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Amino Acids Trivia Quiz

This quiz will test your knowledge of the names, properties, and structures of the 20 amino acids. All amino acids contain an alpha carbon bonded to 4 groups: a hydrogen (H) atom, a carboxyl group (-COOH), an amino group (-NH3) and a side chain "R".

A multiple-choice quiz by danway07. Estimated time: 3 mins.

Author
danway07

Time
3 mins

Type
Multiple Choice

Quiz #
242,205

Updated
Dec 03 21

# Qns
10

Difficulty
Average

Avg Score
6 / 10

Plays
4501

Last 3 plays: Guest 128 (2/10), Guest 86 (10/10), Guest 94 (5/10).

One at a Time - Single Page - Timed Game

Question 1 of 10

1. Which of the following amino acids is the smallest of all amino acids? Hint

Serine

Alanine

Glycine

Valine

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Question 2 of 10

2. Which of the following amino acids can form a special covalent bond called a disulfide bond? Hint

Methionine

Cysteine

Lysine

Tyrosine

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Question 3 of 10

3. Which of the following amino acids is actually an imino acid? Hint

Alanine

Proline

Tryptophan

Glutamic acid

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Question 4 of 10

4. Which of the following amino acids is the largest of all the amino acids? Hint

Tyrosine

Tryptophan

Histidine

Glutamic acid

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Question 5 of 10

5. Which of the following amino acids is NOT positively charged? Hint

Lysine

Histidine

Arginine

Aspartic acid

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Question 6 of 10

6. The three letter abbreviation "asn" corresponds to which amino acid? Hint

Aspartic acid

Alanine

Arginine

Asparagine

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Question 7 of 10

7. Of amino acids abbreviated "Lys", "Glu", "Trp", and "Gln", which is a basic amino acid with a positive charge? Hint

Glutamic acid

Lysine

Tryptophan

Glutamine

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Question 8 of 10

8. Which of the following amino acids' side chains is a single methyl group? Hint

Isoleucine

Valine

Alanine

Leucine

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Question 9 of 10

9. Which two of the following amino acids could form a ionic bond? Hint

Aspartic acid and Lysine

Arginine and Glutamine

Glutamic acid and Valine

Proline and Glycine

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Question 10 of 10

10. Which of the following amino acid(s) are polar? Hint

All of these

Tyrosine

Serine

Arginine

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Quiz Answer Key and Fun Facts

1. Which of the following amino acids is the smallest of all amino acids?

Answer: Glycine

Each amino acid, aside from its name, has a three letter abbreviation and a one letter code. Glycine, gly, or G, is the smallest amino acid and fits in the non-polar group. Its "R" side chain is simply a hydrogen atom. Small amino acids are more commonly included in proteins than larger and more bulky amino acids.

2. Which of the following amino acids can form a special covalent bond called a disulfide bond?

Answer: Cysteine

Cysteine, cys, or C, is a sulfur containing non-polar amino acid. Two cysteine residues containing -SH groups form very stable covalent bonds called disulfides which stabilize and give structure to protein. Although methionine contains sulfur, it cannot form disulfide bonds.

3. Which of the following amino acids is actually an imino acid?

Answer: Proline

Proline, pro, or P, has three methyl groups that attach to both the alpha carbon and the amino group forming a ring structure. An imino acid is any compound that contains both an imino (>C=NH) group and a carboxyl (-COOH) group.

4. Which of the following amino acids is the largest of all the amino acids?

Answer: Tryptophan

Tryptophan, trp, or W, is a member of the non-polar and aromatic group. Aromatic compounds contain one or more ring structures. As a large and bulky amino acid, it is less commonly included in proteins.

5. Which of the following amino acids is NOT positively charged?

Answer: Aspartic acid

Aspartic acid, asp or D, is an acidic and negatively charged amino acid that contains a carboxyl (-COO) group. Lysine, arginine and histidine are all basic amino acids and contain a positively charged -NH3 group.

6. The three letter abbreviation "asn" corresponds to which amino acid?

Answer: Asparagine

Asparagine, asn or N, is a polar amino acid which contains an amide (R-C(=O)-N-R) group. Alanine has the abbreviation Ala, arginine is Arg, and aspartic acid is Asp.

7. Of amino acids abbreviated "Lys", "Glu", "Trp", and "Gln", which is a basic amino acid with a positive charge?

Answer: Lysine

Lysine is abbreviated "lys" and oddly enough has the code "K". The code "L" is used by leucine.

8. Which of the following amino acids' side chains is a single methyl group?

Answer: Alanine

Alanine, ala or A, is a small non-polar amino acid and has a methyl, -CH3, group.

9. Which two of the following amino acids could form a ionic bond?

Answer: Aspartic acid and Lysine

An ionic bond will form between positively charged and negatively charged amino acids. Aspartic acid, asp, or D, is a negatively charged acidic amino acid while lysine, lys, or K, is a positively charged basic amino acid.

10. Which of the following amino acid(s) are polar?

Answer: All of these

Serine, ser, or S, and tyrosine, tyr, or Y, both contain a hydroxyl (-OH) group. Arginine, arg, or R, is a basic and positively charged amino acid. Of the 20 amino acids, 10 are polar and 10 are non-polar. Polar molecules are named so because they contribute either a positive or negative charge.

Source: Author danway07

This quiz was reviewed by FunTrivia editor crisw before going online.
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