Module 5

Question 1

What is protein?

Answer 1

1. component of all living cells
2. made of of amino acids
3. Every AA contains nitrogen (proteins are 16% N by weight)

Question 2

Essential Amino Acids

Answer 2

histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.

Question 3

Nonessential Amino acids

Answer 3

alanine, arginine, asparagine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine and tyrosine.

Question 4

how many peptide bonds are in a tripeptide?

Answer 4

2

Question 5

primary structure:

Answer 5

linear order of amino acids in a protein

Question 6

Secondary structure:

Answer 6

shapes within a protein
- 3 plated sheet
- helix

Question 7

Tertiary structure:

Answer 7

Final 3 dimensional shape of protein

Question 8

The quality of a protein is determined by:

Answer 8

• Digestibility of a protein
• Types of AA: all plant protein is incomplete protein
• Proportion of Amino acids

Question 9

What is a good quality protein?

Answer 9

1. All essential AA is proportions needed formal requirements
2. well digested

Question 10

N- retention:

Answer 10

Amount of N kept in the body after eating foods is superior to that of Free AA1