\' Please help prepare me for tomorrow \"Animals have mitochondria, and plants h
ID: 86521 • Letter: #
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Please help prepare me for tomorrow
"Animals have mitochondria, and plants have chloroplasts." Although technically accurate, why is this statement misleading? Is glucose itself in a reduced state or an oxidized state? When NADH gives up its electrons to become NAD^+, is it being oxidized or reduced? When oxygen is unavailable, why do electron transport and chemiosmosis stop? In the absence of oxygen, how much more glucose would a cell need to oxidize to maintain the same level of energy production as in the presence of oxygen? Distinguish between substrate-level phosphorylation and oxidative phosphorylation. What role does O_2 play in cellular respiration? The drug 2, 4-dinitrophenol (DNP) can get into mitochondria, and carry protons from the inner membrane space, across the inner membrane, and into the matrix. What is the effect of DNP on ATP synthesis in the presence of oxygen? Would DNP affect fermentation in yeast?Explanation / Answer
(1)Both plants and animal cells have mitochondria, but only plant cells have chloroplasts
(2)All monosaccharides are reducing sugars, glucose is in a reduced state
(3)Once NADH gives its electrons it gets oxidized.
(4)Oxygen is the terminal electron acceptor in the electron transport chain. Absence of oxygen means absence of electron pulling power. Electrons will not flow through the electron carriers
(5) 19 moles of glucose
Explanation:
A total of 38 ATP molecules can be made per oxidised glucose molecule during cellular respiration in the presence of oxygen per mole of glucose
But in the absence of oxygen only 2 ATP are formed per mole of glucose.
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