A-LevelBiologyBiological moleculesOct/Nov 2009Paper 1 Q121 Mark
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?
Aprimary, secondary, tertiary and quaternary
Bprimary, secondary and tertiary only
Cprimary and quaternary only
Dquaternary only
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The correct answer is A. This question tests the candidate's understanding of biological molecules within the Biologysyllabus. The examiner's mark scheme requires...
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