Which part of a hemoglobin molecule binds to a molecule of O2?
A. the hydrophobic pocket between two a chains
B. the copper atom wedged between an a and a b globin chain
C. the iron atom in the center of a heme group
D. the surface of a b globin chain
E. the surface of an a globin chain
C. the iron atom in the center of a heme group
You might also like to view...
The only known eukaryotic-bacterial symbioses are the two that explain the development of the chloroplast and mitochondria
A. true B. false
The eukaryotic cell cycle is controlled at several points; which of these is not a control point?
A. Cell growth is assessed at the G1 checkpoint. B. Cell growth is assessed at the S checkpoint. C. DNA replication is assessed at the G2 checkpoint. D. Mitosis is assessed at the M checkpoint.
What would happen if the trachea did not have cartilaginous rings?
A) The trachea would collapse. B) Sense of smell would be lost, and food would taste funny. C) Incoming air would not be humidified. D) Incoming air would not undergo filtration.
The bone marrow is where
A. antigen is filtered from the blood. B. antigen is filtered from tissue fluid. C. blood stem cells give rise to immature lymphocytes. D. immune responses to antigen occur. E. T-lymphocytes complete maturation.