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Author Question: Silk contains many pleated sheets, which consist predominately of amino acids such as phenylalanine ... (Read 32 times)

sammy

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on: Aug 27, 2018
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.

Question 2

The n-type/p-type junction is like ________.
 
  A) a revolving door
  B) a one-way valve
  C) an energy escalator
  D) a receptionist


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onowka

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Reply #1 on: Aug 27, 2018
Answer to Question 1

A

Answer to Question 2

B


sammy

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Reply #2 on: Aug 27, 2018
TY


onowka

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Reply #3 on: Aug 27, 2018
You're welcome


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