The term amphipathic refers to those molecules that are
A) hydrophilic.
B) hydrophobic.
C) charged at both ends but with opposite charges.
D) nonpolar at both ends.
E) charged at one end and nonpolar at the other.
E) charged at one end and nonpolar at the other.
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In the oceans, sulfur exists primarily as ________, and in rocks and sediments sulfur occurs mostly as ________ and ________
A) hydrogen sulfide (H2S) / gypsum (CaSO4) / elemental sulfur (So) B) hydrogen sulfide (H2S) / sulfate (SO42-) / elemental sulfur (So) C) sulfate (SO42-) / gypsum (CaSO4) / pyrite (FeS2) D) sulfate (SO42-) / sulfide (H2S) / elemental sulfur (So)
The hormone oxytocin stimulates ____
a. meiosis of oogonia b. ovulation c. implantation of the embryo d. development of the fetal heart e. contraction of uterine muscles during childbirth
What do binary fission and mitosis have in common?
a. They both occur in prokaryotic cells. b. They both occur in plant cells. c. They both require DNA replication before cell division. d. They have nothing in common.
Genetic screening can be used to identify all of the following except:a
PKU. b. Tay-Sachs disease. c. Huntington's disease. d. sickle cell anemia. e. serotonin deficiency