1.1 Proteins - Polypeptides Flashcards
1
Q
What bonds are found in a chain of amino acids
A
peptide bonds
2
Q
What makes up 1 amino acid
A
3 consecutive bases
3
Q
How is the sequence of amino acids determined
A
by the sequence of bases in the dna code
4
Q
What is triplet code
A
3 consecutive bases code for 1 amino acid
5
Q
What is it called when something has both acidic and alkali properties
A
Amphoteric
6
Q
What reaction takes place when joining 2 peptides
A
condensation reaction
7
Q
What is the primary level of protein structure
A
- Sequence of amino acids
- peptide bonds between amino acids
8
Q
What is the secondary level of protein structure
A
- Polypeptides are folded into alpha helix or beta-pleated sheet.
- hydrogen bonds are present (to maintain structure)
9
Q
What is the tertiary level of structure
A
- Further folding into a 3D shape
- Bonds present =
Hydrogen
Ionic bonds
Disulphide bridges
Hydrophobic interactions
10
Q
What is the quaternary level of structure
A
- Protein contains 2 or more polypeptide chains joined together
