29 Questions
What is the primary reason why cell division is necessary for living organisms?
to reproduce and ensure continuity of life
What is the main distinction between living and nonliving matter?
ability to produce more of their own kind
What is the role of cell division in unicellular organisms?
it reproduces the entire organism
What is the role of cell division in multicellular eukaryotes?
it is necessary for development, growth, and repair
What is the process by which cells reproduce?
mitosis
What is the term for the life of a cell from formation to its own division?
cell cycle
What appears to drive the cell cycle?
Specific chemical signals present in the cytoplasm
What happens when a G1 nucleus is fused with an S phase nucleus?
The G1 nucleus immediately enters S phase
What is the cell cycle control system similar to?
A clock
What regulates the cell cycle control system?
Both internal and external controls
What is the purpose of checkpoints in the cell cycle control system?
To ensure the cell cycle stops until a go-ahead signal is received
Where are the molecules that control the progression to S and M phases found?
In the cytoplasm
What is the result of most cell division?
Genetically identical daughter cells
What constitutes the cell's genome?
All the DNA in a cell
What is the characteristic of eukaryotic chromosomes?
They are composed of chromatin and protein
What is the number of chromosomes in gametes compared to somatic cells?
Half as many
What happens to DNA during preparation for cell division?
It is replicated and the chromosomes condense
What is the function of cohesins in sister chromatids?
They attach the sister chromatids along their lengths
What happens if a cell does not receive a go-ahead signal at the G1 checkpoint?
It will exit the cell cycle and enter the G0 phase
What is the purpose of the G1 checkpoint?
To control cell growth and division
What happens if all chromosomes are properly attached to the spindle at the metaphase plate?
The cell will receive a go-ahead signal
What is the result of a cell receiving a go-ahead signal at the G1 checkpoint?
The cell will continue to the S, G2, and M phases
What is the purpose of the M checkpoint?
To ensure all chromosomes are properly attached to the spindle
What is the result of a cell not receiving a go-ahead signal at the G1 checkpoint?
The cell will enter the G0 phase
What has led to advances in cancer treatment?
Advances in understanding the cell cycle and cell cycle signaling
What is the result of sequencing the DNA of cells in a particular tumor?
More personalized treatments
What is the purpose of the cell cycle?
To regulate cell growth and division
What phase of the cell cycle is characterized by the separation of sister chromatids?
Mitosis
What is the result of the cell cycle?
A single cell becomes two identical daughter cells
Learn about the key roles of cell division, the continuity of life, and the reproduction of cells in this chapter 12 quiz on mitosis. Understand the process of cell division and its importance in living organisms. Test your knowledge of chromosomes, cell machineries, and more.
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