Question

2a) Which of the following statements about pyruvate oxidation IS TRUE?
a. NADH is oxidized in the process
b. Four carbon dioxide molecules are released in the process
c. The process takes place in the cytoplasm
d. There is substrate level phosphorylation during the process
e. Two pyruvate molecules are oxidized to two acetyl Co-A molecules.

2b) When there is sufficient oxygen, _____ ATP molecules can be made (theoretically) by cellular respiration. However, when oxygen is lacking, only _____ ATP molecules are made
a. 32,2
b. 36,2
c. 30,4
d. 36,6
e. 46,2

2c) In the electron transport chain of cellular respiration: a. oxygen has the weakest pull on electrons b. NADH and FADH2 transfer phosphates in the inner mitochondrial membrane c. the energy that is released moves electrons from the matrix to the intermembrane space d. electrons move from protein to protein due to increasing electronegativity e. water oxidizes the last component of the chain.

2d) Which of the following statements about oxidative phosphorylation (chemiosmosis) is TRUE?
a. A concentration gradient of protons in the cytoplasm causes ATP production
b. A proton motive force moves protons through NAD reductase
c. ADP is phosphorylated in the matrix of the mitochondria
d. Conditions in the mitochondria can be either aerobic or anaerobic
e. When sunlight hits the inner membrane, electrons will initiate the chemiosmosis process.

2e) Aerobic respiration can be regulated by feedback inhibition. Which of the following substances can inhibit pyruvate dehydrogenase (also known as pyruvate decarboxylase)?
a. NADH
b. citrate
c. ATP
d. ADP
e. aceyl-CoA

Answer 1

The correct answers are:

2a. Substrate level phosphorylation occurs during Pyruvate oxidation; option D.

2b. 32 ATP molecules can be made by cellular respiration but only 2 ATP molecules when oxygen is lacking; option B.

2c. Electrons move from protein to protein due to increasing electronegativity in the electron transport chain; option D.

2d. ADP is phosphorylated in the matrix of the mitochondria during oxidative phosphorylation; option C.

2e. ATP inhibits pyruvate dehydrogenase by feedback inhibition; option C.

What is glucose oxidation?

Glucose oxidation refers to the process in the cells in which glucose molecules are oxidized to form ATP and carbon dioxide in the presence of oxygen.

The first stage of glucose oxidation is the conversion to pyruvate.

Pyruvate is oxidized to acetylCoA.

AcetylCoA enters the citric acid cycle to produce reducing equivalents, NADH for the electron transport chain.

In conclusion, the true statements are as follows:

2a. In pyruvate oxidation, there is substrate level phosphorylation during the process.

2b. When there is sufficient oxygen, 36 ATP molecules can be made (theoretically) by cellular respiration. However, when oxygen is lacking, only 2 ATP molecules are made.

2c. In the electron transport chain of cellular respiration, electrons move from protein to protein due to increasing electronegativity

2d. During oxidative phosphorylation, ADP is phosphorylated in the matrix of the mitochondria

2e. Aerobic respiration can be regulated by feedback inhibition of pyruvate dehydrogenase by ATP.

Learn more about pyruvate oxidation at: https://brainly.com/question/22565849

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