The use of birth control pills (oral contraceptives) _____
A) reduces the incidence of ovulation
B) prevents fertilization by keeping the sperm and egg physically separated by a mechanical barrier
C) prevents implantation of an embryo
D) prevents sperm from exiting the male urethra
E) prevents oocytes from entering the uterus
Answer: A
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Which of the following is not a polymer of numerous monomer units?
A) lipids B) proteins C) nucleic acids D) carbohydrates E) starch
Chemical bonds that are formed when one atom with a partial positive charge (created from unequal
sharing of electrons) is electrically attracted to another atom with a partial negative charge (also created from unequal sharing of electrons) are called ____.
a. polar covalent bonds b. van der Waals forces c. ionic bonds d. hydrogen bonds e. nonpolar covalent bonds
Avocado sunblotch is caused by a
A) bacterium. B) prion. C) virus. D) viroid. E) fungus.
Which of the following processes describes the formation of a complementary RNA molecule?
A) replication B) mosaicism C) mutation D) transcription E) translation