Silk Contains Many Pleated Sheets, Which Consist Predominately of Amino

question 132

Multiple Choice

Silk contains many pleated sheets, which consist predominately of amino acids such as phenylalanine and valine. Silk is more waterproof than cotton. Why?

• A)Pleated sheet structure of silk occurs when mostly nonpolar amino acids are grouped together.
• B)Pleated sheet structure of cotton occurs when mostly polar amino acids are grouped together.
• C)It is the secondary, tertiary and quaternary structure of silk that make it repel water.
• D)Since cotton is made from a plant, it cannot have nonpolar molecules.

Identify fat-soluble vitamins and their properties.

Describe the function of eicosanoids and their role in the body's response to injury.

Understand protein denaturation and factors that cause it.

Recognize the structural hierarchy in proteins and the significance of each level for its function.

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