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Tutor profile: Cassidy S.

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Cassidy S.
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Questions

Subject: Biochemistry

TutorMe
Question:

How many NET ATP molecules are produced from a single glucose molecule during aerobic respiration in humans? (For the sake of simplicity, use the rounded values of 3ATP molecules/NADH molecule and 2ATP molecules/FADH2 molecule).

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Cassidy S.
Answer:

36 ATP molecules. Glycolysis yields 2 NET ATP (4 in total but 2 were used during the energy investment phase). Glycolysis also provides 2 NADH molecules which are later used to produce energy in cellular respiration. However, these NADH molecules only encourage the production of 2 NET ATP molecules each due to the energy required to bring them into the mitochondrion for cellular respiration via shuttle. Pyruvate oxidation yields 2 NADH molecules. The Citric Acid Cycle produces 2 ATP, 6 NADH molecules and 2 FADH2 molecules. In the electron transport chain, each NADH molecule leads to the production of 3 ATP molecules while each FADH2 leads to the production of 2 ATP molecules. So... 2NADH (pyruvate oxidation) + 6NADH (CAC) = 8NADH (x3ATP)= 24ATP 2FADH2 (CAC) x 2ATP = 4ATP 2 ATP (glycolysis) + 2 ATP (CAC) = 4ATP Finally, remember to include the 2 NADH molecules from glycolysis that produced roughly 2ATP molecules each, due to utilization of energy by the transportation shuttle= 4ATP 24ATP + 4ATP + 4ATP +4 ATP = 36ATP molecules.

Subject: Basic Chemistry

TutorMe
Question:

How does Le Chatelier's principle apply to chemical reactions?

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Cassidy S.
Answer:

Le Chatelier's principle outlines how changes in concentration, temperature, or pressure to an equilibrated system will produce corresponding changes on the opposite side of the reaction, bringing the chemical reaction towards equilibrium. For example, adding more reactants to a solution will increase the production of product so that concentrations on either side of the chemical equation remain in equilibrium.

Subject: Biology

TutorMe
Question:

Which cells are responsible for producing and secreting surfactant in the lungs?

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Cassidy S.
Answer:

Type II pneumocytes

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