Electrophoretic resolution can be mainly changed by adjusting the

a) current 

b) pH of buffer system

c) luminous intensity 

d) Gel concentration

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#Question id: 1581

#SCPH28 | Zoology

An otherwise healthy student in your class is infected with EBV, the virus that causes infectious mononucleosis. The same student had already been infected when she was a child, and she had merely experienced a mild sore throat and swollen lymph nodes in her neck. This time, though infected, she does not get sick. 

Her immune systemʹs recognition of this infection will involve which of the following?

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#Question id: 14833

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

The pneumococcal vaccine is directed against the

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#Question id: 3658

#SCPH01 Biochemistry

In E. coli, the UvrABC endonuclease removes _____________and other bulky lesions by recognizing the distortion these produce in the double helix.

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#Question id: 1102

#SCPH06 I Botany

Caffeine is an inhibitor of phosphodiesterase. Therefore, the cells of a person who has recently consumed coffee would have increased levels of which of the following molecules?

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#Question id: 15621

#SCPH06 I Botany

Wild type E. coli metabolizes the sugar lactose by expressing the enzyme ß-galactosidase. You have isolated a mutant that you call lac1–, which cannot synthesize ß-galactosidase and cannot grow on lactose (Lac–). During an condition Lac– strain, called lac3–, is linked to the Tn5 insertion. From a strain carrying the Tn5 insertion and lac3– mutation you isolate an F’ that caries a region of the chromosome that includes both Tn5 and the linked Lac region. Introduce this F’ into an F– strain carrying lac1– by selecting for Kanr. These merodiploids express ß-galactosidase normally. If the merodiploid were Lac–, 

a) the two mutations lie in the different gene.

b) Both mutation are complement each other

c) the two mutations lie in the same gene.

d) Both of the mutations is dominant to wild type.

what could you conclude about the relationship between the lac3– and lac1– mutations from  these statements?