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What is the main source of energy ?
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- In preparing pyruvate to enter the citric acid cycle, which of the following steps occurs?-Pyruvate is reduced to acetyl-coA, which involves the reduction of pyruvate, the addition of a carbon dioxide from the environment, and its reduction by NADH.-Pyruvate is ionized directly to acetyl-coA.-Pyruvate is oxidized, and a molecule of carbon dioxide is removed. The electrons removed in this process are used to reduce NAD+ to NADH.-Pyruvate is oxidized, and a molecule of carbon dioxide is removed. The electrons removed in this process are donated to NADH to produce NAD+.-Pyruvate is reduced, and a molecule of carbon dioxide is removed. The electrons removed in this process are used to oxidize NAD+ to NADH.
- A primary function of cholesterol in the plasma membranes of some animals is tofacilitate the removal of hydrogen atoms from saturated phospholipids.facilitate cell-cell interactions by binding to receptors on neighboring cells.make the membrane more rigid, allowing it to resist pressure from outside the cell.enable the membrane to stay fluid more easily when the temperature drops.
- Function - gives cells strength and structure