DT12

"The time required for a cell to undergo binary fission is called the......"

• exponential growth rate

• generation time

• growth curve

• lag period

The stage in population growth with the highest rate of cell division

is the.....

• stationary phase
  

• exponential phase

• lag phase

• enlargement phase
  

An organism that can synthesize all its required organic components

from CO2 using energy from the sun is a

• photoautotroph

• chemoautotroph

• photoheterotroph

• chemoheterotroph

Bacteria isolated from Lake Natron, where the water pH is close to 10, are which of the following?

• facultative anaerobes

• alkaliphiles

• neutrophiles

• obligate anaerobes

Only gram........ bacteria can growth in MacConkey agar

so MacConkey agar is ......... media

• • -positive

    -transport

• • -positive

    -selective

• • -negative

    -selective

• • -negative

    -differential

Which method can measures only viable count ?

• Count by Hemocytometer

• Measure from Nitrogen

• Count from Pour plate

• Using Spectrophotometers