4. Compact; OR 5. Large molecule; 6. Cannot leave cell; 2 (c) 1. Long and straight chains; 2. Become linked together by many hydrogen bonds to form fibrils; 3. Provide strength (to cell wall); 3 [7] M2. (a) (i) / Beta glucose; β Accept b / B Reject any reference to alpha / α 1 (ii) Glycosidic; Reject references to glycosidic bond, but allow beta 1-4, or α(1-4) unspecified reference to 1-4 (1,4) 1 (iii) OH / hydroxyl / HO; Reject hydroxide Reject OH / HO molecule Ignore alcohol 1 (b) (i) Starch Cellulose 1. (1,4 and) 1,6 1. 1,4 bonds / no 1,6 bonds / contains 1,6 bonds / bonds / branching unbranched / straight; 2. All glucoses / 2. Alternate monomers same glucoses / monomers
4. Compact; OR 5. Large molecule; 6. Cannot leave cell; 2 (c) 1. Long and straight chains; 2. Become linked together by many hydrogen bonds to form fibrils; 3. Provide strength (to cell wall); 3 [7] M2. (a) (i) β / Beta glucose; Accept b / B Reject any reference to alpha / α 1 (ii) Glycosidic; Reject references to α(1-4) glycosidic bond, but allow beta 1-4, or unspecified reference to 1-4 (1,4) 1 (iii) OH / hydroxyl / HO; Reject hydroxide Reject OH / HO molecule Ignore alcohol 1 (b) (i) Starch Cellulose 1. (1,4 and) 1,6 bonds / contains 1,6 bonds / branching 1. 1,4 bonds / no 1,6 bonds / unbranched / straight; 2. All glucoses / monomers same 2. Alternate glucoses / monomers
Monomers_PolymersandCarbs.doc.docx