Experiments on the Bacterial Serine Protease Subtilisin Show That Even

question 9

Multiple Choice

Experiments on the bacterial serine protease subtilisin show that even when all three residues of the catalytic triad are mutated, the catalytic rate of the enzyme is still 3000 times the uncatalyzed reaction rate. Which mode of catalysis is likely responsible for this remaining catalytic activity?

• A) acid-base catalysis
• B) covalent catalysis
• C) transition-state stabilization
• D) hydrophobic effects

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Definitions:

Allowance for Doubtful Accounts

An estimation of the amount of accounts receivable that may not be collected, used to reduce the overall accounts receivable value on the balance sheet.

Adjustment

A process of altering the value of accounts to more accurately reflect their true value at the end of an accounting period.

Balance Sheet Approach

A method of estimating an allowance for doubtful accounts based on the accounts receivable's ending balance, helping to present a more accurate picture of a company's financial health.

Allowance for Doubtful Accounts

An estimate of the amount of accounts receivable that may not be collectible, recorded as a contra asset account.