Bacterial Replication Flashcards
What is the cell cycle?
A sequence of events from the formation of the new cell through the next cell division.
How do bacteria replicate?
Binary fission.
What are the three phases of the bacterial cell cycle?
- Period of growth after the cell is born.
- Chromosome replication and partitioning.
- Cytokinesis (septation).
What occurs during the first step of binary fission?
a. The cell prepares for division by enlarging its cell wall.
b. Plasma membrane enlarges.
c. Overall volume increases.
d. DNA replication begins.
What occurs during step 2 of binary fission?
a. Septum development begins.
b. Chromosomes move to opposite ends of the connected, developing cells.
c. Other cytoplasmic components are evenly distributed throughout the two developing cells.
What occurs during step 3 of binary fission?
The septum is synthesized completely through the cell center, creating two separate cell chambers.
What occurs during step 4 of binary fission?
The daughter cells are separate or, in some species, remain attached in a chain.
*Some bacterial cells will begin binary fission before they are finished dividing, allowing for more rapid multiplication.
How many origins of replication are there on each chromosome in a prokaryotic cell?
1.
What enzyme is used to synthesize DNA in prokaryotic cells?
DNA Pol. III.
What enzyme is required for the removal of RNA primers and replacement of RNA with DNA?
DNA polymerase I.
What is septation?
The formation of a cross wall between two daughter cells.
What is step 1 of septation?
Selection of site for septum formation.
What is step 2 of septation?
Assembly of Z ring from FtsZ proteins after the replication of genetic material.
What is step 3 of septation?
Assembly of cell wall-synthesizing machinery.
What is step 4 of septation?
Constriction of cell and septum formation.
