1. What is the purpose of investing two ATP molecules per glucose in the early steps of glycolysis? 2. a) Explain two ways that plants in hot, arid environments have adapted to be able to take in enough CO2 to perform photosynthesis without losing so much water that they become dehydrated. b) What are the major products of the light reactions of non-cyclic electron flow? what are these products needed for and where do they accumulate in the chloroplast? c)What is the source of O2 and sugar in photosynthesis? Where are these produced? 3. a) Vinblastine, a chemotherapeutic drug used to treat breast and testicular cancers, interferes with the assembly of microtubules. Speculate how this drug works to inhibit cancer cell growth. b) Explain how cyclin and CDK work together to regulate cellular passage into and out of mitosis? c) What are 3 reasons mitosis is important for life (when do we need to be able to do mitosis)? d) Explain why cancer is more common in older adults than in young people. e) p21 in a cell cycle regulator that prevents abnormal cells from replicating their DNA. What type of protein is p21? How could a mutation in p21 cause cancer?
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