A-LevelBiologyBiological moleculesOct/Nov 2024Paper 1 Q141 Mark
Phospholipids are formed in a similar way to triglycerides. A sample contained six phospholipid molecules. • The molecular weight of a phosphate ion is 95 g mol⁻¹. • The molecular weight of each individual fatty acid in this sample was found to be 282 g mol⁻¹. • The molecular weight of glycerol is 92 g mol⁻¹. • The molecular weight of water is 18 g mol⁻¹. What is the molecular weight of the sample in g mol⁻¹?
A2598
B4182
C4506
D4830
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The correct answer is B. This question tests the candidate's understanding of biological molecules within the Biologysyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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