Science quiz
Amino acids from their three letter codes
Every amino acid has a three letter symbol. Most are the first three letters of the name, with four exceptions waiting to catch you out.
- Format
- Type them all
- Items
- 20 answers
- Limit
- 4:00
- Level
- Medium
- Checked
- 2026.10.03
- Answers
- 20
- Time limit
- 4:00
- Order
- One at a time, skip allowed
- Matching
- Case and accents ignored
- The highlighted slot is the one to answer.
- Prev and Next skip around; click a slot to jump to it.
- Enter on an empty box skips; the up and down arrow keys step through the slots.
- Pause whenever you like (Esc). The board hides while the clock is stopped.
Name the amino acid for each three letter code.
| Symbol | Amino acid |
|---|---|
| Ala | Not found yet |
| Arg | Not found yet |
| Asn | Not found yet |
| Asp | Not found yet |
| Cys | Not found yet |
| Gln | Not found yet |
| Glu | Not found yet |
| Gly | Not found yet |
| His | Not found yet |
| Ile | Not found yet |
| Symbol | Amino acid |
|---|---|
| Leu | Not found yet |
| Lys | Not found yet |
| Met | Not found yet |
| Phe | Not found yet |
| Pro | Not found yet |
| Ser | Not found yet |
| Thr | Not found yet |
| Trp | Not found yet |
| Tyr | Not found yet |
| Val | Not found yet |
About this quiz
The 20 standard amino acids are the building blocks that cells join into proteins. Each has an agreed three letter symbol and a one letter symbol used for writing long sequences.
- Sixteen symbols are the first three letters of the name.
- The four exceptions are Asn for asparagine, Gln for glutamine, Ile for isoleucine and Trp for tryptophan.
- Asp and Glu are also known as aspartate and glutamate, and both names are accepted.
More quizzes like this
| No. | Quiz | Section | Format | Items | Added |
|---|---|---|---|---|---|
| 01 | Amino acids from their one letter codes Name each of the 20 standard amino acids from its one letter code, from A for alanine to W, Y and the other letters that do not match. Science / Type them all / 20 answers | Science | Type them all | 20 | 2026.10.03 |
| 02 | The 20 amino acids: essential and nonessential Name all 20 standard amino acids, sorted into the nine essential ones the body cannot make and the eleven nonessential ones it can. Science / Type them all / 20 answers | Science | Type them all | 20 | 2026.10.03 |
| 03 | Amino acids: essential or nonessential? The 20 standard amino acids, one at a time. Must the body get it from food, or can the body make it? Click essential or nonessential. Science / Sort into groups / 20 to sort | Science | Sort into groups | 20 | 2026.10.03 |