TLS Online TPP Program

#Question id: 10681


Which of the following is not condition for commensalism?


#Unit 10. Ecological Principles
  1. Orchids grow on fork of tropical tree as a epiphyte
  2. Hermit crab use snail shell for their protection
  3.  Some plant associate with unpalatable plant for their protection with herbivore
  4. Many deep sea fish harbour bioluminescent bacteria in specialised organ
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TLS Online TPP Program

#Question id: 5250

#Unit 8. Inheritance Biology

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 generatesnappropriate donor and recipient strains. He is disappointed when cotransduction is not seen in his experiement. What is the most reasonable explanation for this situation?

TLS Online TPP Program

#Question id: 5251

#Unit 8. Inheritance Biology

What do transduction, transformation, and conjugation have in common?

TLS Online TPP Program

#Question id: 5253

#Unit 8. Inheritance Biology

In a hypothetical situation, the genes for sex pilus construction and for tetracycline resistance are located together on the same plasmid within a particular bacterium. If this bacterium readily performs conjugation involving a copy of this plasmid, then the resultshould be

TLS Online TPP Program

#Question id: 5255

#Unit 8. Inheritance Biology

Which of the following is a structure that permits conjugation to occur?

TLS Online TPP Program

#Question id: 5256

#Unit 8. Inheritance Biology

If the experimental population of E. coli lacks an F factor or F plasmid, and if bacteriophage are excluded from the bacterial cultures, then which of these is a means by which beneficial mutations might be transmitted horizontally to other E. coli cells?

TLS Online TPP Program

#Question id: 5257

#Unit 8. Inheritance Biology

Which term is least closely associated with the others?