1-2: T1 - Bacterial and Eukaryotic Cell Growth Flashcards
Bacterial Cell Growth
Growth in cells = cell division = binary fission
Growth in population = growth phases
One round of cell division = one
generation = one doubling of the bacterial population
Phases of Population Growth
Eukaryotic Cell Growth
Cell division in eukaryotes is more complicated than prokaryotes
First the nucleus is divided by mitosis
Then the cytoplasm is divided by cytokinesis
Growth and Division of Individual Cells (Binary Fission)
In prokaryotic organisms, individual cells replicate their genetic material and divide into two identical daughter cells through binary fission. This process increases both the number of cells in the population and the size of individual cells
Growth of a Population of Cells and
Factors Influencing Population Growth
Refers to the overall increase in the # of prokaryotic cells within a colony
Population growth results from the replication and division of multiple individual cells
Is influenced by factors such as nutrient availability, environmental conditions, and competition with other microorganisms
Lag Phase
Slow or no growth phase as cells adapt to the environment, synthesize necessary enzymes, and prepare for exponential growth.
Growth Curve:
Flatline indicating little change in population size.
Exponential (Log) Phase
Rapid and continuous cell division with the highest growth rate, driven by favourable conditions and ample nutrients.
Growth Curve:
Steep upward slope representing rapid population increase.
Stationary Phase
Growth rate slows, and population stabilizes as resources become limited or environmental conditions become less favourable.
Growth Curve:
Horizontal line indicating a constant population size
Death Phase
Decline in cell numbers due to adverse conditions, nutrient depletion, and the buildup of toxic waste products.
Growth Curve:
Steep downward slope reflecting a rapid decrease in population size.
