Which one of the following sexually transmitted diseases is currently the most prevalent in the United States?
A) gonorrhea
B) syphilis
C) AIDS
D) genital warts
E) chlamydia
E
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A mouse line that lacks a specific gene in order to study the effects of the absence of said gene is called called a(n) ________.
A) transgenic B) chimera C) knockout D) clone E) mosaic
Wegener first presented the idea of continental drift in 1920 and this theory was confirmed in 1960.
Answer the following statement true (T) or false (F)
In 1952, Hershey and Chase confirmed Avery's (1944) conclusion that
A. DNA is the repository for hereditary information. B. the replication of DNA is semiconservative. C. RNA is the repository for hereditary information. D. each DNA molecule is composed of two strands that are twisted into a double helix. E. proteins are the repositories for hereditary information.
Magnesium chloride is a salt formed with ionic bonds between one magnesium ion and two chloride ions. Magnesium has two electrons in its outer shell and chlorine has seven electrons in its outer shell. How are the electrons transferred between these atoms?
A. Both magnesium and chlorine are reduced. B. Magnesium is oxidized and chlorine is reduced. C. Both magnesium and chlorine are oxidized. D. Chlorine is oxidized and magnesium is reduced.