A
B
C
D
100
What are the stages of the cell cycle? You must include all of them to earn credit.
Gap 1
Synthesis
Gap 2
Mitosis
100
What do you call the region at the tips of chromosomes that function to protect the DNA from damage but do not code for genes?
telomeres
100
Give an example of an external factor that is a physical signal.
cell-to-cell contact
100
True or False: Cancer cells can divide in the absence of growth factors.
True
200
What occurs in the G2 Checkpoint?
G2 Checkpoint – checks for cell size and ensures DNA was accurately duplicated
200
True or False: Mitosis produces all cells in the body and generates two genetically identical daughter cells.
True or False:
Mitosis produces all BODY (somatic) cells and generates two genetically identical daughter cells.
200
Give an example of an internal factor.
cyclines/kinases
200
List one advantage and one disadvantage of asexual reproduction.
+ → beneficial in favorable, consistent environments; all of the offspring that result from asexual reproduction can themselves reproduce
– → with identical genetics, organisms cannot adapt to changing environments and populations can die out
300
In __, cells are unlikely to divide but they continue to carry out normal functions.
G0 (G Zero)
300
Name the Phase
Nuclear membranes begin to form.
Chromosomes start to uncoil.
Spindle fibers fall apart.
telophase
300
What is an enzyme that transfers a phosphate group from one molecule to a specific target molecule?
kinase
300
List 3 types of asexual reproduction.
mitosis, binary fission, budding, fragmentation, vegetative reproduction
400
DNA wraps around proteins like beads on a string to form a more condensed structure. These proteins are called…
histones
400
Name the Phase
Sister chromatids are pulled to opposite poles of the cell.
anaphase
400
What type of tumors metastasize and can form more tumors?
malignant tumors
400
What do we call a cell that can divide for long periods of time while remaining undifferentiated?
stem cells
500
Match the term to its definition:
1. A
2. C
3. B
500
Differentiate between cytokinesis in plant cells compared to animal cells.
In animal cells, the membrane forms a cleavage furrow that is pulled inward by tiny filaments.
In plant cells, the cell wall makes pinching inward impossible. Instead, a cell plate forms between the two nuclei.
500
Define carcinogens.
substances known to produce/promote the development of cancer
500
Which scientist proposed that all living things are made of cells?
Theodor Schwann