Amino Acid Learning Tools

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How to Use

Select a tool

Choose a tool to see quick instructions and tips.

How to Use — Amino Acid Puzzle

Goal

Drag the correct piece and drop it onto the molecule to complete the structure.

Steps

  1. Select the correct piece from the tray.
  2. Drag & drop it onto the highlighted drop area.
  3. Use Hint if you want to see the target area.
  4. Use Show Answer to reveal the solution (counts as incorrect in Test/Game).

Tips

  • Learning: Practice with hints and explanations.
  • Test: 20 questions, 30s each. Answer reveal = incorrect.
  • Game: Time attack, points + time bonus.

How to Use — Classification Quiz

Goal

Classify amino acids based on side-chain properties (hydrophobic / hydrophilic etc.).

Steps

  1. Choose Click to select or Drag & Drop.
  2. Select difficulty (Easy / Normal / Hard).
  3. Answer all cards and check your result.

Tips

  • Charged groups (Asp/Glu, Lys/Arg/His) are easiest to spot first.
  • –OH, –CONH₂ → usually polar.
  • Hydrocarbon chains / aromatic rings → usually hydrophobic.

How to Use — Amino Name Match

Goal

Learn correspondences between 1-letter, 3-letter, and full names.

Match Mode

  1. Select a pair mode (1⇄3 / 1⇄Full / 3⇄Full).
  2. Tap one card on the left and one on the right to make a pair.
  3. Complete all pairs to finish.

Spelling Practice

  1. Select typing mode (e.g., 3→1, 1→3, Full→1).
  2. Type the answer and press Check.

How to Use — Venn Diagram Quiz

Goal

Place amino acids into overlapping regions based on multiple properties.

Modes

  • Learning: Shows the completed diagram + explanations.
  • Test: 10 random questions.
  • Master: Fill all amino acids.

Recommended thinking order

  1. Charge (Positive / Negative)
  2. Aromatic ring
  3. Aliphatic hydrocarbon
  4. Size (Small / Tiny)
  5. Hydrophobic vs Polar

How to Use — Fischer Quiz

Goal

Identify amino acids from Fischer projections.

Steps

  1. Select answer format (3-letter or Full name).
  2. Select number of questions (10 / 20 / Endless).
  3. Type your answer and press Check.
  4. Use Show Answer if you want to reveal it.

Tips

  • Focus on side chain (R group) shape first.
  • Then confirm amino / carboxyl positions are consistent.

Amino Acid Puzzle

Test Settings

Game (Time Attack)

Score = 10 per correct answer.

Amino Acid Puzzle

LEARN 0 Score: 0/0 Pts: 0
Problem 1 / 20 — Glycine

Select the correct piece and drop it onto the molecule.

Fischer Projection

Fischer projection

Test Result

Your score: 0/0 | Total time: 0.0s

Game Result

Player — Score: 0 | Correct: 0/0 | Avg time: 0.00s

Leaderboard (Top 10)

Classification Quiz

Choose an Answer Mode

Select one option below.

Difficulty

Choose a mode to begin.

Amino Name Match

Match Mode

Tap one card on the left and one on the right to make pairs.

Spelling Practice

Type the correct name.

Amino Name Match

MATCH

Choose a mode from the Amino Name Match menu to begin.

Venn Diagram Quiz

Mode

Learn shows the completed diagram with explanations. Test gives 10 random questions. Master covers all amino acids.

Venn Diagram Quiz

TEST

What is a Venn Diagram?

A Venn diagram visualizes overlapping sets. Each amino acid can belong to multiple properties at the same time (e.g., Small & Polar), so the overlaps show multi-feature classification in a clear, intuitive way.

Meaning of each label

  • Hydrophobic: Side chains that tend to avoid water (nonpolar).
  • Polar: Side chains that interact well with water (polar).
  • Small: Amino acids with relatively small side chains.
  • Tiny: A subset of Small (especially small side chains).
  • Positive: Side chains that are commonly positively charged (basic).
  • Negative: Side chains that are commonly negatively charged (acidic).
  • Aliphatic: Mainly hydrocarbon chains (straight/branched), often hydrophobic.
  • Aromatic: Side chains containing an aromatic ring.

How to solve (a reliable thinking order)

  1. Charge first: If it is charged, decide Positive or Negative.
  2. Aromatic next: If it has an aromatic ring, place it in Aromatic.
  3. Then aliphatic: Hydrocarbon chain → consider Aliphatic.
  4. Check size: Small, and if extremely small, Tiny.
  5. Finally confirm: Hydrophobic vs. Polar, then choose the correct overlap area.

Common mistakes

  • Polar vs Charged: Charged amino acids are a subset of Polar, but not all Polar are charged.
  • Missing Aromatic: Aromatic rings are distinctive—checking this early reduces confusion.
  • Small vs Tiny: Tiny is inside Small; Small does not always mean Tiny.
  • Over-relying on first impressions: Charge/aromatic features can override “looks hydrophobic”.

Tip: Overlaps are normal—amino acids often have multiple properties at once.

Amino Acid

Structure

Fischer Name Quiz

Settings

※Proline is displayed as a standard structural formula, not a Fischer projection, because it has a cyclic structure.

Fischer Name Quiz

Fischer projection

Result