Foods can be preserved in many ways by slowing or preventing bacterial growth. Which of these methods should be least effective at inhibiting bacterial growth?
A) Refrigeration: slows bacterial metabolism and growth.
B) Closing previously opened containers: prevents more bacteria from entering, and excludes O2.
C) Pickling: creates a pH at which most bacterial enzymes cannot function.
D) Canning in heavy sugar syrup: creates osmotic conditions that remove water from most bacterial cells.
E) Irradiation: kills bacteria by mutating their DNA to such an extent that their DNA-repair enzymes are overwhelmed.
World human population growth through history illustrates an exponential growth pattern.
Synthesis of polar head groups of bacterial phospholipids
Data for Calculating Productivity Growth in Erewhon
Population Growth in America
Typical bacterial population growth curve showing the initial lag phase
Abnormal tissue growth and cancer development