Unit 2 Proteins

Question 1

Why are proteins important?

Answer 1

Major structural materials of animal tissue
Maintenance and regulation of life processes

Question 2

What are enzymes?

Answer 2

Are proteins which act as a biological catalyst

Question 3

How are proteins made?

Answer 3

Condensation reaction between amino acids

Question 4

How does condensation reaction between amino acids work?

Answer 4

The amino group of one amino acid and the carboxly group of another join with the elimination of water

Question 5

What functional groups are present in amino acids?

Answer 5

Carboxly group
COOH
Amino group
NHH

Question 6

What link is formed during condensation of amino acids?

Answer 6

Peptide/amide link
CONH

Question 7

How can proteins which fulfill different roles in the body be made?

Answer 7

By linking together diffrent sequences of amino acids

Question 8

What are essential amino acids?

Answer 8

Those that cannot be produced by the body and must be obtained by diet

Question 9

How can proteins be broken down to amino acids?

Answer 9

Enzyme hydrolysis

Question 10

Describe the structure of a protein?

Answer 10

The long chain molecules can form spirals, folded sheets or globular shapes.
Hydrogen bonds are the intermolecular forces present between protein chains
When protein is heated the intermolecular bonds are broken and protein changes shape(denatured)

Question 11

What does denturing of a protein cause?

Answer 11

Changes to texture of food when heated