Lecture 12: Proteins and Enzymes

Question 1

All proteins are composed of ___?

Answer 1

Amino acids

Question 2

How many different amino acids are there? What makes them different?

Answer 2

• 20

- R group

Question 3

What are the components of an amino acid?

Answer 3

• Acid
• Amino = ammonia
• R group

Question 4

What do enzymes do?

Answer 4

Catalyze nearly all the reaction of life

-digestion, metabolism, biosynthesis

Question 5

What protein source would probably provide the highest quality protein for human nutrition

Answer 5

Humans (but we settle for animals)

Question 6

Essential amino acids

Answer 6

Amino acids that the body can’t metabolize on its own in sufficient quantities –> must be consumed in diet

Question 7

Limiting amino acid

Answer 7

When a protein is low in one essential amino acid necessary for synthesis, this EAA is the limiting factor

Question 8

Denatured collagen forms ___?

Answer 8

Gelatin

Question 9

Cooking eggs is an example of ___?

Answer 9

Protein denaturation

Question 10

New evidence has suggested that ___ builds cartilage in humans?

Answer 10

Gelatin

Question 11

What links together amino acids?

Answer 11

Peptide bonds

Question 12

By slowly heating collagen in water, you eventually form ___?

Answer 12

Gelatin