Biology 9700 · AS & A Level · Transport mechanisms
Fill in Table 1.1 with tick (✓) marks to show which features belong to each polymer.
Fig. 1.1 is a basic diagram of a phospholipid molecule. Explain how the structure of a phospholipid molecule makes it suitable for its function in cell membranes. You may annotate and label Fig. 1.1 as part of your response.
State two parts of a cell surface membrane other than phospholipid molecules and describe what each does.
This 11-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Award one mark for each accurately completed column for amylopectin, cellulose, RNA and polypeptide, as shown in the table (e.g. glycosidic bonds in amylopectin and cellulose; branched polymer in amylopectin; contains nitrogen in RNA and polypeptide; synthesised from amino acids in polypeptide; found in both plant and animal cells for RNA and polypeptide).” …