Proteins

Question 1

Two types of proteins

Answer 1

Fibrous and globular

Question 2

Fibrous proteins

Answer 2

Long spiralling chains folded to form structures like hair and fingernails.
Generally insoluble in water.

Question 3

Globular proteins

Answer 3

Chains of amino acids folded into spherical shapes and form structures like haemoglibin, enzymes and hormones.
Generally soluble in water

Question 4

How are proteins formed

Answer 4

By the condensation of thousands of amino acids

Question 5

Functional groups of amino acids

Answer 5

They have the amine: -NH2

And carboxyl: -COOH

Question 6

Essential amino acids

Answer 6

Amino acids that the body is unable to synthesise on its own.

Question 7

How does the body obtain amino acids?

Answer 7

From eating protein in our diet

Question 8

When drawing protein molecular structure-

Answer 8

Amino acids join from the N-C, there are open bonds at these points on either side of the protein.

Question 9

How to count number of amino acids in a protein

Answer 9

Count number of C=O, or number of amino acid links plus 1 (except in a circle)

Question 10

How are proteins held together.?

Answer 10

By the hydrogen bonds between amino acids

Question 11

What does heating do to the proteins

Answer 11

It breaks apart the hydrogen bonds between molecules