The Difference Between the Stretching Ability of Silk and Wool $\alpha$

question 78

Multiple Choice

The difference between the stretching ability of silk and wool fibers, low and high ability to stretch, respectively, is due to their protein components. Which statement CORRECTLY attributes the secondary structure contributions to this stretch ability?

• A) Both silk and wool fibers have roughly equal distributions of \(\alpha\) helices and \(\beta\) sheets, but they are arranged in different conformations.
• B) Silk is mainly \(\beta\) sheets; wool is mainly \(\alpha\) helices.
• C) Silk is mainly \(\alpha\)helices; wool is mainly \(\beta\) sheets.
• D) Silk contains mainly \(\beta\) barrels; wool contains mainly coiled-coil \(\alpha\) helices.
• E) Silk contains coiled-coil \(\alpha\) helices; wool contains mainly \(\beta\) barrels.

---

Definitions:

Lockbox System

A service offered by banks to companies for the collection of payments from customers, utilizing a special post office box to speed up the deposit of checks.

Daily Savings

The act of setting aside a portion of one's income or resources each day for future use, aiming for financial security or meeting specific goals.

Treasury Bills

Short-term government securities with maturity periods of one year or less, offering a safe investment with minimal risk.

Collection Float

Collection Float refers to the time delay between when a check is deposited into a bank account and when the amount is actually available for use.