Which part of a hemoglobin molecule binds to a molecule of O2?
A. The surface of an ? globin chain
B. The copper atom wedged between an ? and a ? globin chain
C. The iron atom in the center of a heme group
D. The surface of a ? globin chain
E. The hydrophobic pocket between two ? chains
Answer: C
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Suppose an antibody to bindin and sea urchin sperm were mixed together and the mixture was added to eggs. You predict that the antibody-treated sperm will _____
A) fertilize the eggs normally B) fertilize eggs from other species C) not bind to the egg membrane D) not be able to swim toward the egg
The FOXP2 sequences of mice were most different from those of
A. gorillas. B. chimpanzees. C. rhesus monkeys. D. All had the same number of changes from the mouse sequence. E. humans.
Members of this group of protozoa are decomposers responsible for these infectious diseases: giardiasis (gastroenteritis), trichomoniasis (sexually transmitted disease), and trypanosomiasis (sleeping sickness—Trypanosoma gambiense).
A. flagellated protozoa B. sarcodina C. ciliates D. All of these answers are correct.
Oxygen is required for ____________ to take place.
A. the electron transfer system B. light-dependent reactions C. light-independent reactions D. glycolysis