1.
How many steps are in the entire cell cycle?
Correct Answer
D. 6
Explanation
The entire cell cycle consists of six steps: G1 phase, S phase, G2 phase, mitosis, cytokinesis, and G0 phase. Each step plays a crucial role in the cell's growth, replication of DNA, preparation for division, actual division, and resting phase. Therefore, the correct answer is 6.
2.
What is the longest step of the cell cycle?
Correct Answer
A. InterpHase
Explanation
Interphase is the longest step of the cell cycle because it consists of three stages: G1 (gap 1), S (synthesis), and G2 (gap 2). During G1, the cell grows and carries out its normal functions. In the S phase, DNA replication occurs, resulting in the duplication of the cell's genetic material. Finally, in G2, the cell continues to grow and prepares for cell division. Overall, interphase is a crucial period for the cell to grow, replicate its DNA, and prepare for division, making it the longest step of the cell cycle.
3.
How many daughter cells are produced and the end of mitosis?
Correct Answer
B. 2
Explanation
During mitosis, a single cell divides into two identical daughter cells. This process involves several stages, including prophase, metaphase, anaphase, and telophase. At the end of mitosis, the two daughter cells are formed, each containing the same number of chromosomes as the parent cell. Therefore, the correct answer is 2.
4.
During which phase of the cell cycle is the genetic material copied (replicated)?
Correct Answer
A. InterpHase
Explanation
During the interphase of the cell cycle, the genetic material is copied or replicated. Interphase is the longest phase of the cell cycle and is divided into three stages: G1 phase, S phase, and G2 phase. In the S phase, DNA replication takes place, where the genetic material is duplicated so that each daughter cell will receive a complete set of chromosomes. This is necessary for cell division to occur successfully in the subsequent phases of the cell cycle.
5.
Click TWO (2) answers that are true about the daughter cells produced by mitosis.
Correct Answer(s)
A. They are identical to the other cell.
D. They are identical to the parent cell that produced them.
Explanation
The daughter cells produced by mitosis are identical to each other because they result from the division of a single parent cell. Additionally, they are identical to the parent cell that produced them because they contain the same genetic information.
6.
Which organelle helps directly with cell division?
Correct Answer
B. Centrioles
Explanation
Centrioles are the organelles that directly assist with cell division. They are found in animal cells and play a crucial role in organizing the microtubules that form the spindle fibers during cell division. The spindle fibers help separate the chromosomes and ensure that each daughter cell receives the correct number of chromosomes. Without centrioles, cell division would not occur properly, leading to genetic abnormalities and potential cell death. Mitochondria, vacuoles, and the Golgi body do not have a direct role in cell division.
7.
Click ALL the reasons cell reproduction is necessary.
Correct Answer(s)
A. Grow
C. Repair (heal)
D. Develop
Explanation
Cell reproduction is necessary for growth because as cells divide, the body can increase in size and add more cells to different tissues and organs. It is also necessary for repair or healing, as damaged or injured tissues can be replaced by new cells. Lastly, cell reproduction is crucial for development, as it allows for the formation of specialized cells and tissues during embryonic growth and maturation.
8.
Which letter represents Metaphase?
Correct Answer
C. C
Explanation
The letter C represents Metaphase.
9.
Which letter represents Telophase?
Correct Answer
E. E
Explanation
Telophase is the final stage of cell division, specifically in mitosis and meiosis. During telophase, the chromosomes reach opposite poles of the cell, and a new nuclear membrane begins to form around each set of chromosomes. In the given options, letter E represents Telophase.
10.
Which letter represents Anaphase?
Correct Answer
F. F
11.
Which letter represents Prophase?
Correct Answer
D. D
Explanation
The letter D represents Prophase. Prophase is the first stage of mitosis, where the chromatin condenses into visible chromosomes, the nuclear envelope breaks down, and the spindle fibers begin to form.
12.
Which of these would NOT be a reason for cell reproduction?
Correct Answer
B. To metabolize
Explanation
Cell reproduction is not necessary for metabolism. Metabolism refers to the chemical processes that occur within a living organism to maintain life, such as the breakdown of food for energy and the elimination of waste products. While cell reproduction is essential for growth, repair, and the production of unicellular organisms, it is not directly involved in metabolism.