AP Biology Unit 1 Review

Front

What are ionic attractions in proteins?

Back

Ionic attractions in proteins occur between positively and negatively charged R groups of amino acids, stabilizing the protein structure.

Front

What is adhesion in the context of molecular interactions?

Back

Adhesion occurs when molecules stick to each other, often facilitated by hydrogen bonds.

Front

What is the secondary structure of a protein?

Back

The secondary structure of a protein refers to the local folding patterns, such as α-helices and β-pleated sheets, stabilized by hydrogen bonds.

Front

What is a hydrogen bond?

Back

A hydrogen bond is a weak attraction between a hydrogen atom covalently bonded to an electronegative atom and another electronegative atom.

Front

What does the primary sequence of a protein refer to?

Back

The primary sequence of a protein refers to the specific order of amino acids in the polypeptide chain.

Front

What is the difference between primary and secondary protein structure?

Back

Primary structure is the linear sequence of amino acids, while secondary structure involves local folding patterns like α-helices and β-pleated sheets.

Front

What role do hydrogen bonds play in water's properties?

Back

Hydrogen bonds between water molecules contribute to water's high surface tension, boiling point, and solvent capabilities.

Front

What is the significance of R groups in amino acids?

Back

R groups determine the chemical properties and functions of amino acids, influencing protein structure and function.

Front

How do ionic bonds differ from covalent bonds?

Back

Ionic bonds involve the transfer of electrons and attraction between charged ions, while covalent bonds involve the sharing of electrons.

Front

What is tertiary structure in proteins?

Back

Tertiary structure refers to the overall 3D shape of a protein, formed by interactions among R groups and between R groups and the peptide backbone.