Amino Acids Flashcards Preview

AQA A Level Chemistry > Amino Acids > Flashcards

Flashcards in Amino Acids Deck (9)
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1
Q

Amino acids are chiral which gives them what property?

A

They are optically active

2
Q

Which amino acid is not optically active?

A

Glycine

3
Q

Amino acids have an NH2 group and a COOH group. What property does this give them?

A

They can act as a base and an acid

4
Q

HOOCCH2NH2 + HCl –> _______? Is glycine exhibiting acid or base properties?

A

HOOCCH2NH2 + HCl –> HOOCCH2NH3+Cl-

Base

5
Q

HOOCCH2NH2 + NaOH –> ______? Is glycine exhibiting acidic or basic properties?

A

Na+OOCCH2NH2 + H2O

Acid

6
Q

What is a zwitterion?

A

An ion with a positive charge and a negative charge which is overall neutral

7
Q

How are peptides formed?

A

Can form via an amide or peptide bond between 2 amino acids

8
Q

Why would we break down a protein?

A

To tell us which amino acids are in the polypeptide chain

9
Q

This type of protein has parallel polypeptide chains that form long fibres. What type of protein is it?

A

Fibrous