Proteins that affect the structure of DNA bound to histones without altering histone chemical structure are called:
A. chromatin-remodeling complexes.
B. MRE activator proteins.
C. RISCs.
D. splicing complexes.
E. dicers.
Ans: C. RISCs.
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Removal of which of the following would have the most wide-reaching effect on bodily functions of an adult human?
A. adrenal glands B. pituitary gland C. thyroid gland D. ovaries (in female) or testes (in male)
One type of weak chemical interaction occurs when two molecules having partial electrical charges of opposite polarity form an intermolecular attraction. These interactions are called:
A. ionic bonds. B. hydrogen bonds. C. hydrophobic interactions. D. van der Waals interactions. E. covalent bonds.
The biological species concept emphasizes the ability of individuals to ____
a. adapt to the environment b. have greater longevity c. intermingle with other species d. live in a variety of habitats e. interbreed and produce fertile offspring
In one sense, microevolution is _______________ and macroevolution is _______________.
a. punctuated; random b. process; result c. gradual; punctuated d. result; process e. adaptive; innovative