Researchers Are Studying the Structure and Function of Hemoglobin

question 175

Multiple Choice

Researchers are studying the structure and function of hemoglobin.  Arterial and venous blood samples are obtained from enrolled volunteers with no health problems.  Red blood cells are isolated from whole blood by differential centrifugation, and the contents of the intact red blood cells are analyzed.  It is found that the concentration of chloride is much lower in the red blood cells in the arterial sample compared to the venous sample.  The activity of which of the following enzymes is most likely responsible for the observed finding?

• A)Bisphosphoglycerate mutase
• B)Carbonic anhydrase
• C)Glucose-6-phosphate dehydrogenase
• D)Na⁺-K⁺ ATPase
• E)Pyruvate kinase

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Definitions:

Chart of Accounts

A systematic list of all account titles and numbers used by a company, organized to support the recording of transactions.

Trial Balance

A bookkeeping worksheet in which the balances of all ledgers are compiled into debit and credit account columns to verify that the ledger accounts are correctly balanced.

Ledger Balances

The current totals in ledger accounts, reflecting all transactions up to a given point in time.

Trial Balance

An accounting report that lists the balances of all ledgers accounts to verify that total debits equal total credits.