Biology Lab: Mitosis Flashcards
The stage of the cell cycle where each chromosome is composed of two chromatids in
preparation for mitosis?
G2
The class of enzymes that are involved in triggering events in the cell cycle are called:
Kinases
Which sequence of the cell cycle is common to eukaryotes?
G1 to S to G2 to M to cytokineses
The stage of the cell cycle where the cell is preparing to begin DNA replication is called:
G1
The proteins which complex with DNA producing the “beads on a string” or nucleosomes are called:
His tones
Which of the following features of cell division are very different for animal and plant cells?
Cytokinesis
Prior to cell division, each chromosome replicates or duplicates its genetic material. The products are connected by a centromere and are called
Sister chromatids
The first stage of mitosis when chromosomes start becoming visible in the microscope is called:
Prophase
The sputum (fluid coughed up from the lungs) of many smokers contain cells with mutations (errors) in the genes for p53. The smoking induced mutations appear to be an
early signal showing that cancer of the lungs will follow. What is the likely relationship between early p53 mutation and the development of lung cancer?
Mutations in p53 would prevent abnormal cells from dying by apoptosis.
Which of the following statements is NOT true of mitosis?
Homologous chromosomes synapse in prophase.
Cytokinesis in a plant cell is characterized by:
the formation of a cell plate in the cytoplasm
What is the purpose of the mitosis lab?
To understand the sages of mitosis and what they look like under a microscope.
What are some differences between cell division in plant and animal cells?
Animals cells have centrioles, cytokinesis and cleavage furrow. Plant cells do not have centrioles but instead microtubules and cell plate
What can you under about the time a cell spends in each stage of cell division based on the number of cells found in that stage.
The stage with the most cells has the longest time spect and vice versa
Do cells spend an equal time in each stage of cell division?
It varies but most cells spend the most time in interphase
How does cytokinesis differ between plant and animal cells?
In animal cells, cytokinesis forms cleavage furrow and pinches due to no cell wall. In plant cells, the cytokinesis forms a cell plate where vesicles gather in the middle
What specific functions occur during interphase that prepare the cell for division? Why can’t these be seen with the light microscope?
G1= cell grows
S= DNA replicates
G2= prepares for mitosis where cells grows
Canno be seen because chromosomes have not condensed yet
What is interphase?
3 stages where DNA is not condensed
What is mitosis?
4 stages and cytokinesis of nuclear division and division of cytoplasm and DNA is condensed
What are two major phases of eukaryotic cell cycle?
Interphase and mitosis
What is Interphase G1?
Cells twos in size and organelles replicate
What is interphase SYNTHESIS?
replication of DNA, synthesis of proteins, and associated with DNA
What is interphase G2?
Synthesis of proteins and associated with mitosis
What are somatic cells?
Non reproductive cells in eukaryotic organisms
