1.
What is the image labeled 'A' in the picture?
Correct Answer
A. Centrioles
Explanation
'A' identifies centrioles. Centrioles are used during cell division of animal cells. 'B' identifies the chromosome. 'C' identifies the spindle fibers that are used in moving chromosomes during cell division.
2.
What is the image labeled 'C' in the picture?
Correct Answer
D. Spindle Fibers
Explanation
'A' identifies centrioles. Centrioles are used during cell division of animal cells.
'B' identifies the chromosome.
'C' identifies the spindle fibers that are used in moving chromosomes during cell division.
3.
What is the image labeled 'c' in the picture?
Correct Answer
B. Chromatid
Explanation
'A' identifies an entire chromosome. 'B' identifies a centromere. A centromere holds two sister chromatids together. 'C' identifies a chromatid. 'D' identifies homologous chromosomes. Homologous chromosomes paired together form a tetrad.
4.
What phase of mitosis is this image depicting?
Correct Answer
C. AnapHase
Explanation
During Anaphase, sister chromatids are separated at their centromere and pulled to opposite poles of the dividing cell.
5.
What phase of the cell cycle is the image depicting?
Correct Answer
C. InterpHase
Explanation
Interphase is the only stage in the cell cycle in which chromatin is visible. Looking at the nucleus, the chromosomes are in a relaxed form known as chromatin.
6.
What phase of the cell cycle is this image depicting?
Correct Answer
A. Cytokinesis
Explanation
Cytokinesis is the stage in the cell cycle in which a dividing cell is finally split into two daughter cells that immediately reenter Interphase.
7.
What phase is this image depicting?
Correct Answer
A. AnapHase I
Explanation
Anaphase I is indicated because there is whole chromosome movement to the opposite poles of the dividing cell.
8.
What phase is this image depicting?
Correct Answer
D. TelopHase I
Explanation
Telophase I is indicated because there is only one cell currently dividing into two. Also, we can definitively say that it is not "telophase" of mitosis because the crossing over event has occurred resulting in the two-toned chromosome color.
9.
What phase of mitosis is this image depicting?
Correct Answer
D. TelopHase
Explanation
Telophase is indicated because one parent cell is dividing into two daughter cells. The daughter cells contain single chromatids and have not undergone crossing over.
10.
Asexual reproduction is a process by which a single parent reproduces by itself.
Correct Answer
A. True
Explanation
Asexual reproduction occurs when one parent divides or gives rise to genetically identical offspring.
11.
The G2 phase is when the DNA replicates.
Correct Answer
B. False
Explanation
Although the G2 phase is part of Interphase, it is characteristic of cellular growth and preparation for mitosis.
The S phase of Interphase is characterized by replication of DNA.
12.
Mitosis results in the formation of which of the following?
Correct Answer
A. 2 genetically identical daughter cells
Explanation
Mitosis is the process by which a parent cell gives rise to two genetically identical daughter cells. This process is done so that somatic cells can grow and repair damaged cells.
13.
Binary fission is an example of asexual reproduction.
Correct Answer
A. True
Explanation
Binary fission is one of the seven types of asexual reproduction that are discussed in chapter 9. Binary fission is the simplest of asexual reproduction and is done by both bacteria and paramecium.
14.
Budding is an example of sexual reproduction.
Correct Answer
B. False
Explanation
Budding is one of the seven examples of asexual reproduction discussed in chapter 9. Budding is carried out when cells grow on the parent organism and eventually pinch off and fall to the surface. Once on the surface, these cells grow an organism identical to the parent organism. Hydra, sea anemones and yeast are all examples of organisms that reproduce asexually by budding.
15.
What stage of interphase do cells do most of their growing?
Correct Answer
A. G1
Explanation
G1, S, and G2 are the only answer choice that are part of Interphase. G1 is characteristic of doubling the cytoplasm of the parent cell; it has the most growth.
16.
How do plant cells perform cytokinesis?
Correct Answer
B. By making a cell plate
Explanation
Plant cells differ from animal cells in that during cytokinesis they must form a cell plate that functions to divide the cytoplasms of the two new daughter cells.
17.
Cells spend most of their time in what phase?
Correct Answer
D. InterpHase
Explanation
The cell cycle includes: Interphase, Mitosis, and Cytokinesis. Of these three stages, a cell spends an estimated 90% of its life cycle in Interphase.
18.
A protein called p53 can keep cells from dividing. To prevent cell division, the protein most likely stops ___.
Correct Answer
B. Mitosis
Explanation
Mitosis is the division of the nucleus. If a protein is preventing cell division, it would prevent the cell (nucleus) from dividing.
It would not prevent the cell from diffusing water across the membrane (osmosis), changing its DNA (mutation), or breaking down sugars to form usable energy (respiration).
19.
The two main stages of the cell cycle are called
Correct Answer
A. Mitosis and interpHase
Explanation
The cell cycle includes: Interphase, Mitosis, and Cytokinesis. Of these three stages, interphase and mitosis are the main stages. Although important, cytokinesis is not a main stage in the cell cycle.
20.
What phase does the nuclear membrane disappear and the DNA coils up into chromosomes?
Correct Answer
C. PropHase
Explanation
Prophase is characterized by the nuclear membrane disintegrating, the centrioles moving to opposite poles and forming spindle fibers, as well as DNA condensing into the visible form (chromosomes).
21.
Which of the following is an advantage of sexual reproduction?
Correct Answer
D. Lots of genetic diversity
Explanation
Sexual reproduction is the process by which a male gamete and a female gamete join to form a new organism. The new organism will contain genetic material from both the male and female parent. Because this process requires two parents, it is slow and requires lots of energy.
22.
During what phase of mitosis do sister chromatids attached at the centromere first separate from one another as they begin to move toward the cell poles?
Correct Answer
A. AnapHase
Explanation
By definition, Anaphase is characterized by the separation of sister chromatids at the centromere to opposite poles of the dividing cell.
23.
What is the item labeled 'b' pointing to?
Correct Answer
A. Centromere
Explanation
'A' identifies an entire chromosome.
'B' identifies a centromere. A centromere holds two sister chromatids together.
'C' identifies a chromatid.
'D' identifies homologous chromosomes. Homologous chromosomes paired together form a tetrad.
24.
Which of the following shows the labeled pictures in the image in the correct order?
Correct Answer
B. 4, 3, 6, 5, 1, 2
Explanation
4. Interphase
3. Prophase.
6. Metaphase
5. Anaphase
1. Telophase
2. Cytokinesis
Number 7 is pointing to the cell plate.
25.
What is the item labeled '7' pointing to?
Correct Answer
A. Plant cell's cell plate
Explanation
1. Telophase
2. Cytokinesis
3. Prophase
4. Interphase
5. Anaphase
6. Metaphase
Number 7 is pointing to the cell plate. Cell plates can only be found in plant cells.
26.
When during the cell cycle are chromosomes visible?
Correct Answer
C. Only during cell division
Explanation
Chromosomes are only visible during the division of the cell (Mitosis). Chomatin condenses into visible chromosomes during prophase and then relaxes into chromatin during telophase.
27.
During normal mitotic cell division, a parent cell that has four chromosomes will produce two daughter cells, each containing
Correct Answer
B. Four chromosomes
Explanation
Mitotic cell division (Mitosis) is characterized of producing two genetically identical daughter cells. Meaning, if your skin cells contain 46 chromosomes and they divide, the resulting two cells will also contain 46 chromosomes.
28.
During which phase of the cell cycle does mitosis happen?
Correct Answer
C. M pHase
Explanation
Interphase contains the stages: G1, S, and G2
M phase represents either Mitosis (somatic cells) or Meiosis (gametes).
29.
Which phase of meiosis does crossing over occur?
Correct Answer
A. PropHase I
Explanation
Crossing over is the exchange of genetic material between homologous chromosomes that occurs during Prophase I or Meiosis I.
30.
Meiosis results in
Correct Answer
B. 4 Hapoid Cells
Explanation
Meiosis is the process by which gametes (sex cells) are produced. Gametes are haploid, meaning they contain only half the number of chromosomes as the parent cell. The reason for this is because gametes from the male and female parents will join together to form a zygote (fertilized egg) that has a diploid number of chromosomes.
31.
In oogenesis, how many ova will be produced?
Correct Answer
A. 1
Explanation
In oogenesis, 1 ova (egg cell) is produced. Three polar bodies are also produced, but they are unusable and will be reabsorbed by the female.
32.
If a somatic cell has 30 chromosomes, how many chromosomes will be present after meiosis?
Correct Answer
A. 15
Explanation
Meiosis is the process by which gametes (sex cells) are produced. Gametes are haploid, meaning they contain only half the number of chromosomes as the parent cell. If the parent diploid cell contains 30 chromosomes, then the gamete will contain half that and have 15 chromosomes.
33.
If an organism has 20 chromosomes and reproduces sexually, how many chromosomes will be in its gamete?
Correct Answer
B. 10
Explanation
Meiosis is the process by which gametes (sex cells) are produced. Gametes are haploid, meaning they contain only half the number of chromosomes as the parent cell. If the parent cell has 20 chromosomes, the gamete produced by Meiosis will only have half of that number. The gamete will have 10 chromosomes.
34.
Which of the following reproduces via budding?
Correct Answer
A. Hydra
Explanation
Hydra reproduces via budding, which is a form of asexual reproduction. In budding, a small bud grows on the body of the parent organism and eventually detaches to become a new individual. This process allows for the rapid production of offspring without the need for a mate. Therefore, Hydra is the correct answer as it is the only organism listed that reproduces through budding.
35.
What is a type of asexual reproduction that occurs when a new plant grows from part of the parent plant?
Correct Answer
C. Vegetative Propagation
Explanation
Vegetative propagation is the form of asexual reproduction in which plants with creeping roots will be able to sprout identical plants along the ground. This occurs in grasses, strawberry plants, and some potatoes.
36.
What phase is the image provided depicting?
Correct Answer
B. PropHase II
Explanation
The image depicts Prophase II. We know this because we are looking at two cells that contain visible chromosomes and the spindle fibers are just starting to form.