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TLS Online TPP Program

#Question id: 23593

In a blue/white screen

#Unit 13. Methods in Biology
  1. the blue colonies represent cells transformed with cloning vectors which contain inserts.
  2. the white colonies represent cells transformed with recombinants.
  3. the presence of blue dye identifies cells containing a disrupted a-galactosidase gene.
  4. All of the above
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TLS Online TPP Program

#Question id: 15249

#Unit 2. Cellular Organization

Halophiles have adapted so completely to ____________ conditions that they require high levels of ___________ to grow.
TLS Online TPP Program

#Question id: 15250

#Unit 2. Cellular Organization

Osmotolerant microorganisms can survive at extreme osmotic pressure because
TLS Online TPP Program

#Question id: 15251

#Unit 2. Cellular Organization

The alga Dunaliella viridis tolerates high concentrations of
TLS Online TPP Program

#Question id: 15252

#Unit 2. Cellular Organization

A process in which a suspension of microbes is quickly frozen at temperatures ranging from - 54°C to -72°C, and the water is removed by a high vacuum (sublimation) 
TLS Online TPP Program

#Question id: 15253

#Unit 2. Cellular Organization

The water activity in foods that have high levels of salt or sugar is
TLS Online TPP Program

#Question id: 15254

#Unit 2. Cellular Organization

For growth, most bacteria require water activity levels above