In a reaction, isocitrate is converted to alpha- ketoglutarate. In the same reaction, NAD+ is converted to NADH. No other molecules participate. What molecule acts as an electron donor in this reaction? NAD+ alpha-ketoglutarate NADH isocitrate Assume you are working for a chemical company and are responsible for growing a yeast culture that produces ethanol. The yeasts are growing well on the maltose medium but are not producing alcohol. What is the most likely explanation? The maltose is toxic. O2 is in the medium. Not enough protein is provided. The temperature is too high.
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Since NAD+ is converted to NADH, it means that NAD+ is accepting electrons, not donating them. Show more…
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Assume you are working for a chemical company and are responsible for growing a yeast culture that produces ethanol. the yeasts are growing well on the maltose medium but are not producing alcohol. what is the most likely explanation? the temperature is too high. not enough protein is provided. the temperature is too low. o2 is in the medium. the maltose is toxic.
Madhur L.
Exhibit A: Consider the reaction of alcohol dehydrogenase: CH3CH2OH + NAD+ -> CH3CHO + NADH + H+. Referring to exhibit A: Which molecule is reduced? H+ NADH NAD+ Ethanol Acetaldehyde
Sri K.
When humans consume alcoholic beverages, the enzyme alcohol dehydrogenase catalyzes the conversion of ethanol to acetaldehyde. Acetaldehyde is then metabolized to acetate, catalyzed by the aldehyde dehydrogenase enzyme. The coenzymes NAD+/NADH are required for both steps (NAD = nicotinamide adenine dinucleotide). The two-step conversion of ethanol to acetate is shown below. Considering the structures shown, answer the following questions. (HINT: refer to Chapter section 10.8 in McMurry on oxidation-reduction in organic molecules.) a. Is ethanol oxidized or reduced when it is converted to acetaldehyde? b. Is acetaldehyde oxidized or reduced when it is converted to acetate? c. Is NAD+ oxidized or reduced when converted to NADH?
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