Which of the following is an individual protein that can be useful for screening techniques to detect cancer?
a. allele
b. gene
c. biomarker
d. chromosome
c. biomarker
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In humans, which hormone acts to raise the level of circulating blood glucose?
1.Aldosterone 2.Glucagon 3.Glycogen 4.Insulin
Which extraembryonic membrane encloses a fluid-filled sac?
a. yolk sac b. amnion c. chorion d. allantois e. umbilical cord
Which genetic factor confers upon bacteria the ability to undergo conjugation?
a. the F factor b. the sex pilus c. the X factor d. the C factor
Why can the two-locus segregation distorter system in Drosophila exist only when distorter and responder gene are tightly linked?
a. The sensitive allele of the responder gene and the segregation distorter driver allele must al-ways co-occur on the same chromosome. b. Without tight linkage, the "killing" efficiency of the driver allele would be too low. c. The driver allele would reduce its own fitness by committing suicide in some gametes. d. All of the above.