A Chemical Cross-Linking Reagent Has Two Reactive Ends That Can

question 69

Multiple Choice

A chemical cross-linking reagent has two reactive ends that can be used to covalently link two different amino acid groups in proteins.The links that result are similar to a disulfide bridge that forms between two cysteine groups.Biochemists use chemical cross-linking reagents to test for conformational changes in proteins because the cross-links often freeze proteins in a single conformation.Which method of increasing reaction rates would be most adversely affected by chemical cross-linking?

• A) Metal ion catalysis
• B) Covalent catalysis
• C) Acid-base catalysis
• D) Induced-fit mechanism
• E) Substrate orientation

---

Definitions:

Closing Entries

These are journal entries made at the end of an accounting period to transfer the balances of temporary accounts to permanent accounts and prepare the company's books for the next period.

Permanent Accounts

These are balance sheet accounts whose balances are carried over to the next accounting period, such as assets, liabilities, and equity accounts.

Income Summary Account

A temporary account used in accounting to transfer the sums of revenues and expenses at the end of an accounting period.

Dividends Declared Account

An account used to record the amount of dividends that a company's board of directors has decided to distribute to its shareholders.