Which property is shared by E. coli DNA polymerase I and DNA polymerase III?

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#Question id: 4915

#SCPH28 | Zoology

When an albino female plant of maize is crossed with normal green male plant, all plants in the progeny are albino because

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#Question id: 19307

#SCPH06 I Botany

Use of constitutive promoters to produce transgenic plants offers certain advantages.

(1) They can be used to drive reporter genes

(2) They are essential in proteins that are required in all tissues

(3) They are useful in driving transcription factors that are involved in transcription regulation

Mark the option with all correct statements?

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#Question id: 837

#SCPH28 | Zoology

Increasing order of free energy in unfolded to folded conformation of the proteins, the correct order is,

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#Question id: 10977

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

A 60-year-old man’s EKG shows that he has an R-R interval of 0.55 sec. Which of the following best explains his condition?

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#Question id: 16128

#SCPH06 I Botany

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. 

Next, you decide to evaluate the promoter for the GLN1 gene. To do this you first fuse the promoter region to the LacZ coding sequence and then place this hybrid gene on an appropriate yeast plasmid. You find that cells carrying the hybrid gene express activity under the same conditions that GS is expressed in wild type cells, meaning that the promoter region you have selected contains all of the necessary cis-acting sequences for normal regulation. The figure below shows the effect of different 50 bp deletions in the promoter region on the amount of ß-galactosidase activity expressed by the reporter gene. how would you expect a gln2– gln3– double mutant to behave?