Recent Studies Have Shown That the H-Bond Between the Distal

question 5

Multiple Choice

Recent studies have shown that the H-bond between the distal histidine and oxygen molecule in myoglobin has a strength of ~ 15 kJ/mol, but in hemoglobin, the strength of the bond is only ~8 kJ/mol. What does this suggest about the differences between myoglobin and hemoglobin?

• A)myoglobin binds oxygen more strongly than hemoglobin
• B)hemoglobin binds oxygen more strongly than myoglobin
• C)the iron in myoglobin is more easily oxidized than in hemoglobin
• D)the iron in hemoglobin is more easily oxidized than in myoglobin
• E)none of the above

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Definitions:

Giovani Arnolfini

Likely an error for "Giovanni Arnolfini," who is famously portrayed with his wife in Jan van Eyck’s painting "The Arnolfini Portrait," symbolizing wealth and domestic life in 15th century Bruges.

Man in a Red Turban

A famous 1433 portrait by Jan van Eyck, often thought to be a self-portrait of the artist, notable for its detailed depiction of the subject and the use of oil paint.

Madonna in a Church

An art motif depicting the Virgin Mary inside a church, signifying her revered status in Christianity and often highlighting Gothic or Romanesque architectural elements.

Oil Paints

A medium in painting that uses pigments suspended in oil as the binder, known for its versatility, rich color, and long drying time which allows artists to rework pieces.