Mastering the Basics of the 20 Essential Amino Acids Quiz

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| Attempts: 13 | Questions: 19 | Updated: Aug 4, 2025
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1. What is the classification of histidine based on its properties?

Explanation

Histidine is classified as BASIC-POLAR due to its basic (positively charged at neutral pH) and polar nature, which makes it essential for protein structure and function.

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About This Quiz
Mastering The Basics Of The 20 Essential Amino Acids Quiz - Quiz

Explore the essential building blocks of proteins through this focused examination of the 20 different types of amino acids. Enhance your understanding of their unique functions and roles in biological systems, crucial for anyone studying or working in the field of biochemistry.

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2. Which of the following best describes the property of GLYCINE?

Explanation

Glycine is the simplest amino acid and is considered neutral and nonpolar in nature, making it hydrophobic and non-reactive with charges.

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3. What is the classification of Glutamic Acid based on its properties?

Explanation

Glutamic Acid is classified as ACIDIC-POLAR due to its acidic nature and polar side chain.

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4. What is the classification of the amino acid TYROSINE?

Explanation

Tyrosine is classified as a neutral-polar amino acid due to its non-charged side chain containing a hydroxyl group, making it hydrophilic.

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5. What is the polarity of threonine?

Explanation

Threonine is an amino acid that is classified as neutral-polar due to its side chain containing a hydroxyl group which can participate in hydrogen bonding.

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6. What type of amino acid is SERINE?

Explanation

Serine is classified as a neutral-polar amino acid due to its uncharged polar side chain.

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7. What type of amino acid is ISOLEUCINE?

Explanation

Isoleucine is classified as a neutral-nonpolar amino acid due to its side chain containing a methyl group, making it hydrophobic and non-reactive in nature.

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8. What is the polarity of the amino acid Glutamine?

Explanation

Glutamine is a neutral-polar amino acid, meaning it is not charged and has both hydrophobic and hydrophilic properties.

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9. What is the chemical property of CYSTEINE?

Explanation

Cysteine contains a thiol group which is neutral-slightly polar in nature, making it different from acidic, basic, and nonpolar amino acids.

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10. Which of the following best describes ASPARTIC ACID?

Explanation

ASPARTIC ACID is an amino acid that is both acidic and polar in nature, making it ACIDIC-POLAR.

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11. What type of amino acid is ARGININE?

Explanation

ARGININE is classified as a BASIC-POLAR amino acid due to its basic properties and polarity. It is positively charged at physiological pH and is hydrophilic in nature, making it an essential component in certain biochemical processes.

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12. What is the classification of the amino acid ALANINE?

Explanation

Alanine is classified as a neutral-nonpolar amino acid due to its nonpolar side chain and overall neutral charge.

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13. What is the polarity of the amino acid Tryptophan?

Explanation

Tryptophan is considered neutral-slightly polar due to its aromatic ring and the presence of a nitrogen atom within its side chain, which can participate in hydrogen bonding.

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14. What does the abbreviation PRO stand for in the field of chemistry?

Explanation

In chemistry, the abbreviation PRO in PROLINE stands for NEUTRAL-NONPOLAR, which is an important amino acid commonly found in proteins.

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15. What is the polarity of PHENYLALANINE?

Explanation

Phenylalanine is a neutral nonpolar amino acid due to its benzyl side chain containing a hydrophobic phenyl group.

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16. What is the general classification of LYSINE based on its chemical properties?

Explanation

LYSINE is a basic amino acid with a polar side chain, making it fall under the category of BASIC-POLAR in terms of chemical properties.

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17. What is the classification of LEUCINE based on its polarity?

Explanation

LEUCINE is a neutral nonpolar amino acid due to its aliphatic hydrophobic side chain, making it hydrophobic and nonpolar in nature.

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18. What is the classification of ASPARAGINE based on its chemical properties?

Explanation

Asparagine is classified as neutral-polar due to its nonpolar R group and polar side chain that contains an amide functional group.

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19. What is the classification of VALINE based on its side chain?

Explanation

Valine is classified as Neutral-Nonpolar due to its uncharged side chain consisting of only hydrocarbon groups, making it nonpolar in nature.

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What is the classification of histidine based on its properties?
Which of the following best describes the property of GLYCINE?
What is the classification of Glutamic Acid based on its properties?
What is the classification of the amino acid TYROSINE?
What is the polarity of threonine?
What type of amino acid is SERINE?
What type of amino acid is ISOLEUCINE?
What is the polarity of the amino acid Glutamine?
What is the chemical property of CYSTEINE?
Which of the following best describes ASPARTIC ACID?
What type of amino acid is ARGININE?
What is the classification of the amino acid ALANINE?
What is the polarity of the amino acid Tryptophan?
What does the abbreviation PRO stand for in the field of chemistry?
What is the polarity of PHENYLALANINE?
What is the general classification of LYSINE based on its chemical...
What is the classification of LEUCINE based on its polarity?
What is the classification of ASPARAGINE based on its chemical...
What is the classification of VALINE based on its side chain?
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