Which of the Following Observations Helps to Explain the Conformational

question 16

Multiple Choice

Which of the following observations helps to explain the conformational changes that occur in hemoglobin upon binding to oxygen?

• A) The four heme groups are positioned close to the surface of the molecule.
• B) An αβ dimer rotates and slides with respect to the other dimer upon binding oxygen.
• C) Neither the heme nor the iron ion in the deoxy conformation is in a planar conformation.
• D) All of the above
• E) B and C

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Definitions:

Heart Valve Defects

Abnormalities or impairments in the valves of the heart that can disrupt blood flow, ranging from congenital defects to age-related degeneration.

Negatively Correlated

A statistical relationship between two variables in which one decreases as the other increases, and vice versa.

Bystanders

Individuals who are present at an event or incident but do not take part in it.

Helping Behaviour

Actions taken to assist or benefit another individual or group without expectation of reward.