A-LevelBiologyEnzymesOct/Nov 2014Paper 1 Q131 Mark
Which words from the table correctly complete the paragraph about enzymes? When the pH of an environment is decreased below an enzyme's optimum pH, ………..1..... between adjacent ……….2... groups, holding the .....3...... structure, are disrupted.
A1: hydrogen and ionic, 2: R, 3: tertiary
B1: hydrogen, 2: hydroxyl, 3: secondary
C1: ionic and peptide, 2: R, 3: primary and tertiary
D1: peptide, 2: amine, 3: primary
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The correct answer is A. This question tests the candidate's understanding of enzymes within the Biologysyllabus. The examiner's mark scheme requires...
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