Qualification > Sciences
Biology Paper 1
cashem'up:
yea but too be more specific tertiary is when there is only one polypeptide chain and in quartenary more than one , and yes tertiary structure is a part of the quartenary structure therefore it is possible that like haemoglobin they mention such as globular....
unknown 101:
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?
unknown 101:
Which of the following are increasing the spread of malaria?
1 continued migration of people due to war and civil unrest
2 increasing carbon dioxide levels causing global warming
3 increasing resistance to antibiotics and other drugs
A 1 and 2 only
B 1 and 3 only
C 2 and 3 only
D 1, 2 and 3
the answer is D, but how does increasing carbon dioxide levels cause an increased spread of malaria?
is it because it produces an optimum temp for the female anopheles mosquito eggs to hatch?? :S
AN10:
it is because mosquitoes prefer warm temperature which is required by malarial parasite to complete their growth cycle.
unknown 101:
--- Quote from: AN10 on May 20, 2010, 11:51:29 pm ---it is because mosquitoes prefer warm temperature which is required by malarial parasite to complete their growth cycle.
--- End quote ---
Thanks :)
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