In 2003 a French family was studied in which three of four brothers had undeveloped testes, sparse pubic hair, and a lack of sexual development. All three affected men were homozygous for a genetic mutation that prevented puberty
That mutation could possibly be
a defect in any of the following EXCEPT:
A. GPR54 gene.
B. KISS-1 gene.
C. GnRH gene.
D. gonadotropin coding genes (LH and FSH).
E. testosterone gene.
E
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Media that can be used for the isolation of Mycoplasma include:
a. Thayer-Martin agar with vitamin K. b. 5% sheep blood and IsoVitaleX. c. beef or soybean protein with serum and fresh yeast extract. d. hemin and nicotina-mide-adenine-dinucleotide (NAD) sup-plements.
Salvarsan was a drug to treat syphilis developed by
a) Ehrlich. b) Fleming. c) Weizmann. d) Needham.
The _____ can be used to measure whether a substance is an acid or a base.
a. pH paper b. Litmus paper c. Endothermic Reaction d. The water agar e. Blood agar
Which is a combination of physiological and psychological dependence?
Select one: a. tolerance and withdrawal b. increasing a drug to get the same effect and preoccupation with trying to get more drugs c. seizures and craving for cocaine d. the rush of cocaine and the hallucinations of marijuana e. a cocaine binge and a nicotine craving