IntroToBiologica_6.2TheCellCycle
The G0 phase occurs:
when the cell is fully mature and not preparing for cell division; the G0 phase occurs when a cell is not undergoing preparation for cell division, this stage can be temporary or permanent depending on the type of cell.
chromosomes are duplicated during what stages?
S phase, DNA replication occurs during the synthesis phase of interphase
The product of a mitotic division of one diploid cell is:
two genetically identical, diploid daughter cells
During anaphase the sister__ are pulled apart at the __ and pulled to opposite poles of the cell.
chromatids are pulled apart at the centromere
The second stage of the mitotic phase, __ separates the cytoplasmic components of the parent cell into two equal halves, creating two separate identical daughter cells.
cytokinesis, all cytoplasmic components divide into new daughter cells.
Imagine looking through a microscope at a squashed onion root tip. The chromosomes of many of the cells are plainly visible. In some cell, replicated chromosomes are lined up at the equator of the cell. The stage of mitosis these cells are in is known as__.
metaphase
What is the correct order of mitosis
prophase, prometaphase, metaphase ,anaphase, telophase
There are three stages of the interphase of the cell cycle. Which phase allows for growth, protein synthesis and a checkpoint to ensure the cell has enough material to replicate the DNA?
G1; G1 allows for the gathering of materials to replicate the DNA, produce proteins and other cytoplasmic components and growing before entering the S phase.
A cell replicates its DNA in preparation for mitosis. During the __ checkpoint, a DNA mutation is detected and the cell is prevented from proceeding into mitosis.
G2 checkpoint, DNA damage is detected at this point
There three stages of interphase of the cell cycle. Which phase allows for continued growth and protein synthesis, and has a checkpoint to examine DNA replication making sure that all of the chromosomes have been replicated properly
G2, G2 is when proteins are made that are specifically used in cell division and the DNA that was replicated in the S phase is checked for accuracy.
Some cells rarely or never divide. These cells are said to be in quiescent or __ phase called G0
inactive
At the end of the G1 phase of interphase, there is a checkpoint. What is the cell checking for at this checkpoint?
the cell is preparing to replicate its DNA in the next phase, so it needs enough material to be gathered to replicated the DNA and it is busy building proteins necessary for the replication
What happens to a cell that does not have all its chromatids attached to a kinetochore at the end of the metaphase?
the cell stops mitosis and enters a G0 phase or it will resume mitosis after all of the chromatids are attached to the kinetochose
A mutation results in a cell that no longer produces a normal protein required for the M-phase checkpoint. Which of the following would likely be the immediate result of this mutation?
the cell would never leave metaphase
