Cell Cycle and Mitosis-BIOL-107
Cell Cycle and Mitosis
Question 1
The purpose of cell division in unicellular organisms is
reproduction
growth
tissue maintenance
tissue repair
Question 2
Function of cell division in multicellular organisms include… (please check all that apply).
reproduction
tissue maintainence
growth and developement
tissue repair
Question 3
Division in unicellular organisms is called
binary fishing
binary code
binary fusion
binary fission
binary nomenclature
Question 4
Which kinds of molecules are found in chromatin? (Please check all that apply.)
carbohydrates
DNA
lipids
proteins
Question 5
Tightly coiled chromatin becomes thick enough to see with a light microscope. These condensed chromatin structures are called
chromosomes
genes
nuclei
chromoplasts
Question 6
The two identical DNA molecules present in a chromosome are called
homologous chromatids
sister chromatids
homolgous chromosomes
introns
Question 7
In this diagram, the #2 arrow is pointing to a structure that holds the sister chromatids together. It is called
Gram positive
centriole
centromere
spindle fiber
Question 8
How can chromosomes become invisible under a light microscope when the cell is not dividing?
They don’t. Chromosomes are always visible in a cell.
The chromatin becomes less coiled and the chromosomes become too thin to see.
The protein portion of the chromatid is degraded and the chromosome becomes too small to see.
The chromatin is condensed even more so that it becomes too small to see.
Question 9
Gametes (egg and sperm) are haploid because they carry only one copy of each chromosome.
False
True
Question 10
Most cells in the human body are haploid.
False
True
Question 11
The phase of the cell cycle during which chromosomes are replicated is
metaphase
interphase G1
cytokinesis
prophase
anaphase
telophase
interphase S
interphase G2
Question 12
The phase of the cell cycle during which chromosomes line up on the division plane is
cytokinesis
prophase
anaphase
interphase S
telophase
interphase G2
interphase G1
metaphase
Question 13
The phase of the cell cycle during which spindle fibers contract, splitting the sister chromatids is
interphase G2
metaphase
cytokinesis
interphase S
prophase
anaphase
interphase G!
telophase
Question 14
The phase of the cell cycle during which the nuclear membrane breaks down is
metaphase
telophase
prophase
interphase G2
cytokinesis
interphase G!
interphase S
anaphase
Question 15
Cells which are not undergoing division are in this phase
interphase S
anaphase
prophase
telophase
metaphase
interphase G2
cytokinesis
interphase G1
Question 16
During what phase of cell division is there the most cell growth?
cytokinesis
metaphase
interphase G2
telophase
anaphase
interphase S
interphase G1
prophase
Question 17
In this diagram, what is the name of the structure of the chromosome to which the spindle fibers attach (#3)?
centriole
sister chromatids
DNA
kinetochore
centromere
Question 18
How many eggs and sperm are involved in the generation of monozygotic twins?
1 egg and 1 sperm
2 eggs and 2 sperm
1 egg and 2 sperm
2 eggs and 1 sperm
Question 19
How many eggs and sperm are involved in the generation of dizygotic twins?
1 egg and 1 sperm
2 eggs and 1 sperm
2 eggs and 2 sperm
1 egg and 2 sperm
Question 20
In animal cloning, the offspring has genetic contributions from 2 parents.
True
False
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