Which of the Following Is a Characteristic of Hemoglobin

question 18

Multiple Choice

Which of the following is a characteristic of hemoglobin?

• A) It is composed of four identical polypeptide chains.
• B) There is one heme group per active Hb molecule.
• C) Oxygen and carbon dioxide compete for the same binding site on heme.
• D) It is an elongated, fibrous-type protein, hence is not very soluble in water.
• E) Binding of oxygen to Hb results in change in the pKa of certain histidine residues toward lower values.

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Definitions:

Credit

A financial arrangement where a borrower receives something of value with the agreement to repay it later, often including interest.

Normal Balance

The side of an account that is usually positive or increased; for assets and expenses, it's the debit side, for liabilities, equity, and revenue, the credit side.

Account

An individual record within a financial system or ledger that tracks the financial transactions of a specific asset, liability, revenue, expense, or equity component.

Normal Balance

The side (debit or credit) on which increases to the account are recorded, consistent with the accounting equation.