Tag: dbt jrf 2019

102. For metabolic engineering in plants having improved tolerance to osmotic stress, mannitol is overproduced because it: (1) lowers the water potential in the plant cell (2) increases the water […]

100. Which one of the following statements is INCORRECT in relation to reverse phase chromatography? (1) The solutes elute with decreasing order of polarity. (2) The stationary phase surface covering […]

99. Proteins can act as excellent buffers because of: (1) The wide range of pKa values of side chains found within the proteins. (2) The ability of the terminal regions […]

If the intracellular pH of a cell becomes basic, which one of the following will help reduce the pH? (1) Export of Cland import of HCO3 – (2) Import of […]

97.An experiment involves formation of RNA-DNA hybrid. Which one of the following enzymes could be utilized to degrade only the RNA strand from the RNA-DNA hybrid? (1) Micrococcal nuclease (2) […]

96.If the allele A is incompletely dominant over allele a, what is expected in a progeny of two heterozygous parents? (1) Same phenotypic and genotypic ratios (2) 2:1 phenotypic ratio […]

95. Colour blindness (B) in human follows sex-linked recessive mode of inheritance. If a couple with normal colour vision have a colour-blind son. What will be the genotypes of the […]

94. You have two tubes containing bacteriophage labelled with radioactive phosphorous (tube A) and radioactive Sulphur (tube B) that are devoid of bacteria. You use these bacteriophage to infect separate […]

93. A scientist performs a series of experiments to determine the recombination frequencies between the following genes. He acquires the following data: P – Q: 3%; Q – R: 2%; […]