Describe how DNA packing occurs in eukaryotes using the terms nucleosome, 30 nm fiber,
euchromatin, and heterochromatin. Then describe how DNA is packed in prokaryotes.
What will be an ideal response?
In eukaryotes, the linear DNA is packaged at several levels, including nucleosomes, the 30 nm fiber,
and euchromatin/heterochromatin. In prokaryotes, the circular DNA is packaged into a nucleoid region
of the cell and DNA loops are formed via protein interactions.
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You get the latest strain of the flu virus. How will your cytotoxic T cells respond?
A. They will secrete antigens. B. They will directly destroy the virus. C. They will secrete antibodies. D. They will destroy infected host cells. E. They will destroy all host cells.
Which of the following is mismatched?
a. acetylcholine; muscle contraction b. endorphin; pain perception c. norepinephrine; fight-or-flight response d. serotonin; sexual function e. GABA; major inhibitor in the brain
Based on the table above, which type of cookie was the heaviest?
A) Cookies with the most fat B) Cookies with intermediate amount of fat C) Cookies with the least fat D) The amount of fat did not affect the weight of cookies
In the runaway selection simulation, what is not necessary for a trait like turning bias to evolve by sexual selection?
A. variation in turning bias B. preference for size C. at least 2 individuals to compare D. preference for turning bias