2/2 chapt 5 bchm MC only

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Questions and Answers

According to the text, what does a Hill coefficient (nH) value of 1 indicate?

Ligand binding is not possible
Ligand binding is not cooperative (correct)
Positive cooperativity
Negative cooperativity

According to the text, what does a Hill coefficient (nH) value greater than 1 indicate?

Negative cooperativity
Positive cooperativity (correct)
Ligand binding is not cooperative
Ligand binding is not possible

According to the text, what does a Hill coefficient (nH) value less than 1 indicate?

Positive cooperativity
Negative cooperativity (correct)
Ligand binding is not cooperative
Ligand binding is not possible

According to the text, what is the MWC model also known as?

Concerted model (A) Signup and view all the answers

According to the text, what is the sequential model also known as?

Sequential model (D) Signup and view all the answers

According to the text, what is the function of carbonic anhydrase in relation to CO2 and pH?

Catalyzes the hydration of CO2 to bicarbonate (D) Signup and view all the answers

Which type of antibody preparation contains a mixture of antibodies that recognize different parts of a protein?

Polyclonal antibodies (B) Signup and view all the answers

Which type of antibody preparation is synthesized by a population of identical B cells and recognizes the same epitope?

Monoclonal antibodies (A) Signup and view all the answers

Which proteins are the major components of muscle?

Actin and myosin (B) Signup and view all the answers

What is the structure of thick filaments in muscle?

Rodlike structures of aggregated myosin (A) Signup and view all the answers

What is the structure of thin filaments in muscle?

F-actin along with troponin and tropomyosin (C) Signup and view all the answers

What is the attachment site for thin filaments in muscle?

Z disk (A) Signup and view all the answers

Which class of antibodies is the major class and one of the most abundant blood serum proteins?

IgG (D) Signup and view all the answers

What is the function of memory cells in the immune response?

Permit a rapid response to pathogens previously encountered (A) Signup and view all the answers

What is the purpose of vaccines?

Teach the immune system what the viral particles look like (A) Signup and view all the answers

Which protein blocks the myosin-binding sites on the thin filament?

Tropomyosin (A) Signup and view all the answers

What is the role of T lymphocytes in the immune response?

Destroy infected host cells (A) Signup and view all the answers

What is the role of troponin in muscle contraction?

Causes a conformational change and exposes myosin-binding sites (A) Signup and view all the answers

What is the function of antibodies in the immune response?

Bind bacteria, viruses, or large molecules identified as foreign (C) Signup and view all the answers

What is the role of subunit C in troponin?

Binds Ca2+ (A) Signup and view all the answers

What is the purpose of the humoral immune system?

Target bacterial infections and extracellular viruses (A) Signup and view all the answers

What is the function of skeletal muscle?

Binding and catalysis (D) Signup and view all the answers

What type of protein is myosin?

Actin-binding protein (A) Signup and view all the answers

Is actin-myosin interaction reversible or irreversible?

Reversible (A) Signup and view all the answers

Which of the following describes the Bohr effect?

The effect of pH and [CO2] on the binding and release of O2 by hemoglobin (A) Signup and view all the answers

Which of the following is true about the binding of H+ and CO2 to hemoglobin?

The binding of H+ and CO2 is inversely related to the binding of O2 (A) Signup and view all the answers

What is the role of 2,3-Bisphosphoglycerate (BPG) in the regulation of oxygen binding to hemoglobin?

It decreases the affinity of hemoglobin for oxygen (B) Signup and view all the answers

How does sickle cell anemia differ from normal hemoglobin?

Sickle cell anemia forms polymers upon deoxygenation (B) Signup and view all the answers

What is the effect of BPG on oxygen binding to hemoglobin at high altitudes?

BPG increases at high altitudes (C) Signup and view all the answers

What is the role of fetal hemoglobin in oxygen binding?

Fetal hemoglobin has a higher affinity for oxygen (A) Signup and view all the answers

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