The allantois

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#Question id: 2068

#SCPH05 I Biotechnology

Which of the following molecules dramatically increases the rate of diffusion of water across cell membranes?

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#Question id: 2280

#SCPH01 Biochemistry

The smooth ER is especially abundant in cells that synthesize extensive amounts of

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#Question id: 16126

#SCPH01 Biochemistry

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: 10520

#I Life Science/ Life Sciences Group – I-V

Which one of the following fungus causes infected rice shoots to grow much faster relative to uninfected plants and responsible for the “foolish seedling disease” of rice?

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#Question id: 830

#SCPH01 Biochemistry

The polypeptide can assume with each point on it corresponding to a specific conformation, number of different conformations can assume with that energy, A folding protein must contain