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TLS Online TPP Program

#Question id: 23670

How might infection of a plant by E. coli transformed with a recombinant Ti plasmid be used to have a new gene (e.g. insect toxin) expressed in all cells of the plant?

#Unit 13. Methods in Biology
  1. The original plant will eventually express the new gene in all its cells even if only a few cells of the plant are initially infected by E. coli.
  2. Pollen cells must be infected and then used to produce the next generation of plants which will express the new gene in all cells.
  3. Any cell from the original plant that is infected with the E. coli is removed and treated to dedifferentiate and eventually to grow into an entire new plant in which the new gene is expressed throughout.
  4. All of the above
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TLS Online TPP Program

#Question id: 7519

#General Aptitude

Two trains start from A and B respectively and travel towards each other at the speeds of 60 km/h and 45 km/h respectively. By the time they meet, the first train has travelled 30 km more than the second. The distance between A and B is
TLS Online TPP Program

#Question id: 2142

#Unit 2. Cellular Organization

Glucose transport into erythrocytes is an example of
TLS Online TPP Program

#Question id: 1739

#Unit 4. Cell Communication and Cell Signaling

Cross-linking of B-cell surface receptors:
TLS Online TPP Program

#Question id: 1637

#Unit 4. Cell Communication and Cell Signaling

Protective antibodies against infectious agents are often:
TLS Online TPP Program

#Question id: 12158

#Unit 9. Diversity of Life Forms

Which of the following is correctly described as a primary producer?