1.
Mitosis ends at what stage?
Correct Answer
C. TelopHase
Explanation
Mitosis is the process of cell division, where a single cell divides into two identical daughter cells. It consists of several stages, including prophase, metaphase, anaphase, telophase, and cytokinesis. Telophase is the final stage of mitosis, where the two sets of chromosomes have reached the opposite poles of the cell and nuclear envelopes start to reform around each set. At this stage, the cell is preparing to fully separate into two daughter cells through cytokinesis.
2.
During what stage are chromosomes copied and appear like threadlike coils?
Correct Answer
B. InterpHase
Explanation
During interphase, chromosomes are copied and appear as threadlike coils. Interphase is the longest stage of the cell cycle and is divided into three sub-phases: G1 phase, S phase, and G2 phase. During the S phase, DNA replication occurs, resulting in the formation of identical sister chromatids connected by a centromere. These sister chromatids then condense and coil up, appearing as threadlike structures. Therefore, interphase is the stage in which chromosomes are copied and appear as threadlike coils.
3.
Cells begin to divide during __________________________.
Correct Answer
Prophase
Explanation
During prophase, the first stage of cell division, cells begin to divide. This is when the chromatin in the nucleus condenses and becomes visible as chromosomes. The nuclear membrane also starts to break down, and the spindle fibers begin to form. These changes indicate the start of cell division and mark the beginning of prophase.
4.
Chromatids (or pairs of chromosomes) attach to spindle fibers during this stage.
Correct Answer
E. MetapHase
Explanation
During metaphase, the pairs of chromatids (or chromosomes) align along the equator of the cell. This alignment is facilitated by the attachment of spindle fibers to the centromeres of the chromatids. The spindle fibers exert tension on the chromatids, causing them to align in a single file at the center of the cell. This alignment ensures that each daughter cell will receive an equal number of chromosomes during cell division.
5.
The picture shows a cell at what stage?
Correct Answer
A. AnapHase
Explanation
The picture shows a cell at the stage of Anaphase. During Anaphase, the sister chromatids of each chromosome separate and move towards opposite poles of the cell. This is evident in the picture where the chromosomes are seen pulled apart and moving towards the opposite ends of the cell.
6.
What type of cells are created during cytokenisis?
Correct Answer
D. Daughter
Explanation
During cytokinesis, the process of cell division, daughter cells are created. This is the final stage of cell division where the cytoplasm of the parent cell is divided into two separate daughter cells. These daughter cells are genetically identical to each other and to the parent cell. Therefore, the correct answer is "Daughter."
7.
List the stages of cell division in order from begninning to end.
Telophase
Interphase
Prophase
Cytokenisis
Anaphase
Metaphase
8.
Where does binary fission occur?
Correct Answer
B. Prokaryotes
Explanation
Binary fission is a form of asexual reproduction that occurs in prokaryotes, specifically bacteria and archaea. During binary fission, the prokaryotic cell divides into two identical daughter cells. This process does not involve a nucleus or centromere, as prokaryotes lack these structures. Therefore, the correct answer is "Prokaryotes."
9.
What is the longest period of the complete cell cycle?
Correct Answer
C. InterpHase
Explanation
Interphase is the longest period of the complete cell cycle. It is the phase where the cell prepares for division by growing, replicating its DNA, and carrying out normal cellular functions. During interphase, the cell spends a significant amount of time in the G1 phase, followed by the S phase where DNA replication occurs, and finally the G2 phase where the cell prepares for mitosis. This phase is crucial for the cell's growth and development, and it accounts for the majority of the cell cycle.