Organic molecules

Question 1

What is a zwitteron?

Answer 1

a substance that has a positive and negative group in it

Question 2

how does an amino acid exist at equilibrium?

Answer 2

acidic- the NH3+ exist and CO2H exist

neutral- the NH3+ exist and CO2 exist

basic- the NH2exist and the CO2 exist

Question 3

What is the isoelectric point?

Answer 3

this is the point where the amino acid is neutral, no net charge

PI = (pKa1 +pKa2)/2

above the isoelectric point the amino acid will be basic,

below it will be acidic

Question 4

What is a polypeptide?

Answer 4

a polymers with 40 to 1000 amino alpha sequences

Question 5

What are the different levels of protien structure?

Answer 5

Primary- sequence of amino acids

secondary - alpha helix or beta pleated sheets determined by H bonding. proline cannot participate it cannot hydrogen bond. it is found at the beginning and ent of proteins

tertiary- the folding of the protein. cysteine stabilizes the tertiary structure because of the disulfide bonds

quartenary structures- the structure of the interaction of two or more proteins

Question 6

How do you classify sugars?

Answer 6

By the functional group aldehyde(aldose) or ketone(ketose)

or by the number of carbons 6(hexose) 5(pentose)