Prophase
Prophase occurs in
1) Mitosis
2) Meiosis
3) Both
4) Neither
1) Mitosis
True or False: The nuclear envelope breaks down in prometaphase.
True
True or False: The centromeres of each chromosome align along the mitotic plate of the cell.
False: They are aligned along the metaphase plate.
Mitosis has 5 subphases. What number is anaphase?
Fourth phase
What process does telophase end?
mitosis
When chromatin fibers become tightly coiled they can be seen through a(n) _____.
1) transmission electron microscope
2) light microscope
3) scanning electron microscope
2) light microscope
In prometaphase, the mitotic spindle:
1) releases chromosomes
2) destroys chromosomes
3) copies chromosomes
4) captures chromosomes
4) captures chromosomes
Kinetochores of each sister chromatid attach to this structure to pull the chromosome to opposite poles.
1. microfilaments
2. nucleus
3. microtubules
4. centromeres
3. microtubules
Which microtubule organizing organelles split during this phase?
Centromeres
What appears in telophase?
1) 2 chromosomes
2) 2 daughter nuclei
3) mitotic spindle
4) 2 daughter cells
2 daughter nuclei
True or False: In the first step of Prophase, the chromatin fibers become more tightly coiled and folded
True
True or False: A kinetochore is a patch of protein found on the nucleus of each sister chromatid.
False: A kinetochore is a patch of protein found on the centromere of each sister chromatid.
Chromosomes at this stage consist of what structures?
2 identical sister chromatid and a centromere.
True or False. At the end of anaphase, one side of the cell has an equal amount of chromosomes.
False; At the end of anaphase, both sides of the cell have an equal amount of chromosomes.
What forms around the chromosomes?
The mitotic spindle starts to form in the.
1) Nucleus
2) Cytoplasm
3) Mitochondria
4) Plasma Membrane
2) Cytoplasm
What are centromeres:
1) regions of DNA where the sister chromatids are most tightly connected.
2) regions of RNA that bind kinetochores together
3) patches of DNA that stabilize the mitotic spindle
4) patches of ribosomes that form a structure called the aster
1) regions of DNA where the sister chromatids are most tightly connected
What event ensures that the daughter cells will receive one exact copy of chromosomes?
1. Chromosomes condense
2. Alignment of chromosomes at metaphase plate
3. The nuclear envelope breaks down
2. Alignment of chromosomes at the metaphase plate.
True or False. Anaphase is the longest phase of mitosis.
False; Anaphase is the shortest phase of mitosis.
True or False: Telophase is the end of the cell division process.
False: Cytokinesis is the end of the cell division process.
True or False: The duplicated chromosomes start to form and each appear as 4 identical sister chromatids.
False: The The duplicated chromosomes start to form and each appear as 2 identical sister chromatids.
True or False: Microtubules that bind a chromosome are called kinetochore microfilaments
True or False: Microtubules that bind a chromosome are called kinetochore microtubules
The purpose of spindle fibers during metaphase is to...
Ensure precise alignment of chromosomes for separation in the next phase.
What aids the separation of chromosomes as spindle fibers shorten in this phase?
ATP
True or False: In prophase, the chromosomes uncoil and the mitotic spindle form, while in telophase, the chromosomes coil and the mitotic spindle disappears.
False: In prophase, the chromosomes coil and the mitotic spindle form, while in telophase, the chromosomes uncoil and the mitotic spindle disappears.