A mutation that causes an increase in function in a tumor suppressor gene would not likely cause cancer, because a tumor suppressor protein
A. normally responds to growth factors.
B. activates a signal transduction pathway.
C. does not promote cell division.
D. inactivates growth factors.
E. normally promotes the cell cycle.
Answer: C
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If the genetic code contained six nucleotides instead of four, and each amino acid were specified by a single codon, how many unique codons would exist?
a. 144 b. 96 c. 216 d. 256
Which nucleotide pairs mark the beginning and end of each intron?
a. GG at the 5’ end, AU at the 3’ end b. AG at the 5’ end, GU at the 3’ end c. GU at the 5’ end, AG at the 3’ end d. GA at the 5’ end, AG at the 3’ end
Discuss various mechanisms by which flowers are pollinated, and the characteristics of flowers that can give you a clue as to its mechanism of pollination
What will be an ideal response?
Surface currents in the ocean typically
A) flow most strongly from west to east in equatorial regions. B) are colder on the western side of continents. C) flow counterclockwise in gyres in the Northern Hemisphere. D) flow unimpeded from east to west just north of Antarctica.