p53 is a tumor suppressor gene that acts as a sensor of DNA damage.
Answer the following statement true (T) or false (F)
True
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Which of the following is not true about the G + C content percentages in DNA of organisms?
A. Similar G + C percentages only suggests relatedness if the two organisms are also alike phenotypically. B. Organisms with different G + C percentages have dissimilar base sequences. C. Organisms with similar G + C percentages have similar base sequences. D. All of the choices are correct.
Blastocyst cells that give rise to the embryo's body constitute the
A) blastomere. B) inner cell mass. C) outer cell mass. D) mesoderm.
Which of the following would have the most difficulty entering a water lattice?
a. table salt (NaCl) b. a nonpolar molecule c. a sodium ion d. a proton (H+) e. an electron
Sympatric speciation through polyploidy is a
frequent phenomenon in a. insects. b. mammals. c. bacteria. d. plants. e. protists.