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Biology /Amino Acids and Proteins

Amino Acids and Proteins

Biology10 CardsCreated 2 months ago

This deck covers the basic concepts of amino acids and proteins, including their structure, classification, and properties. It also explores the different levels of protein structure and the chemical reactions involving amino acids.

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What are amino acids?

Amino acids are small units or monomers of proteins, made up of up to 20 standard amino acids in different sequences and numbers.

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Key Terms

Term

Definition

What are amino acids?

Amino acids are small units or monomers of proteins, made up of up to 20 standard amino acids in different sequences and numbers.

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

An L-α-amino acid has an amino group (–NH2), a carboxylic acid group (–COOH), a hydrogen atom, and a variable side chain (R-group) attached to the α-c...

How are amino acids classified based on their side chains?

Amino acids are classified as aliphatic, hydroxy, sulfur-containing, dicarboxylic acid and their amides, diamino, aromatic, and imino acids based on t...

What are non-polar (hydrophobic) amino acids?

Non-polar amino acids have hydrophobic side chains and are usually buried in the interior of proteins to avoid water. Examples include Glycine, Alanin...

What role do polar, uncharged amino acids play in proteins?

Polar, uncharged amino acids are involved in hydrogen bonding, enzyme active sites, and cell signaling. They are often found on the outer surfaces of ...

What is the primary structure of a protein?

The primary structure is the sequence of amino acids in a protein, linked by peptide bonds, forming a polypeptide chain.

Describe the secondary structure of proteins.

The secondary structure involves the folding or twisting of the polypeptide chain into α-helices or β-pleated sheets, stabilized by hydrogen bonds.

What stabilizes the tertiary structure of proteins?

The tertiary structure is stabilized by hydrogen bonds, hydrophobic interactions, Van der Waals forces, disulfide bonds, and ionic bonds.

What is the quaternary structure of proteins?

The quaternary structure refers to the arrangement and interaction of multiple polypeptide subunits in a protein, stabilized by noncovalent interactio...

What is the significance of the isoelectric point (pI) of amino acids?

The isoelectric point is the pH at which an amino acid carries no net charge, affecting its solubility and mobility in an electric field.

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Amino Acids and Proteins

Term	Definition
What are amino acids?	Amino acids are small units or monomers of proteins, made up of up to 20 standard amino acids in different sequences and numbers.
What is the general structure of an L-α-amino acid?	An L-α-amino acid has an amino group (–NH2), a carboxylic acid group (–COOH), a hydrogen atom, and a variable side chain (R-group) attached to the α-carbon.
How are amino acids classified based on their side chains?	Amino acids are classified as aliphatic, hydroxy, sulfur-containing, dicarboxylic acid and their amides, diamino, aromatic, and imino acids based on their side chains.
What are non-polar (hydrophobic) amino acids?	Non-polar amino acids have hydrophobic side chains and are usually buried in the interior of proteins to avoid water. Examples include Glycine, Alanine, and Valine.
What role do polar, uncharged amino acids play in proteins?	Polar, uncharged amino acids are involved in hydrogen bonding, enzyme active sites, and cell signaling. They are often found on the outer surfaces of proteins.
What is the primary structure of a protein?	The primary structure is the sequence of amino acids in a protein, linked by peptide bonds, forming a polypeptide chain.
Describe the secondary structure of proteins.	The secondary structure involves the folding or twisting of the polypeptide chain into α-helices or β-pleated sheets, stabilized by hydrogen bonds.
What stabilizes the tertiary structure of proteins?	The tertiary structure is stabilized by hydrogen bonds, hydrophobic interactions, Van der Waals forces, disulfide bonds, and ionic bonds.
What is the quaternary structure of proteins?	The quaternary structure refers to the arrangement and interaction of multiple polypeptide subunits in a protein, stabilized by noncovalent interactions.
What is the significance of the isoelectric point (pI) of amino acids?	The isoelectric point is the pH at which an amino acid carries no net charge, affecting its solubility and mobility in an electric field.