OCR AS Level Biology A H020/02 Mark Scheme Oct 2021 Depth in Biology
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1 (a) (i) soluble / polar ✓ 1 (a) (ii) any three from: glycogen (compared to amylopectin) more branched ✓ more coiled ✓ (so is) more compact / less space needed (for storage)✓ (branching ... gives) many / more, free ends✓ where glucose can be added or removed✓ (so) speeds up glucose, release / hydrolysis✓ 1 (a) (iii) OH / H, group on C1 is in opposite position to, beta glucose / Fig 1.1 OR in alpha glucose -H is at top and -OH is at bottom on C1✓ 1 (b) diagram completed to show correct position of all 5 carbon atoms in a pentose ✓ [Show More]
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