Exam 5: Microbial Growth

The process by which macromolecules are synthesized from monomers is called___________ .

Use the formulas N = N02n and g = t/n. N = final cell number, N₀ = initial cell number, n = number of generations, t = time, g = generation time. Find the generation time if N = 2 × 10⁸, N₀ = 3 × 10⁶ and t = 3 hours.

The optimal growth pH represents the pH of the intracellular environment.

The time interval required for the formation of two cells from one is called the

Explain why clinical medicine has an interest in understanding bacterial cell division at the molecular level.

An agar plate for counting colonies and maximizing statistical validity should ideally contain

In a chemostat, growth rate and growth yield can be controlled independently.

Explain why it is notable that FtsZ- type proteins have been found in mitochondria and chloroplasts.

Enzymes called___________ create small openings in the prokaryotic cell wall that are formed at the FtsZ ring.

The cardinal temperatures are the

Oxygen in its normal ground state is referred to as

Some microbes can grow in boiling water.

Organisms generally respond equally to a given environmental factor.

For most purposes, viable counting usually gives accurate information about the number of active cells present in a culture volume.

Probably the most important environmental factor affecting microbial growth is ____________.

Organisms with a specific requirement for salt are known as___________ .

The lag phase does NOT occur if all the cells in the culture are viable.

___________is the term used to describe the maintaining of cultures in a constant environment. The system is then said to be in a(n)___________ .

An organism capable of growth at full oxygen tensions of 21% is

Knowledge of microbial growth patterns is useful in working with the control of microbial growth.