This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Silk contains many pleated sheets, which consist predominately of amino acids such as phenylalanine ... (Read 48 times)

sammy

  • Hero Member
  • *****
  • Posts: 818
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


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

onowka

  • Sr. Member
  • ****
  • Posts: 353
Reply #1 on: Aug 27, 2018
Answer to Question 1

A

Answer to Question 2

B


sammy

  • Hero Member
  • *****
  • Posts: 818
Reply #2 on: Aug 27, 2018
TY


onowka

  • Sr. Member
  • ****
  • Posts: 353
Reply #3 on: Aug 27, 2018
You're welcome


« previous next »
 

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Decorative white silk crosses are an ingenious tactic used by orb-weaving spiders to protect their w Decorative white silk crosses are an ingenious tactic used by orb-weaving spiders to protect their w
General structure of an amino acid General structure of an amino acid
Validation of the genetic code by amino acid sequence analysis of T4 phage lysozyme mutants Validation of the genetic code by amino acid sequence analysis of T4 phage lysozyme mutants
Vegetable oils are good sources of essential fatty acids Vegetable oils are good sources of essential fatty acids
Proteins are built from amino acids Proteins are built from amino acids
How many carboxylic acids and esters share the molecular formula C2H4O2? How many carboxylic acids and esters share the molecular formula C2H4O2?
Video: Mechanisms of capillary exchange

For a complete list of videos, visit our video library