BSC 118: Chapter 12 My Labs Plus
As in most areas of biology, the study of mitosis and the cell cycle involves a lot of new
terminology. Knowing what the different terms mean is essential to understanding and
describing the processes occurring in the cell. - Answer- 1. DNA replication produces
two identical DNA molecules, called SISTER
CHROMATID(S), which separate during mitosis.
2. After chromosomes condense, the CENTROMERE(S) is the region where the
identical DNA molecules are most tightly attached to each other.
3. During mitosis, microtubules attach to chromosomes at the KINETOCHORE(S)
4. In dividing cells, most of the cell's growth occurs during INTERPHASE
5. The MITOTIC SPINDLE(S) is a cell structure consisting of microtubules, which forms
during early mitosis and plays a role in cell division.
6. During interphase, most of the nucleus is filled with a complex of DNA and protein in
a dispersed form called CHROMATIN
7. In most eukaryotes, division of the nucleus is followed by CYTOKINESIS, when the
rest of the cell divides.
8. The CENTROSOME(S) are the organizing centers for microtubules involved in
separating chromosomes during mitosis.
The cell cycle represents the coordinated sequence of events in the life of a cell from its
formation to its division into two daughter cells. Most of the key events of the cell cycle
are restricted to a specific time within the cycle.
In this exercise, you will identify when various events occur during the cell cycle. Recall
that interphase consists of the G1, S, and G2 subphases, and that the M phase consists
of mitosis and cytokinesis. - Answer- a. non-dividing cells exit cell cycle
b. at this point, cell commits to go through the cycle
c. DNA replicate
d. centrosome replicates
e. mitotic spindle begins to form
f. cell divides, forming two daughter cells
As the chromosomes of a parent cell are duplicated and distributed to the two daughter
cells during cell division, the structure of the chromosomes changes.
Answer the three questions for each phase of the cell cycle by dragging the yes and no
labels to the appropriate locations in the table.
Note: Assume that by the end of the M phase, the parent cell has not yet divided to form
two daughter cells. - Answer- Are sister chromatid present in all or part of this phase?
As in most areas of biology, the study of mitosis and the cell cycle involves a lot of new
terminology. Knowing what the different terms mean is essential to understanding and
describing the processes occurring in the cell. - Answer- 1. DNA replication produces
two identical DNA molecules, called SISTER
CHROMATID(S), which separate during mitosis.
2. After chromosomes condense, the CENTROMERE(S) is the region where the
identical DNA molecules are most tightly attached to each other.
3. During mitosis, microtubules attach to chromosomes at the KINETOCHORE(S)
4. In dividing cells, most of the cell's growth occurs during INTERPHASE
5. The MITOTIC SPINDLE(S) is a cell structure consisting of microtubules, which forms
during early mitosis and plays a role in cell division.
6. During interphase, most of the nucleus is filled with a complex of DNA and protein in
a dispersed form called CHROMATIN
7. In most eukaryotes, division of the nucleus is followed by CYTOKINESIS, when the
rest of the cell divides.
8. The CENTROSOME(S) are the organizing centers for microtubules involved in
separating chromosomes during mitosis.
The cell cycle represents the coordinated sequence of events in the life of a cell from its
formation to its division into two daughter cells. Most of the key events of the cell cycle
are restricted to a specific time within the cycle.
In this exercise, you will identify when various events occur during the cell cycle. Recall
that interphase consists of the G1, S, and G2 subphases, and that the M phase consists
of mitosis and cytokinesis. - Answer- a. non-dividing cells exit cell cycle
b. at this point, cell commits to go through the cycle
c. DNA replicate
d. centrosome replicates
e. mitotic spindle begins to form
f. cell divides, forming two daughter cells
As the chromosomes of a parent cell are duplicated and distributed to the two daughter
cells during cell division, the structure of the chromosomes changes.
Answer the three questions for each phase of the cell cycle by dragging the yes and no
labels to the appropriate locations in the table.
Note: Assume that by the end of the M phase, the parent cell has not yet divided to form
two daughter cells. - Answer- Are sister chromatid present in all or part of this phase?
