| Date | November 2009 | Marks available | 2 | Reference code | 09N.3.HL.TZ0.8 |
| Level | Higher level | Paper | Paper 3 | Time zone | TZ0 |
| Command term | Distinguish | Question number | 8 | Adapted from | N/A |
Question
Distinguish between the cell walls of Gram-positive and Gram-negative bacteria using the table below.
Markscheme
Examiners report
Of those answering this option most answered that Gram-positive bacteria have thicker walls that Gram-negative, thus suggesting that Gram-positive bacteria have more peptidoglycan.
Syllabus sections
Option B: Biotechnology and bioinformatics » Option B: Biotechnology and bioinformatics (Core topics) » B.1 Microbiology: organisms in industry
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