Cell division is used for which of the following ? - Reproduction of single-celled organisms, growth of multicellular organisms, repair and replacement of
... [Show More] cells, and sperm and egg production
Asexual and sexual reproduction differs in that sexual reproduction_____________ - Can produce great variation among the offspring (Meiosis)
Asexual Reproduction ____________ - Produces offspring genetically identical to the parent (Mitosis)
Most of the time, DNA is in the form of____________ - Euchromatin
When the DNA condenses, it becomes ____________ - Heterochromatin
Histones are - Proteins around which DNA is coiled
In eukaryotes, chromosomes are tightly coiled due to the association of histone proteins and DNA. Three structures are known as - Nucelosomes
What is the protein complex that holds sister chromatids together? - Cohesins
Condensin - Condenses DNA
What is the "Waist" of the chromosome, where the sister chromatids are joined together called? - Centromere
Immune system cells enter a resting phase after undergoing mitosis. When activated- for example, by an infection-- they can reenter the sequence of events in the cell cycle that leads to cell division. What would be the correct sequence of events? - G1, S, G2, M
When examining cells in the laboratory, you notice that a particular cell has half as much DNA as the surrounding cells. It appears that this cell's cell cycle halted at checkpoint______. - G1
which of the following statements correctly describes the timing of DNA synthesis? - DNA is synthesized in the S phase of interphase
which of the following shows the cell cycle in the correct chronological order? - interphase, prophase, prometaphase, metaphase, anaphase, telophase (IPPMAT)
A human somatic (Body) cell contains _____ chromosomes. - 46 (diploid)
What would be the immediate consequence of destroying a cell's centrosomes? - the mitotic spindle would not form
What does the mitotic spindle do in Mitosis? - Pull chromosomes apart
Where do the spindle fibers attach to the chromosomes during Mitosis and Meiosis? - Kinetochore
What happens in Interphase? - Copy of DNA, Cell grows, 2 centrosome form
What happens in Prophase of Mitosis? - Nuclear Envelope disappears, Chromosomes or chromatin condense, spindle forms and attach to kinetochores.
What happens in metaphase of Mitosis? - Align in the center
What happens in Anaphase of Mitosis? - Sister chromatid separate
What happens in Telophase of Mitosis? - Nuclear Envelope reforms, Chromosome Uncondensed,
During cytokinesis, in animals a_____ forms and in plants________ forms? - Cleavage Furrow, Cell plate
What are the 4 things that control cell division? - Density- dependent inhibition, growth factors, anchorage dependence, (G1, G2, M check points)
How does the cell cycle control system regulate cell division? - triggers & coordinates key events (director of a movie)
True or False: If a cell doesn't have enough cyclins when it reaches a checkpoint, it won't move on to the next phase of cell division. - True
What enzyme reacts with cyclin to trigger events in the cell division cycle by phosphorylating specific target proteins? - CDK (Cycline dependent Kinase)
If the DNA has been damaged, then it causes an increase in a transcription regulator called _____ which stimulates the transcription of a CDK inhibitor_______ that prevents the cell from entering the S Phase of interphase. - P53, P21
Apoptosis is.... - Programmed Cell Death [Show Less]