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.

---

Definitions:

Promote or Demote

Terms used in hierarchical structures or lists to move an item to a higher or lower level of importance or rank.

Subdocument

A subordinate document linked or incorporated into a main document, allowing for easier management and organization of complex documents.

Outline View

A feature in many software applications that displays documents or projects as structured summaries, often showing headings and subheadings in a hierarchical format.

Show First Line Only

A feature in applications that limits the display to the first line of a text block or entry, used to manage screen space or preview content.