TLS Online TPP Program

#Question id: 149


The pKaʹs of the side chain group and the α-carboxyl group of glutamate are 4.1 and 2.1, respectively. Which statement accounts for this difference?

#Section 2: General Biology
  1. The side chain has more possible resonance structures.

  2. The α-carboxyl group has less steric hindrance and is therefore ionized more easily.

  3. The side chain is a different functional group than the α-carboxyl group.

  4. The α-carboxyl group is closer to the α-amino group than the side chain is.

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TLS Online TPP Program

#Question id: 5248

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following is a description of generalized transduction?

TLS Online TPP Program

#Question id: 5249

#Section 3: Genetics, Cellular and Molecular Biology

What is the best explanation for why Bernard Davis didn't observe generalized transduction in his U tube experiments?

TLS Online TPP Program

#Question id: 5250

#Section 3: Genetics, Cellular and Molecular 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: 5252

#Section 3: Genetics, Cellular and Molecular Biology

Which type(s) of genetic transfer lead to incorporation of new DNA into the bacterial chromosome?

I. Conjugation mediated by F factor

II. Hfr mediated conjugation

III. Transduction

IV. Transformation

TLS Online TPP Program

#Question id: 5253

#Section 3: Genetics, Cellular and Molecular 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

#Section 3: Genetics, Cellular and Molecular Biology

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