Join thousands of students who trust us to help them ace their exams!Watch the first video
Multiple Choice
Which of the following curves is representative of the binding of oxygen to hemoglobin?
A
Sigmoidal curve
B
Exponential curve
C
Linear curve
D
Hyperbolic curve
Verified step by step guidance
1
Understand the concept of oxygen binding to hemoglobin: Hemoglobin is a protein in red blood cells that carries oxygen. Its ability to bind oxygen is influenced by various factors, including the partial pressure of oxygen.
Recognize the nature of hemoglobin's oxygen binding: Hemoglobin exhibits cooperative binding, meaning the binding of one oxygen molecule increases the affinity for the next oxygen molecule.
Identify the characteristic curve: Cooperative binding results in a sigmoidal (S-shaped) curve when plotting the percentage saturation of hemoglobin against the partial pressure of oxygen.
Differentiate between curve types: A sigmoidal curve is distinct from an exponential curve (which rises sharply), a linear curve (which is a straight line), and a hyperbolic curve (which rises quickly and then plateaus).
Conclude that the sigmoidal curve is representative of the cooperative nature of oxygen binding to hemoglobin, reflecting the increased affinity as more oxygen molecules bind.