Prepared by Michael Nawfal

 

Questions

 

1-   Which is False?

a-      pKa is the pH at which half of the acid is in the dissociated form and half is still in the undissociated form

b-     At a pH of 4   an acid with a pKa of 5  has     [HA] > [A-]

c-      Asn  amino Acid   has 3 dissociable groups

 

 

2-     Which is False?

a-      Gaining Hydrogen or Electrons is a reduction

b-     Oxidizing agents get reduced in an   Oxidation/Reduction Reaction

c-      Reducing Agents get oxidized in an Ox/Red  Reaction

d-      B and C

e-      Oxidants get oxidized in an  Ox/Red Reaction

 

 

3-     Which is False?

a-      When exposed to Extremely hot and acidic conditions, disulfide bonds still need sulfhydryl agents to be broken

b-     When exposed to EXTREMELY hot acidic medium, peptide bonds between Amino Acids still need specific enzymes to be broken

c-      Sulfhydryl reagents are not oxidizing agents since they interact with oxidizable groups

 

 

4-     Which is not false?

a-      All known Enzyme proteins and non enzyme proteins are irreversibly denaturable

b-     After denaturing a protein without using specific enzymes, nor extreme conditions, only IIary , IIIary, and IVary  structures are lost

c-      IIary  structure arrangement of a protein is enough for its activity

 

 

Question  of the session:

Why does Hypercysteinemia cause stones in the urinary system

What is that disease called?