Section 8- Polymers And life Flashcards
(5 cards)
1
Q
What is a zwitterion?
When is the only time this state occurs?
A
It is an overall neutrally changed molecule, but with areas which are both positive and negatively charged.
This only occurs at the isoelectric point.
2
Q
What is the property called when amino acids have both acidic and basic properties?
A
Amphoteric
3
Q
How could you identify unknown amino acids?
A
Paper chromatography
4
Q
Amino acids form dipeptides and then polypeptides. They can be broken apart by hydrolysis reactions. What are the conditions required for this to occur?
A
Hot aqueous 6 moldm^3 HCl, heated under reflux for 24 hours.
5
Q
Where do disulfide bridges form?
A
On cysteine amino acids which contain thiol groups.
