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TLS Online TPP Program
#Question id: 15863
#SCPH05 I Biotechnology
what is protoplast?
TLS Online TPP Program
#Question id: 15621
#SCPH01 Biochemistry
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?
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#Question id: 311
#SCPH28 | Zoology
Which of the following has no contribution to the stability of tRNA?
TLS Online TPP Program
#Question id: 19305
#SCPH28 | Zoology
If 35S promoter is fused with Adh-I introns sequences ensures
TLS Online TPP Program
#Question id: 4966
#SCPH06 I Botany
If it were possible to conduct sophisticated microscopic and chemical analyses of microfossils found in 3.2-billion-year-old stromatolites, then within such microfossils, one should be surprised to observe evidence of:
I. double-stranded DNA
II. a nuclear envelope
III. a nucleoid
IV. a nucleolus
V. nucleic acids