What are the specialized cell type involved in the entry of lymphocytes into lymph nodes called?

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#Question id: 5199

#SCPH28 | Zoology

For mapping studies of genomes, most of which were far along before 2000, the 3 -stage method was often used. Which is the usual order in which the stages were performed, assuming some overlap of the three?

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#Question id: 1636

#SCPH01 Biochemistry

Edward Jenner vaccinated against smallpox using:

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#Question id: 15617

#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 you have a wild type (Lac+) strain carrying a Tn5 insertion known to be near several Lac genes on the E. coli chromosome. You grow P1 phage on this strain and use the resulting phage lysate to infect the lac1– strain, selecting for kanamycin resistance (Kanr). Among 100 Kanr transductants, you find that 82 are Lac– and 18 are Lac+. Express the distance between Tn5 and the lac1– mutation as a cotransduction frequency;

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#Question id: 27165

#SCPH01 Biochemistry

Sequences those have sequence identity above 60% falls in the zone of

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#Question id: 2952

#SCPH01 Biochemistry

Throughout interphase,.. .........  are synthesized at a relatively constant rate, whereas  ............ are synthesized only during the S phase.