OCR AS Level biology A HO20/02 Mark Scheme Oct 2021/Depth in Biology
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
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