Question
This tripeptide is synthesized from glutamate, cysteine (SIS-teen), and glycine. For 10 points each:
[10m] Name this prolific antioxidant, a thiol (THY-all) compound that is oxidized to GSSG to neutralize free radicals and reactive oxygen species.
ANSWER: glutathione (gloo-tuh-THY-ohn) [or GSH]
[10e] When oxidized, two glutathione molecules form covalent linkages between atoms of this element on cysteine's side chain. This nonmetal is found in thiols such as those in skunk spray.
ANSWER: sulfur [or S; prompt on disulfide]
[10h] Glutathione is a cofactor for this family of human enzymes that incorporate selenocysteine in their structure, necessitating dietary sources of selenium.
ANSWER: glutathione peroxidases [prompt on GPx]
<June Yin , Science - Biology - Cell/Molecular>
Summary
| 2023 NASAT | 06/17/2023 | Y | 9 | 15.56 | 100% | 44% | 11% |
Data
| Arkansas | Kentucky A | 0 | 10 | 0 | 10 |
| New Jersey A | Asia B | 0 | 10 | 0 | 10 |
| Illinois Orange | Maryland Red | 10 | 10 | 0 | 20 |
| Illinois White | Liberia | 0 | 10 | 0 | 10 |
| Maryland Gold | California | 10 | 10 | 0 | 20 |
| Missouri A | Kentucky B | 10 | 10 | 0 | 20 |
| Illinois Blue | Missouri B | 10 | 10 | 10 | 30 |
| Pennsylvania | New Jersey B | 0 | 10 | 0 | 10 |
| Ohio | Virginia | 0 | 10 | 0 | 10 |