Breathing And Exchange Of Gases Animal Respiration Question 17
Question: The graph shows four dissociation curves.
Which curve represents the oxygen dissociation curve for myoglobin?
Options:
A) I
B) II
C) III
D) IV
Show Answer
Answer:
Correct Answer: A
Solution:
[a] Myoglobin has only one haem group and there can be non-co-operative binding, hence the shape of the dissociation curve is hyperbolic rather than sigmoidal.
Also, myoglobin has a very high affinity for oxygen and does not release oxygen until a very low oxygen tension.
BETA
