Final answer:
Hemoglobin is the molecule in question, and its shape affects its ability to carry oxygen.
Step-by-step explanation:
The molecule for which shape has an effect on its ability to carry oxygen is Hemoglobin. Hemoglobin is the protein found in red blood cells that binds to oxygen and carries it throughout the body. The structure of hemoglobin allows it to change shape in response to oxygen binding. This shape change facilitates the release of oxygen to the tissues in need.
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