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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: 26347

#Unit 2. Cellular Organization

Which of the following  stimulates the  formation of the 30 nm fiber
TLS Online TPP Program

#Question id: 29416

#Unit 6. System Physiology – Plant

Which of the following is not a phase of phases of the Calvin cycle
TLS Online TPP Program

#Question id: 10182

#Unit 1. Molecules and their Interaction Relevant to Biology

Glycerophospholipids (or phosphoglycerides) are the major lipid components of biological membranes. They consist of glycerol-3-phosphate whose :
TLS Online TPP Program

#Question id: 5845

#Unit 8. Inheritance Biology

Which of the following statements is false?  In vitro, the strand-exchange reaction:
TLS Online TPP Program

#Question id: 14962

#Unit 8. Inheritance Biology

In single factor crosses between two true breeding strains of tree frog, a scientist discovers that plain green tree frogs and tree frogs with a red 'racing stripe' always produce offspring that have red racing stripes. Why?