NEW
Font size
WorksheetsUnit 4a Cell Division
Total questions: 40
Worksheet time: 20mins
The structure labeled B is called the
centriole.
spindle.
centromere.
Sister chromatid.
The structures labeled C are called
centrioles.
centromeres.
sister chromatids.
spindles.
What are the structures labeled “X” in the picture?
Spindles.
Centrioles.
Chromatids.
Centromeres.
What are the structures labeled “Y” in the above picture?
Chromatids
Spindle fibers
Centrioles
Centromeres
What is the chromosome number of cell shown above?
6
3
4
12
List the correct chronological order for the diagrams.
A, C, B, D, E
D, A, C, E, B
D, E, B, A, C
C, A, E, B, D
In which phase of the cell cycle do the events pictured occur?
G1
S
Mitosis
G2
What type of cell is represented?
Prokaryotic.
Plant.
Plant and animal.
Animal.
What type of cell is represented in this picture?
a plant
a bacterium
an animal
a virus
Cancer results when cells cannot control
spindle fibers.
size.
cell division.
surface area.
Accelerated cell division caused by harmful mutations results in
cancer
slow cell growth
cell enters G0 phase
mitosis is stopped
A student observing cells under the microscope sees the chromosomes lined up along the equatorial plane in some cells. These cells are most likely in
anaphase
prophase
interphase
metaphase
At what point in the cell cycle does DNA synthesis occur and why?
after a cell divides, to provide each of the two resulting cells with a complete set of DNA instructions
in S phase before a cell divides, to provide each of the two resulting cells with a complete set of DNA instructions
during cytokinesis before a cell divides, to make more ATP
during cell division, to ensure that the DNA is used by the lysosomes
The structure labeled A is called
centrioles.
centromeres.
sister chromatids.
chromosome.
During which stage of the cell cycle is the formation of spindle fibers and chromatin condensing into chromosomes seen?
Prophase
Metaphase
Anaphase
Telophase
During which stage of the cell cycle is the formation of spindle fibers and chromatin condensing into chromosomes seen?
During which stage of the cell cycle is the formation of the nuclear envelope around the chromosomes?
Prophase
Metaphase
Anaphase
Telophase
What happens at the end of the M phase and before the G1 phase of the cell cycle?
DNA replicates.
The cell grows to adult size.
Cytokinesis occurs.
The nucleus divides.
If a pharmacology company wanted to develop a cancer fighting drug, which process would most likely be affected by the new drug and why?
Cellular respiration because all cells need ATP.
Cell differentiation because undifferentiated cells can't cause cancer.
Transport of molecules because interrupting transport stops cancer.
Cellular division because cancer is caused by uncontrolled cell division.
During which phase does DNA replication occur?
G1
S
G2
M
What part of the cell cycle results in daughter cells?
Prophase
G2 checkpoint
S phase
Cytokinesis
What happens prior to the cell entering the G2 stage of of the cell cycle?
DNA replication occurs.
The cell makes RNA.
Chromosomes align.
The nucleus divides.
What occurs at G1 in the cell cycle?
Period of growth and development between mitotic divisions
Nuclear membrane, nucleolus, and chromatin fade
Cleavage of cytoplasm and formation of cell plate
Chromatin condenses to form chromosomes
Cells have genes that affect cell division. Tumor suppressor genes like p53 prevent continuous cell division and and are normally turned on in adult organisms but can be turned off by the effects of smoking tobacco. What is the most likely result of turning off p53?
White blood cells are unable to stop infections
Cells undergo uncontrolled division
DNA chains are broken and form more chromosomes
Lungs become black from smokin
What is occurring within the cell?
Chromatin is condensing to form visible chromosomes.
DNA is replicated so there are two copies of each chromosome in each daughter cell.
The spindle is attaching to chromatids to move them to the middle.
A cleavage furrow is forming to divide the cell into two daughter cells.
Which statement does not describe cell cycle checkpoints?
Cell checkpoints can fail in mitosis and meiosis.
Faulty checkpoints may lead to abnormal cell growth.
Defective checkpoints result in the death of the cell.
Normal checkpoints assess damage to DNA.
During the cell cycle, normal cells exit the G1 phase and enter the G0 phase where they rest, then reenter the cycle at G1 prior to going on to S phase. Abnormal cells, such as cancer cells, may not be allowed to enter the G0 phase to rest. As a result, these cells will most likely
die after DNA replication.
fail to complete mitosis.
mutate during G2.
continuously repeat the cycle.
What is the purpose of mitosis?
It guarantees that each daughter cell has half the amount of DNA of parent cells.
It ensures the reproduction of mitochondria and chloroplasts.
It ensures that new nuclei have an exact copy of DNA.
It prevents the occurrence of cancer cells.
