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TLS Online TPP Program

#Question id: 15670

A researcher would like to map the location of galE and trpA genes in a new species of bacterium that appears to be closely related to E. coli. He decides to use cotransduction, and generates appropriate donor and recipient strains. He is disappointed when cotransduction is not seen in his experiement. What is the most reasonable explanation for this situation?

#SCPH12 I Genetics
  1. His new bacterial species does not have galE or trpA genes.
  2. His new bacterial species cannot survive galE or trpA mutation.
  3. These two genes are too far apart to be mapped by cotransduction
  4. These two genes are too close together to be mapped by cotransduction
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TLS Online TPP Program

#Question id: 5523

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

Ectodermal cells condense into placodes that change into
TLS Online TPP Program

#Question id: 2637

#SCPH05 I Biotechnology

Which of these operons is anabolic?
TLS Online TPP Program

#Question id: 18081

#SCPH01 Biochemistry

The interaction of selection and inbreeding in determining the incidence of autosomal recessive diseases. Consider a gene in which recessive mutations occur at a rate of 10-5. Assume a selective disadvantage S of 0.4 in homozygotes for the recessive allele. What is the frequency of the recessive allele (q). And calculate the incidence of the disease. Assume random mating.
TLS Online TPP Program

#Question id: 23253

#SCPH28 | Zoology

FISH is an in vitro assay that uses fluorescent reporter attached to a _______ that hybridizes to chromosomes.
TLS Online TPP Program

#Question id: 1689

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

The intermolecular forces that contribute to the interaction between antibody and antigen: