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TLS Online TPP Program

#Question id: 3749

Which of the following statements describes the process of transformation in bacteria?

#XL - Q Biochemistry

  1. A strand of DNA is created from an RNA molecule.

  2. A strand of RNA is created from a DNA molecule.

  3. Bacterial cells are infected by a phage DNA molecule.

  4. External DNA is taken into a cell, becoming part of the cell's genome.

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TLS Online TPP Program

#Question id: 399

#XL - S Microbiology

Calculate the pH of a 1 L solution containing 0.100 M formic acid and 0.100 M sodium formate before and after the addition of 1.00 mL of 5.00 M NaOH. How much would the pH change if the NaOH were added to 1.00 L of pure water? (pKa for formic acid is 3.75)
TLS Online TPP Program

#Question id: 11394

#XL - S Microbiology

Foods can be preserved in many ways by slowing or preventing bacterial growth. Which of these methods would not generally inhibit bacterial growth?
TLS Online TPP Program

#Question id: 3868

#XL - Q Biochemistry

The sigma factor of E. coli RNA polymerase: 
TLS Online TPP Program

#Question id: 750

#XL - Q Biochemistry

In strong acid and at elevated temperatures, for example perchloric acid (HClO4) at more than 100°C, nucleic acids tend to:
TLS Online TPP Program

#Question id: 34085

#XL - S Microbiology

Choose the correct statements about lysozyme and its action on the bacterial cell wall.