BIO 181 EXAM CH. 12, 13, 14 QUESTIONS
WITH CORRECT ANSWERS 2025
what is binary fusion? - CORRECT ANSWER -
The chromosome replicates (beginning at the origin of replication) and two daughter chromosomes acti
vely move apart
In what kind of organisms does binary fission occur? - CORRECT ANSWER -
Prokaryotic cells and unicellular protozoa (only some, not all)
What are the roles of mitosis? - CORRECT ANSWER -Growth, reprodution, and Damage repair
In which cells mitosis occurs? - CORRECT ANSWER -
root and shoot apices of plants, In eukaryotes, Somatic cells (vegetative cells)
What are the phases in mitosis? - CORRECT ANSWER -
prophase, prometaphase, metaphase, anaphase, telophase
What happens during prophase of mitosis? - CORRECT ANSWER -
nuclear envelope degenerates, nucleus disappears, chromosomes become condensed
What happens during prometaphase of mitosis? - CORRECT ANSWER -
DNARcondenses, nuclear envelope degenerates, spindle fibers tighter, polar fibers extend from the poles
to true equatorial plate
What happens during metaphase of mitosis? - CORRECT ANSWER -
chromosomes have moved to the center of the cell, chromosomes align in single file on the metaphase
plate
What happens during anaphase of mitosis? - CORRECT ANSWER -
DNARis duplicated allowing chromosomes to separate, chromatids separate, migrate to separate poles (o
wn daughter chromosomes), fibers shorten
, What happens during telophase of mitosis? - CORRECT ANSWER -
completes mitosis, a membrane forms around each set of chromosomes, nuclei reappears, spindle fiber
s disappear, chromosomes uncoil (invisible again), two daughter cells interphase
What is cytokinesis? - CORRECT ANSWERR-follows mitosis, cell divides into two daughter cells
How does cytokinesis occur in a plant cell? - CORRECT ANSWER -plate formation
How does cytokinesis occur in an animal cell? - CORRECT ANSWER -cleavage
What are sister chromatids? - CORRECT ANSWER -joined copies of the original chromo-
some
What happens during interphase? - CORRECT ANSWER -
a cell grows by producing proteins and cytoplasmic organelles, duplication of chromosomes
When does interphase occur? - CORRECT ANSWER -before mitosis
Are the daughter cells produced by mitosis identical or different? - CORRECT ANSWER -identical
What happens when the cell cycle control system does not work? - CORRECT ANSWER -
If the cell does not receive the go-
ahead signal in G1 checkpoint, it will exit the cycle, switching into a nondividing state called the G0 phas
e
What happens during meiosis I? - CORRECT ANSWER -the chromosomes split into sister chromatids
What events occur during prophase I of meiosis I? - CORRECT ANSWER -crossing over occurs
What is the outcome of tetrad formation and crossing over during prophase I of meiosis I? -
CORRECT ANSWER -
tetrad is the foursome of chromatids that forms when replicated homologous chromosomes align. It mu
WITH CORRECT ANSWERS 2025
what is binary fusion? - CORRECT ANSWER -
The chromosome replicates (beginning at the origin of replication) and two daughter chromosomes acti
vely move apart
In what kind of organisms does binary fission occur? - CORRECT ANSWER -
Prokaryotic cells and unicellular protozoa (only some, not all)
What are the roles of mitosis? - CORRECT ANSWER -Growth, reprodution, and Damage repair
In which cells mitosis occurs? - CORRECT ANSWER -
root and shoot apices of plants, In eukaryotes, Somatic cells (vegetative cells)
What are the phases in mitosis? - CORRECT ANSWER -
prophase, prometaphase, metaphase, anaphase, telophase
What happens during prophase of mitosis? - CORRECT ANSWER -
nuclear envelope degenerates, nucleus disappears, chromosomes become condensed
What happens during prometaphase of mitosis? - CORRECT ANSWER -
DNARcondenses, nuclear envelope degenerates, spindle fibers tighter, polar fibers extend from the poles
to true equatorial plate
What happens during metaphase of mitosis? - CORRECT ANSWER -
chromosomes have moved to the center of the cell, chromosomes align in single file on the metaphase
plate
What happens during anaphase of mitosis? - CORRECT ANSWER -
DNARis duplicated allowing chromosomes to separate, chromatids separate, migrate to separate poles (o
wn daughter chromosomes), fibers shorten
, What happens during telophase of mitosis? - CORRECT ANSWER -
completes mitosis, a membrane forms around each set of chromosomes, nuclei reappears, spindle fiber
s disappear, chromosomes uncoil (invisible again), two daughter cells interphase
What is cytokinesis? - CORRECT ANSWERR-follows mitosis, cell divides into two daughter cells
How does cytokinesis occur in a plant cell? - CORRECT ANSWER -plate formation
How does cytokinesis occur in an animal cell? - CORRECT ANSWER -cleavage
What are sister chromatids? - CORRECT ANSWER -joined copies of the original chromo-
some
What happens during interphase? - CORRECT ANSWER -
a cell grows by producing proteins and cytoplasmic organelles, duplication of chromosomes
When does interphase occur? - CORRECT ANSWER -before mitosis
Are the daughter cells produced by mitosis identical or different? - CORRECT ANSWER -identical
What happens when the cell cycle control system does not work? - CORRECT ANSWER -
If the cell does not receive the go-
ahead signal in G1 checkpoint, it will exit the cycle, switching into a nondividing state called the G0 phas
e
What happens during meiosis I? - CORRECT ANSWER -the chromosomes split into sister chromatids
What events occur during prophase I of meiosis I? - CORRECT ANSWER -crossing over occurs
What is the outcome of tetrad formation and crossing over during prophase I of meiosis I? -
CORRECT ANSWER -
tetrad is the foursome of chromatids that forms when replicated homologous chromosomes align. It mu
