Sudan IV, a dye that binds to nonpolar molecules, is used to detect the presence of macromolecules in food. Sudan IV would test positive in the presence of what macromolecule?
A. Starch
B. DNA
C. Hemoglobin
D. Chitin
E. Fats
E
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What might happen to your red blood cells if you were suddenly unable to regulate the solute concentration of your blood and it began to rise?
A. Your blood cells would shrivel because water would move out of the cells via osmosis. B. Your blood cells would stay the same size. C. Your blood cells would enlarge and could rupture because water would move into the cells via osmosis. D. We do not have enough information to answer this question.
The morning-after pill works by ____
a. blocking ovulation or fertilization b. blocking passage of sperm through the female reproductive tract c. blocking passage of sperm through the male reproductive tract d. causing shedding of the endometrial lining and any implanted embryo e. increasing the effectiveness of the acrosomal reaction
Which part of an antibody determines to which epitope it will bind?
A. the two arms of the Y B. disulfide chains C. the heavy chains D. the stem of the Y E. the Fc portion
Adenoviruses are
A. causes of outbreaks among military recruits. B. nonenveloped, double-stranded, DNA viruses. C. causes of conjunctivitis, common cold, and an acute hemorrhagic cystitis in children. D. transmitted by respiratory and ocular secretions. E. All of the choices are correct.