Which of the Following Statements About the Binding of Oxygen

question 32

Multiple Choice

Which of the following statements about the binding of oxygen to deoxyhemoglobin is correct

• A) The binding of oxygen to Fe²⁺ in the first heme pulls the iron ion into the porphyrin ring, decreasing the affinity for the second oxygen.
• B) The binding of oxygen to Fe²⁺ in the first heme pushes the iron ion out of the porphyrin ring, decreasing the affinity for the second oxygen.
• C) The binding of oxygen to Fe²⁺ in the first heme pulls the iron ion into the porphyrin ring, increasing the affinity for the second oxygen.
• D) The binding of oxygen to Fe²⁺ in the first heme pushes the iron ion out of the porphyrin ring, increasing the affinity for the second oxygen.
• E) Oxygen does not bind to deoxyhemoglobin.

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Definitions:

Incremental Cash Flows

The additional operating cash flow that an organization receives from taking on a new project.

Opportunity Costs

The expense incurred by not choosing the second-best option available during decision-making.

Initial Cash Flow

The first influx or outflow of cash associated with an investment or project, marking the beginning of its cash flow timeline.

Sunk Costs

Expenses that have already been incurred and cannot be recovered, which should not influence future business decisions.