A research group has discovered an organism with cells that contain a previously undescribed organelle. Researchers perform some tests on the isolated organelle to see if it is involved in any major metabolic reactions. To do this, they incubate these organelles for a period of time and determine changes in the amount of various substances in the suspending solution. The results are shown in the table. glucose | CO2 | O2 | ATP | NADH no change | increase | no change | no change | increase Based on this analysis, which metabolic process would you conclude could be taking place in this organelle? citric acid cycle glycolysis electron transport chain/oxidative phosphorylation pyruvate oxidation
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Step 1: The organelle shows an increase in NADH, which indicates that it is involved in a process that produces NADH. Show more…
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Conversion of Pyruvate to Acetyl-CoA is coupled with conversion of NAD+ to NADH. During this reaction, NAD+ becomes: oxidized and gains. reduced and gains energy. reduced and loses energy. oxidized and loses energy. 2. Oxidative phosphorylation is a process by which ATP is made. During chemiosmosis, what powers the conversion of ADP + i to ATP? energy released from substrate-level phosphorylation energy required to move protons to the intermembrane space, against their electrochemical gradient energy released as electrons flow through the electron transport chain energy released from movement of protons through ATP synthase, down their electrochemical gradient 3. CO2 is a by product of aerobic metabolism. In which of the following pathways is the bulk of the CO2 released? glycolysis electron transport the citric acid cycle oxidation of pyruvate to acetyl-CoA
Bryan V.
Where in a cell does glycolysis occur? Glycolysis is ___________________. Aerobic Anaerobic The process of attaching a phosphate group to a molecule is called ________________________. (Note – This question is not asking you to identify the type of enzyme that catalyzes this process.) ________________ is the niacin-derivative that accepts an electron during glycolysis. What are the important products of glycolysis (identified in the notes below slide 16)? The production of ATP by the transfer of a phosphate group from a molecule to ADP is called ___________________ _____________ ____________________. After glycolysis, if ________________ is unavailable to the cell, then a process called fermentation regenerates _________________. In human cells, fermentation produces a byproduct called ____________________________, which causes the "burning" muscle sensation associated with intense exercise. After glycolysis, under aerobic conditions, pyruvate is shuttled into an organelle called the _________________. Decarboxylation is when _________________ is removed from a molecule. Under aerobic conditions, for each glucose molecule that enters glycolysis, ____________ acetyl Coenzyme A molecule(s) enter the citric acid cycle. 1 2 3 4 The citric acid cycle is also known as the ______________ cycle. Per glucose that enters glycolysis, the citric acid cycle itself produces ______ ATP molecules, ______ NADH molecules, and ______ FADH2 molecules. At the electron transport chain, the average yield is __________ ATP per NADH, and _________ ATP per FADH2. Under aerobic conditions, by the end of the reactions of the electron transport chain, a human cell can produce a maximum of ____________ ATP molecules per glucose.
Supreeta N.
Which process does not occur in the organelle illustrated above? A. glycolysis B. Krebs cycle C. conversion of pyruvate to acetyl CoA D. electron transport
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