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 18 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?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

Did you know?

As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Amino Acid Codons Amino Acid Codons
Amino Acids Nails Amino Acids Nails
The 20 common amino acids used to build proteins The 20 common amino acids used to build proteins
After the chemical exfoliation substance has been applied, wrap the two top sheets around the client ... After the chemical exfoliation substance has been applied, wrap the two top sheets around the client ...
Structures of the ionized forms of some representative fatty acids (part 2) Structures of the ionized forms of some representative fatty acids (part 2)
Specific amino acid–nucleotide contacts for cI and Cro repressors Specific amino acid–nucleotide contacts for cI and Cro repressors
Video: Oxygen - hemoglobin dissociation curve & Hemoglobin's affinity with oxygen - acidity

For a complete list of videos, visit our video library