Exam 7: Protein Function Part I: Myoglobin and Hemoglobin

Consider a hypothetical hemoglobin-like molecule with a Hill coefficient (constant)of 1 and the same p₅₀ value as normal hemoglobin.Choose the statement below that best describes the two proteins.

Hemerythrin and hemocyanin are:

What are the main bonds or forces that stabilize the dimer formed by two myosin heavy chains?

IgG is the most common immunoglobulin in the circulatory system and in the extravascular fluid.It is composed of two light chains and two heavy chains.What is the approximate molecular mass of an IgG molecule?

Hemoglobin is a heterotetramer.How many protomers are present in hemoglobin?

Muscle contraction is directly caused by

Which statement about actin is correct?

Matching -Sickle cell hemoglobin does not form fibers in the ______ form.

Treadmilling refers to

Myoglobin and a single chain of hemoglobin have similar ______ structures.

Carbon monoxide binds to heme:

Muscle contraction is directly caused by

IgG is one of five classes of antibodies that can be produced by our immune system.IgGs have a molecular mass of approximately 150 kDa,what is their subunit composition?

Humoral immunity refers to that part of the immune response that is mediated by

Matching -The ______ model of allosterism requires subunits to change conformation simultaneously.

It appears that the heme group in myoglobin binds the O₂.What is the function of the polypeptide?

The value of n,the Hill constant (coefficient),for hemoglobin is about ______ as great as the value for myoglobin.

Myoglobin's secondary structure is primarily composed of ______________.

Which of the following statements about actin is not true?

Hemoglobin S,the variant responsible for the misshapen red blood cells characteristic of the disease sickle-cell anemia,is potentially advantageous to heterozygotes because it confers some level of resistance to the disease _________.