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Biochem Cell Cycle lecture
Biochem Cell Cycle lecture 4
What is the molecule called that stimulates the cell cycle?
What is the resting stage of the cell cycle where there is no growth signal but metabolism exists?
What occurs in the G
Proteins and other factors for DNA growth and division are created
What occurs in S stage?
The 46 chromosomes are duplicated
What occurs in the G
The cell double checks and produces more proteins for Mitosis
Do the daughter cells detach or remain attached to the parential chromosome?
What is the nickname for G
since there is no DNA replication occurring?
The "GAP" phase
What is the name given to the process of G
What is the reasoning behind a cell being able to divide in the M phase?
The cellular contents and DNA have doubled
What are the five stages of Mitosis?
What occurs in Prophase?
Spindles appear and chromosomes condense
What occurs in prometaphase?
Spindle fibers attach to kinetichores and chromosome condensing continues
What occurs in metaphase?
Chromosomes align at the metaphase plate
What occurs in Anaphase?
Centromeres divide and sister chromatids move to opposite poles
What occurs in Telephase?
Nuclear membrane reforms
What is the molecule that creates the spindles?
How many kinetichores are required to hold sister chromatids together?
What is the process called in Anaphase/Telephase that divides the two daughter cells?
Are gamete cells haploid or diploid?
What is the result of mitosis?
1 diploid cell giving rise to two diploid daughter cells
What is the result of meiosis?
One diploid cell giving rise to four haploid cells
occur in Meiosis and what is it?
It is when the four paternal/maternal chromosomes line up to exchange material before dividing
What are the three main differences b/t meiosis and mitosis?
1) Genetic Recombination
-Meiosis = synapsis
-Mitosis = none
2) Chromosomal Separation
-Meiosis = 23 paired sister chromatids (haploid, but 2n)
-Mitosis = 46 chromosomes (diploid 2n)
3) Haploid/Diploid resule
-Meiosis = 4 haploid daughter cells
-Mitosis = 2 diploid daughter cells