What First Happens to the Carbon Atoms That Enter the Krebs

question 33

Multiple Choice

What first happens to the carbon atoms that enter the Krebs cycle as acetyl CoA?

• A)They are reduced to form carbon dioxide
• B)They combine with a 4-carbon sugar to form a 6-carbon sugar
• C)Two acetyl CoA molecules join together to form a 6-carbon sugar
• D)They combine with pyruvate to form a 4-carbon sugar
• E)They are activated with a phosphate from ATP

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Definitions:

Turgor Pressure

The pressure of water pushing the plasma membrane against the cell wall of a plant or bacterium, providing rigidity to the cell.

Hypertonic

A solution that has a higher solute concentration than the cytoplasm of a cell, causing cell shrinkage.

Hypotonic

Describes a solution that has a lower concentration of solutes relative to the inside of a cell, causing water to enter the cell by osmosis.

Hypertonic

Describing a solution that has a higher concentration of solutes compared to another solution, potentially causing cells to shrink due to water loss.