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 64 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?

The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

The effect of a double bond on the shape of fatty acids The effect of a double bond on the shape of fatty acids
Amino acid codon chart Amino acid codon chart
Layers of sheets and towels on the table for a body wrap. Layers of sheets and towels on the table for a body wrap.
Versatility of the pyridoxal phosphate Schiff base (aldimine) in amino acid reactions Versatility of the pyridoxal phosphate Schiff base (aldimine) in amino acid reactions
Guanosine 3’,5’-tetraphosphate senses amino acid starvation Guanosine 3’,5’-tetraphosphate senses amino acid starvation
Metabolic pathway involving phenylalanine and tyrosine Metabolic pathway involving phenylalanine and tyrosine
Video: Hershey Chase Experiments

For a complete list of videos, visit our video library