Test Prep / CustomExam Practice Test - 04/02/2026

CustomExam Practice Test - 04/02/2026

Amino Acids and Proteins Test Prep10 Questions20 min

Amino Acids and Proteins Test Prep CustomExam

CustomExam Practice Test - 04/02/2026

A practice test for CustomExam

10Questions

20Minutes

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This practice test is designed to help you prepare for the CustomExam exam. It contains 10 questions and has a time limit of 20 minutes.

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Important Questions

What are amino acids?

A:Building blocks of proteins

B:Types of enzymes

C:Part of DNA structure

D:Components of cell membranes

What is the general structure of an L-α-amino acid?

A:NH2, COOH, H, and R-group attached to the same carbon atom

B:NH2, COO-, H, and R-group attached to the same carbon atom

C:NH2, COOH, R, and H attached to the same carbon atom

D:NH2, H, COOH, and R-group attached to the same carbon atom

How are amino acids classified based on their side chains?

A:Aliphatic, Hydroxy, Sulfur-containing, Aromatic

B:Acidic, Basic, Neutral, Polar

C:Aliphatic, Hydroxy, Amino, Aromatic

D:Aliphatic, Hydroxy, Sulfur-containing, Dicarboxylic acid and amides

What is the significance of the side chain (R-group) in amino acids?

A:Determines the unique properties and classification of each amino acid

B:Acts as a catalyst in chemical reactions

C:Forms the backbone of the protein

D:Influences the protein's three-dimensional shape

What are the four levels of protein structure?

A:Primary, Secondary, Tertiary, Quaternary

B:Primary, Secondary, Tertiary, Quinary

C:Primary, Secondary, Quaternary, R-group

D:Primary, Secondary, Tertiary, R-group

What stabilizes the secondary structure of proteins?

A:Hydrogen bonds between the NH and CO groups of the polypeptide chain

B:Disulfide bonds between cysteine residues

C:Ionic bonds between positively and negatively charged amino acids

D:Van der Waals forces between the side chains

What is the role of disulfide bonds in proteins?

A:Stabilize the tertiary structure of proteins

B:Form covalent links between cysteine residues

C:Contribute to the protein's three-dimensional shape

D:All of the above

What are non-polar (hydrophobic) amino acids?

A:Have hydrophobic side chains and are usually buried in the interior of proteins to avoid water

B:Have polar side chains and are usually exposed to water

C:Have both polar and non-polar side chains

D:Have no side chains

What is the primary structure of a protein?

A:The sequence of amino acids in the polypeptide chain, linked by peptide bonds

B:The three-dimensional shape of the protein

C:The arrangement of secondary structures in the protein

D:The overall charge of the protein

What are the properties of amino acids that affect protein characteristics?

A:Solubility, Melting points, Taste, Optical properties

B:Amphoteric nature, Conductivity, pH, Density

C:Solubility, Melting points, Taste, pH

D:Amphoteric nature, Conductivity, pH, Density

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