Question
Robert Koch developed his four postulates to describe the causes of this disease. For 10 points each:
[10m] Name this disease. Koch also discovered PPD, a solution of proteins injected under the skin to screen for a wheal response to this disease in the Mantoux test.
ANSWER: tuberculosis [or TB; accept consumption]
[10h] Ziehl and Neelsen built on Koch’s work with the acid-fast stain, which stains bacteria such as M. tuberculosis with carbolfuchsin (“car-bohl-F’YOOK-sin”) and uses this dye as a counterstain. This dye is also used to count live eukaryotic cells, but is less useful for that purpose compared to a “trypan” dye of the same color.
ANSWER: methylene blue [or MB; or methylthioninium chloride; reject “methylene” or “methyl blue”] (Trypan blue only stains dead cells, while methylene blue can also stain live cells.)
[10e] Koch also developed these ubiquitous microbiology devices, which he used to discover M. tuberculosis. Fanny Hesse first proposed using agar gel in these shallow plastic plates.
ANSWER: Petri dishes
<AS, Biology>
Summary
| 2024 ARCADIA at BU | 2024-12-06 | Y | 7 | 15.71 | 100% | 57% | 0% |
| 2024 ARCADIA at Duke | 2024-12-06 | Y | 3 | 16.67 | 100% | 67% | 0% |
| 2024 ARCADIA at Missouri S&T | 2024-12-06 | Y | 2 | 15.00 | 100% | 50% | 0% |
| 2024 ARCADIA Online | 2025-05-17 | Y | 5 | 22.00 | 100% | 80% | 40% |
| 2024 ARCADIA at Penn State | 2024-12-06 | Y | 2 | 15.00 | 100% | 50% | 0% |
| 2024 ARCADIA at Florida Tech | 2024-12-06 | Y | 4 | 12.50 | 100% | 25% | 0% |
| 2024 ARCADIA at UC Berkeley | 2024-12-06 | Y | 2 | 20.00 | 100% | 100% | 0% |
| 2024 ARCADIA at Waterloo | 2024-11-09 | Y | 7 | 18.57 | 100% | 86% | 0% |
| 2024 ARCADIA at GT | 2024-12-06 | Y | 4 | 15.00 | 75% | 75% | 0% |
| 2024 ARCADIA at Illinois | 2024-11-09 | Y | 4 | 20.00 | 100% | 100% | 0% |
| 2024 ARCADIA at Warwick | 2024-12-06 | Y | 5 | 16.00 | 100% | 20% | 40% |
| 2024 ARCADIA at Claremont | 2024-11-02 | Y | 3 | 20.00 | 100% | 33% | 67% |
Data
| Toronto Chestnut Rice and Kamehameha | Carleton A | 0 | 0 | 10 | 10 |
| Waterloo Aspidistra | Ottawa Absolomabsolomabsolom | 10 | 0 | 10 | 20 |
| Waterloo Aspidistra | Ottawa Absolomabsolomabsolom | 10 | 0 | 10 | 20 |
| Waterloo Aspidistra | Ottawa Absolomabsolomabsolom | 10 | 0 | 10 | 20 |
| Waterloo Aspidistra | Ottawa Absolomabsolomabsolom | 10 | 0 | 10 | 20 |
| Waterloo Aspidistra | Ottawa Absolomabsolomabsolom | 10 | 0 | 10 | 20 |
| Waterloo Aspidistra | Ottawa Absolomabsolomabsolom | 10 | 0 | 10 | 20 |
| Waterloo Aspidistra | Ottawa Absolomabsolomabsolom | 10 | 0 | 10 | 20 |
| Waterloo Aspidistra | Ottawa Absolomabsolomabsolom | 10 | 0 | 10 | 20 |
| Toronto B | McMaster ApocolocyntosisBidii | 10 | 0 | 10 | 20 |
| Toronto Disband the Club 2k24 | Toronto A | 10 | 0 | 10 | 20 |
| McGill A | Waterloo Basic | 10 | 0 | 10 | 20 |
| Waterloo Cloze | Toronto Metropolitan A | 10 | 0 | 10 | 20 |