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TLS Online TPP Program

#Question id: 10532

A  closed, self-sealing solvent-filled vesicles that are bounded by only a single bilayer, known as:

#Unit 2. Cellular Organization
  1. Micelle

  2. Liposome

  3. Lipid bilayer

  4. Liposome and lipid bilayer both
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TLS Online TPP Program

#Question id: 23670

#Unit 13. Methods in Biology

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?
TLS Online TPP Program

#Question id: 19795

#Unit 12. Applied Biology

Expression of BtR175 gene in mammalian cells enables Cry1Aa to bind the cells and cause their lysis. But upon what process this specificity can get lost?
TLS Online TPP Program

#Question id: 3329

#Unit 11. Evolution and Behavior

The following genotypes of one locus in population are given  - Genotype ( Number)

AA (120)  AB ( 30)  BB  (50) CC  (300)

AC  (400)  BC (100)

Which of the following is the correct frequency of C allele and A allele respectively?
TLS Online TPP Program

#Question id: 4005

#Unit 3. Fundamental Processes

Which does not apply to the post-transcriptional processing of ribosomal RNA?
TLS Online TPP Program

#Question id: 3982

#Unit 3. Fundamental Processes

The diagram below represents a hypothetical operon in the bacterium E. coli.  The operon consists of two structural genes (A and B) that code for the enzymes A-ase and B-ase, respectively, and also includes P (promoter) and O (operator) regions as shown.

 When a certain compound (X) is added to the growth medium of E. coli, the separate enzymes A-ase and B-ase are both synthesized at a 50-fold higher rate than in the absence of X (which has a molecular weight of about 200).  Which one of the following statements is true of such an operon?