11.1: The Cell Cycle Flashcards
Key terms from chapter 11.1 reading.
Prokarykotic cells divide by…
Binary Fission
6 Steps of Binary Fission
- DNA molecule (circular) is attached by proteins to the inner membrane.
- DNA replication begins at the origin and proceeds bidirectionally around circle.
- New DNA is attached to inner membrane near the origin
- As cell elongates, the DNA attachment sites separate.
- A constriction forms at the midpoint
- The synthesis of new cell membrane and cell wall separates the two daughter cells.
Eukaryotic cells divide by…
Mitotic cell division.
Division of the nucleus is called…
Mitosis
Binary Fission basic summary
Replication of DNA, segregation of rep DNA to daughter cells, divsion
Division of the cell wall…
Cytokinesis
Chromosomes contain:
A single DNA molecule and proteins
Phases of the cell cycle (2)
M phase and interphase
M phase
- mitosis
- cytokinesis
What is interphase?
Time between two successive M phases.
Interphase phases
S phase, G1, G2
What happens during interphase?
Preparations for division: DNA replication, cell growth
What happens during S phase?
DNA replication
What happens during G1 phase?
Preparation for S-phase DNA synthesis; regulatory proteins made
What happens during G2 phase?
Size and protein content of cell increase: prep for M-phase mitosis and cytokinesis.