An excess of estrogen like molecules can have which
of the following effects on males?
a. lower sperm production
b. increase hair growth
c. tumor growth on the surface of the testes
d. increased reproduction
e. all of these
Answer: a
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A transcribed region of DNA has a 5' to 3' sequence TTCATGGCGAc. The 5' to 3' sequence of an RNA transcribed from this DNA would be ____
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In which of the following divisions of Archaea would you be most likely to find organisms that flourish in hot, salty environments?
A. Cyanobacteria B. Euryarchaeota C. Thaumarchaeota D. Crenarchaeota
Ingram examined hemoglobin structural variation by breaking down the hemoglobin protein into many fragments by chemical treatment and subjecting the fragments to electrophoresis to separate them in a gel; and then in a second dimension, perpendicular
to the first, he separated them by chromatography. This two-step approach is commonly referred to as __________. A) hybridization B) electrophoretic mobility C) densitometry D) restriction fragment analysis E) peptide fingerprint analysis
These structures are held together by cohesin
A. homologous chromosomes. B. sister chromatids. C. solenoids. D. nucleosomes.