Question
An extremely salt-tolerant group of these organisms performs photosynthesis using retinal instead of chlorophyll. For 10 points each:
[10e] Name this domain of prokaryotic (pro-carry-AH-tik) microbes that are contrasted with bacteria.
ANSWER: archaea (ar-KEE-uh) [or archaeans; or haloarchaea]
[10h] Those haloarchaea (ha-lo-ar-KEE-uh) transport protons across their membrane using a "microbial" form of this retinal-containing protein, which is given a nickname referencing its violet color.
ANSWER: rhodopsin [or microbial rhodopsin or bacteriorhodopsin; prompt on visual purple]
[10m] Unrelated "purple bacteria" can perform photosynthesis using this molecule as an electron donor, instead of water. Giant tube worms harbor symbiotic bacteria that metabolize this molecule.
ANSWER: hydrogen sulfide [or H2S; or sulfide]
<June Yin , Science - Biology - Cell/Molecular>
Summary
| 2023 NASAT | 06/17/2023 | Y | 9 | 20.00 | 100% | 56% | 44% |
Data
| Asia A | Missouri A | 10 | 10 | 10 | 30 |
| New Jersey B | Asia B | 10 | 0 | 0 | 10 |
| Illinois Blue | Illinois White | 10 | 10 | 10 | 30 |
| Kentucky A | California | 10 | 0 | 0 | 10 |
| Kentucky B | Missouri B | 10 | 0 | 0 | 10 |
| Pennsylvania | Liberia | 10 | 0 | 10 | 20 |
| Maryland Red | New Jersey A | 10 | 10 | 0 | 20 |
| Illinois Orange | Ohio | 10 | 10 | 10 | 30 |
| Virginia | Arkansas | 10 | 0 | 10 | 20 |