| Date | November 2012 | Marks available | 3 | Reference code | 12N.3.SL.TZ0.5 |
| Level | Standard level | Paper | Paper 3 | Time zone | TZ0 |
| Command term | Draw | Question number | 5 | Adapted from | N/A |
Question
Draw a labelled diagram to show the structure of a sarcomere in striated muscle.
Markscheme
Award [1] for each structure clearly drawn and correctly labelled.
Z lines;
thin actin filaments shown attached to Z lines;
thick myosin filaments with heads;
(two) light bands and dark bands;
Award [2 max] for a poorly drawn or inaccurate diagram.
Examiners report
Many candidates were able to get 3 marks for the diagram of the sarcomere in (b), although some poor diagrams were seen; very good diagrams were rare.
