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#Question id: 15186
#SCPH01 Biochemistry
Electrophoretic resolution is achieved by adjusting
A. Current
B. Buffer concentration
C. Chemical nature of Buffer
D. Concentration of supporting media
TLS Online TPP Program
#Question id: 8294
#SCPH05 I Biotechnology
The common ancestors of birds and mammals were very early (stem) reptiles, which almost certainly possessed three-chambered hearts (two atria, one ventricle). Birds and mammals, however, are alike in having four-chambered hearts (two atria, two ventricles). The fourchambered hearts of birds and mammals are best described as ________.
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#Question id: 16126
#SCPH06 I Botany
2 You are studying regulation of the yeast enzyme glutamine synthetase (GS), which is encoded by the GLN1 gene. You have isolated two mutants, designated gln2– and gln3–, that give decreased GS activity. Mating of either gln2– or gln3– haploids to wild type produces heterozygous diploids that show normal amounts of GS expression. When you cross either a gln2– or gln3– haploid to a gln1– strain the resulting diploids show normal expression of GS, that could explain the effect of the gln2– and gln3– mutations on the regulation of GLN1.
The GLN1 gene shows a rather complex regulation in response to different amino acids. When either glutamate (glu) or glutamine (gln) is added to the medium, the amount of GS expression diminished and when both glutamate and glutamine are added to the medium GS expression is shut off completely. The effects of different mutants on the response to glu and gln are shown below.
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#Question id: 5609
#SCPH01 Biochemistry
Just before sperm addition, sea urchin eggs are microinjected with a calcium chelator. What event will most likely not takes place after fertilization?
TLS Online TPP Program
#Question id: 2324
#SCPH06 I Botany
Bacterial DNA is located in: