In a laboratory experiment, a strain of E. coli was transferred from a growth medium containing only fructose as the carbon and energy source into a new growth medium containing a large complex polysaccharide (heparin) as the only carbon and energy source. This strain of E. coli had the genetic capability to grow on both of these substrates. Upon transfer to this new complex medium, the bacteria initially enter which phase of growth?
A. Lag
B. Log
C. Stationary
D. Death and Decline
Answer:A
In a laboratory experiment, a strain of E. coli was transferred from a growth medium containing only fructose as the carbon and energy source into a new growth medium containing a large complex polysaccharide (heparin) as the only carbon and energy source. This strain of E. coli had the genetic capability to grow on both of these substrates. Upon transfer to this new complex medium, the bacteria initially enter which phase of growth?
A. Lag B. Log C. Stationary D. Death and Decline