Qualification > Sciences
Biology Paper 1
XaM!!:
@unknown i think its only primary n quaternary... buh m not sure.
nid404:
--- Quote from: Spy on May 20, 2010, 03:03:09 pm ---
What level of organization is Responsible For the globular shape of enzymes?
- Primary
- Secondary
- Tertiary
- Quaternary
it should be quaternary but its tertiary how :S
--- End quote ---
It's not quaternary. quaternary structure arises when there is more than one polypeptide chain. The very first globular,3-d structure is gotten by the tertiary structure. In proteins with the highest order of structure being tertiary are also globular, e.g Myoglobin.
nid404:
--- Quote from: unknown 101 on May 20, 2010, 05:33:37 pm ---13. HIV-1 protease is an enzyme produced by the HIV virus.
Two identical chains of 99 amino acids form the enzyme. In each chain, amino acids 25, 26 and
27 in the sequence form part of the active site.
Which orders of protein structure control the shape of the active site?
A primary, secondary, tertiary and quaternary
B primary, secondary and tertiary only
C primary and quaternary only
D quaternary only
why is the answer A?
--- End quote ---
The sequence of amino acids is the primary structure. When the primary structure is in itself altered, the following structures will also suffer a setback. If the sequence of amino acids in the primary structure is hydrophilic instead of phobic, then the secondary and tertiary structure will also be different, the folding of the chain will be different, the final shape will be different. Hence if a change happens in the primary structure, the following structures will also change
unknown 101:
--- Quote from: nid404 on May 21, 2010, 06:34:32 am ---
The sequence of amino acids is the primary structure. When the primary structure is in itself altered, the following structures will also suffer a setback. If the sequence of amino acids in the primary structure is hydrophilic instead of phobic, then the secondary and tertiary structure will also be different, the folding of the chain will be different, the final shape will be different. Hence if a change happens in the primary structure, the following structures will also change
--- End quote ---
Thanks :)
i didnt get the question cuz it looked retarded, Thanks again :D
nid404:
not a problem
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