount of a solid is added to water. the observation made after fifteen minutes is shown in the figure. which of these solids has been probably added to water? a) oil b) sand c) sugar d) wood chips

Part b: study of equilibrium on solubility: mg(oh)2(s) ⇌ mg2+(aq) + 2 oh–(aq) cloudy clear (pink) 7. a. b. 8. a. b. 9. 10. 11. 12. when adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 7a. you should indicate which ion was added to or removed from the equilibrium mixture. when adding edta, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 8a. you should indicate which ion was added to or removed from the equilibrium mixture. upon heating in which direction is the equilibrium shifting? upon cooling in which direction is the equilibrium shifting? is the forward reaction a. endothermic explain your answers to questions 9, 10, and 11. (l) left (r) right (l) left (r) right b. exothermic

Draw metallic bonding if two copper