questions i got wrong

Question 1

what is starch hydrolysed into

Answer 1

maltose
not glucose because maltose is hydrolysed to get glucose as maltose is two glucose molecules

Question 2

the polypeptide chain (chain of amino acids) can twist to form an a-helix.
what is this structure known as

Answer 2

secondary structure

Question 3

fibrous proteins usually have a structural function
explain why

Answer 3

consist of long unbranched chains with cross links which make them physically strong

Question 4

Globular proteins can be used as recognition molecules on cells surface explain why

Answer 4

think enzymes

globular proteins have a specific 3d shape
which makes the proteins distinctive for recognition

Question 5

describe the process by which pepsin breaks down a protein (3)

Answer 5

pepsin binds to proteins active site to form an enzyme-substrate complex (1) this lowers the activation energy for the breakdown of the protein as it puts strain on the proteins bonds making them easier to break (1) the reaction is catalysed and products are released (1)