1.8 Proteins: Amino Acids

Question 1

What are amino acids?

Answer 1

The building blocks of proteins

Question 2

How do amino acids join together?

Answer 2

Via peptide bonds

Question 3

What are the roles of proteins?

Answer 3

Enzymes

Question 4

What is the general structure of an amino acid?

Answer 4

Central carbon

Question 5

How many different amino acids are commonly found in living organisms?

Answer 5

Around 20

Question 6

What determines the properties of an amino acid?

Answer 6

The R group

Question 7

How are dipeptides synthesised?

Answer 7

By condensation reactions

Question 8

How are dipeptides broken down?

Answer 8

By hydrolysis reactions

Question 9

What type of bond joins amino acids?

Answer 9

Peptide bond

Question 10

What happens in a condensation reaction of amino acids?

Answer 10

A peptide bond forms and water is released

Question 11

What happens in a hydrolysis reaction of dipeptides?

Answer 11

The peptide bond is broken and water is added

Question 12

How do you test for proteins?

Answer 12

Add Biuret solution

Question 13

What is a positive result for proteins?

Answer 13

A purple solution

Question 14

What is a negative result for proteins?

Answer 14

A blue solution