You have developed a promising anti cancer agent, but it has poor solubility in water. Which of the following changes should improve water solubility?
A.) adding a methyl group
B.) increasing the size of the drug
C.) adding a hydroxyl group
D.) adding a carboxyl group
Ans:
C.) adding a hydroxyl group
D.) adding a carboxyl group
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The type of reproductive isolation in which two populations are separated due to the sperm cells of one not being able to fertilize the egg cells of the other is
A. ecological isolation. B. hybrid infertility. C. gametic isolation. D. hybrid inviability. E. temporal isolation.
During menopause, ____.
A. estrogen levels rise B. menstruation increases C. ovulation ceases D. women experience chills E. weight loss is typical
Microevolution represents:
A. changes that occur within a biological population that are easily observed B. large-scale evolutionary changes that result in the origin of new species C. changes that occur slowly over long periods of time D. the processes that cannot be easily observed
Jonas Salk developed a(n) (attenuated/inactivated/subunit) polio vaccine in 1955.
Fill in the blank(s) with the appropriate word(s).