Biological Molecules PPQ

Question 1

Which diagram shows the structure of the glucose produced by the breakdown of glycogen? (1)

Answer 1

Hexagon shape
H on top
OH on bottom

= alpha glucose

Question 2

Describe the structure of proteins (6)

Answer 2

Polymer of amino acid’s

Joined by peptide bonds

Formed by condensation reactions

Primary structure is order of amino acids

Secondary structure is folding of polypeptide chain due to hydrogen bonding

Tertiary structure is 3-D folding due to hydrogen bonding and ionic bonding

Quaternary structure is TWO or more polypeptide chains