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TLS Online TPP Program

#Question id: 9162

If the direction of Earth's rotation reversed, the most predictable effect would be ________.

#SCPH06 I Botany
  1. an elimination of deserts and increase in tropics
  2. winds blowing from west to east along the equator
  3. a loss of seasonal variation at high latitudes
  4. the elimination of ocean currents
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TLS Online TPP Program

#Question id: 1035

#SCPH06 I Botany

A new drug is developed that inhibits formation of the flagellar filament by impairing production of the protein flagellin. Is this going to be a good drug?
TLS Online TPP Program

#Question id: 15617

#SCPH28 | Zoology

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;
TLS Online TPP Program

#Question id: 2637

#SCPH01 Biochemistry

Which of these operons is anabolic?
TLS Online TPP Program

#Question id: 1607

#SCPH01 Biochemistry

Which of the following does NOT protect body surfaces?
TLS Online TPP Program

#Question id: 19752

#SCPH05 I Biotechnology

Which of the following is ionic ?