Biological Molecules: Bonding in protiens.

Question 1

Where are these bonds found?

Answer 1

= Between the R Group of the amino acid in a polypeptide chain

Question 2

What does the type of bonding depend on?

Answer 2

= depends on specific amino acids present in polypeptide chain

Question 3

What is the first bond?

Answer 3

= Hydrogen bonds
= opposite charges- polar
= contributes to the 3 dimensional shape of a polypeptide chain

Question 4

What are points about hydrogen bonds?

Answer 4

= weak
= easily be broken by high temperatures +PH changes

Question 5

What is the second type of bonding?

Answer 5

= hydrophobic or hydrophilic interactions
= several amino acids have uncharged R groups- non polar
= not atracted to water- cluster together away from water - exclude water molecules

Question 6

Where are hydrophobic interactions tend to be found?

Answer 6

= centre of proteins

Question 7

Where do hydrophilic interactions tend to be found?

Answer 7

= surface of the proteins

Question 8

What is the third type of bonding?

Answer 8

= ionic
= between amino acids with charged R groups
= can be broken by changes in PH
= (reasons for enzymes can be denatured)
=

Question 9

What is the final type of bonding?

Answer 9

= sulfur atoms can form covalent bonds
= disulfide bond
= strong- not broken by high temperatures or Ph changes

Question 10

If these bonds form between amino acid chains on the same polypeptide chain what does this mean?

Answer 10

= involved in teritary structure

Question 11

if these bonds form between different sub units what does this mean?

Answer 11

= quaternary structure