23 2 points Binding of ____ to two subunits of ____ effectively prevents any O2 from binding by remaining subunits. oxygen, myoglobin oxygen, hemoglobin CO, hemoglobin CO, myoglobin
Added by Mike B.
Close
Step 1
Step 1: The binding of CO to hemoglobin prevents any O2 from binding by remaining subunits. Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 57 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Carbon monoxide (CO) binds to myoglobin and causes it to denature. is rapidly converted to CO2 leading to O2 release. binds to the globin portion of hemoglobin and prevents the binding of O2. binds to the Fe in hemoglobin and prevents the binding of O2. binds to the heme portion of hemoglobin and causes heme to unbind from hemoglobin.
Adi S.
Determine which statements apply to hemoglobin, myoglobin, or neither. Hemoglobin Myoglobin Neither Answer Bank Carbon monoxide binds at an allosteric site, lowering oxygen binding affinity. Oxygen binds irreversibly to this molecule. The binding pattern for this molecule is considered cooperative. This molecule has a greater affinity for oxygen. The oxygen dissociation curve is hyperbolic in shape. As oxygen binds to this molecule the shape of the molecule changes, enhancing further oxygen binding. This molecule delivers oxygen more efficiently to tissues. The oxygen dissociation curve is sigmoidal in shape ("S"-shaped).
Carbon monoxide is a colorless, odorless gas that binds to hemoglobin at an oxygen-binding site. Indeed, it binds 200 times as tightly as oxygen, accounting for its toxic nature. Even if only one of the four oxygen-binding sites on hemoglobin is occupied by carbon monoxide and the remaining three are bound to oxygen, oxygen is not released. Explain. Fetal hemoglobin (HbF) contains a Ser in place of a His at position 143 of the Ě chains of adult hemoglobin (HbA). Residue 143 faces the central cavity between the Ě chains. a) What is the difference between the functional groups of the side chain Ser versus His? b) Why does 2,3-BPG bind more tightly to deoxy HbA than to deoxy HbF? c) How does the decreased affinity of HbF for 2,3-BPG affect the affinity of HbF for O2? (lower or higher)
Sri K.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD