| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| Linus Pauling used X-ray crystallography to study the patterns of keratin in this body part | hair | $1,000 | J | EASY MOLECULAR BIOLOGY | 2011-04-11 | #6126 | |
| Linus Pauling found the structure of keratin, the main component of nails & this human body part | hair | $800 | J | BIOLOGY | 2007-11-23 | #5340 |