The rigidity of the peptide unit and the restricted set of allowed phi and psi angles limits the number of structures accessible to the unfolded form sufficiently to allow:-

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#Question id: 3053

#SCPH06 I Botany

Bacterial culture contains 1000/ mL in the exponential growth phase. If you consider a generation time of 20 minutes, the total number of organisms / mL 60 minute will be

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#Question id: 351

#SCPH05 I Biotechnology

 If the cytoplasm of a cell is at pH 7, and the mitochondrial matrix is at pH 8, then the concentration of H+ ions ________.

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#Question id: 16129

#SCPH06 I Botany

5 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.

Describe the cis-acting elements in the GLN1 promoter that are evident from these experiments, giving both their position and as much of their function as you can deduce.

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#Question id: 15234

#SCPH01 Biochemistry

Polymerisation of acrylamide and bis-acrylamide gel takes place by free radical contribution due to

A) APS

B) Riboflavin

C) TEMED

D) SDS

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#Question id: 4133

#SCPH05 I Biotechnology

Which of the following statements about aminoacyl-tRNA synthetases is false?