B1 Exam 1 Practice 1

Front

What are epimers?

Back

Epimers are a type of stereoisomer that differ in configuration at only one specific carbon atom.

Front

What amino acid is attached to the heme ring of hemoglobin (Hb)?

Back

Histidine is the amino acid that is attached to the heme ring of hemoglobin.

Front

Which amino acid contains an amide group in its R-group?

Back

Asparagine contains an amide group in its R-group.

Front

What effect does a higher concentration of CO2 have on hemoglobin's affinity for oxygen?

Back

A higher concentration of CO2 decreases hemoglobin's affinity for oxygen.

Front

What is the strongest intermolecular force between glutamate and lysine in a protein?

Back

The strongest intermolecular force between glutamate and lysine in a protein is ionic bonding.

Front

Define the term 'intermolecular forces'.

Back

Intermolecular forces are the forces of attraction or repulsion between neighboring particles (molecules, atoms, or ions).

Front

What is the role of histidine in hemoglobin?

Back

Histidine plays a crucial role in stabilizing the heme group and facilitating oxygen binding and release.

Front

What is the significance of amide groups in amino acids?

Back

Amide groups in amino acids, such as asparagine, contribute to the protein's structure and function through hydrogen bonding.

Front

Explain the concept of affinity in the context of hemoglobin and oxygen.

Back

Affinity refers to the strength of the interaction between hemoglobin and oxygen; higher affinity means hemoglobin holds onto oxygen more tightly.

Front

What type of bonding occurs between charged side chains of amino acids?

Back

Ionic bonding occurs between charged side chains of amino acids, such as between glutamate (negatively charged) and lysine (positively charged).