BSC 2010 0M04 Quiz (Chapter 12) ​Solutions
*Disclaimer: I have made these problems to the best of my ability. However, this is only an
overview. Not all information/answers are guaranteed to be accurate, and this information may
or may not apply to your class exam. ☺
1. Which of the following describes the process that unicellular prokaryotic organisms use
to divide?
a. Meiosis
b. Binary Fission
c. Mitosis
d. Transcription
2. Which of the following refers to chromatin further organized into discrete structures that
encode genetic information (genes)?
a. Nucleosome
b. Chromosome
c. Centrosome
d. Centromere
3. If a new found animal has a haploid number of 60, what is its diploid number, and would
the diploid number be the number of chromosomes found in gametes or somatic cells?
a. The diploid number would be n=120, and these are somatic cells
b. The diploid number would be 2n=120, and these are gametes cells
c. The diploid number would be n=30, and these are gametes cells
d. The diploid number would be 2n=120, and these are somatic cells
4. In a karyotype, how many pairs of autosomes does a human have?
a. 22
b. 23
c. 24
d. 46
5. Which parent determines the sex of a child?
a. The mother
b. The father
6. In a karyotype, how many pairs of sex chromosomes does a human have?
a. 1
b. 23
c. 46
d. 2
7. Which of the following best describes metaphase of mitosis?
a. DNA begins to replicate
b. Chromosomes move toward the center or equator of the cell and chromatids have
not separated
c. Centrioles begin to move toward opposite poles of the cell
d. Two distinct cells begin to form and separate
8. During which phase of mitosis do sister chromatids separate?
a. Prophase
b. Telophase
c. Anaphase
d. Metaphase
9. During which phase of mitosis do chromatids condense?
a. Telophase
b. Anaphase
c. Prophase
d. Metaphase
10. During which phase of the cell cycle is the nuclear envelope not intact?
a. G1 phase
b. Telophase
c. Anaphase
d. S phase
11. Which choice below properly matches the stage of mitosis with its description?
a. Telophase: Formation of two nuclei
b. Metaphase: The cell elongates and cohesion proteins begin to denature
c. Prophase: Chromosomes line up along the metaphase plate
d. Anaphase: Chromatin condenses and microtubules form
12. What is a centromere?
a. An organelle that organizes microtubules
b. The site of association of sister chromatids
c. A protein that holds sister chromatids together
d. A protein made mostly of keratin
13. T or F. Gametes are diploid cells such as egg and sperm, and there is only one pair of
each chromosome.
a. True
b. False
14. Which of the following is the complex of proteins at which the mitotic spindle will attach
to the chromosomes, one microtubule from each side?
a. Centrosome
b. Centromere
c. Cohesion
d. Kinetechore
15. Which of the following refers to DNA and proteins organized as cylindrical fibers?
a. Nucleosome
b. Chromatin
c. Chromosome
d. Centrosome
16. The mature form of a newly discovered species of eukaryote contains 12 chromosomes
and exists in the diploid state (2n=12). In this new species, how many chromosomes are
present in a mitotic cell immediately after anaphase?
a. 12
b. 6
c. 24
d. 18
17. During which of the following mitotic phases will a cell be haploid?
a. Prophase
b.
c.
d.
e.
Anaphase
Metaphase
Telophase
None of the above
i.
Recall that a cell is diploid if it possesses pairs of homologous
chromosomes. During mitosis, this is always the case.
18. Human somatic cells have how many chromosomes?
a. 23
b. 24
c. 46
d. 47
19. Human gametic cells will have how many chromosomes?
a. 23
b. 24
c. 46
d. 47
20. Which of the following does not happen during anaphase of mitosis?
a. Chromosome condensation
b. Sister chromatid separation
c. Migration of chromosomes towards opposite ends of the spindle
d. Chromosome number is doubled for a brief period
21. Which of the following is not involved in mitosis?
a. Sister chromatids separate
b. Crossing over
c. Chromosome condensation
d. Nuclear membrane disintegrates
22. Which of the following does not occur during interphase?
a. Cell growth during the G1 phase and the G2 phase
b. Chromosome duplication during the S phase
c. Normal cell functioning during the G1 phase
d. Presence of sister chromatids in the G1 phase
23. T or F. The mitotic phase is where the cell spends most of its time during cell division.
a. True
b. False
24. A somatic cell has 16 chromosomes (2n=16), how many chromosomes and chromatids
are present at….
a. G1 phase?
16 chromosomes
b. S phase?
16 chromosomes, 32 chromatids (16 pairs)
c. G2 phase?
16 chromosomes, 32 chromatids (16 pairs)
d. Prophase?
16 chromosomes, 32 chromatids (16 pairs)
e. Metaphase?
16 chromosomes, 32 chromatids (16 pairs)
f. Anaphase?
32 chromosomes, 16 moving to each end
g. Telophase?
16 chromosomes in each daughter nucleus
h. After cytokinesis?
16 chromosomes in each daughter cell
25. Which term refers to a complex of histone protein and DNA wrapped around it?
a. Nucleosome
b. Chromatin
c. Chromosome
d. Nucleus
26. If a new animal is found in which somatic cells have 50 chromosomes each, how many
chromosomes would you find in a sperm cell of that same animal?
a. 100
b. 50
c. 25
d. None of the above
27. Which of the following explains why plant cells cannot just cleave in the same way that
animal cells can?
a. The chloroplast
b. The cell wall
c. The central vacuole
d. There is no difference between the way that plant and animals cells divide
28. When referring to the paternal and maternal versions of chromosome 3, we can call them
_____ in relation to each other.
a. Sister Chromatids
b. Homologous
c. Exactly identical
d. None of the above
29. Which of the following is not something checked at the Gap 1 checkpoint in Mitosis?
a. Cell size
b. DNA damage
c. Growth Factor
d. Attachment of kinetochores
e. Nutrients
30. If a cell does not meet the requirements checked for at the G1 checkpoint, what happens?
a. The cell will die because it can no longer carry out division
b. The cell will still replicate in S phase, but will not divide
c. The cell will continue to grow until it eventually will lyse
d. The cell will enter a resting state where it can later resume dividing if conditions
improve
31. Which of the following ​best describes why a cancer cell can move from one part of the
body to another and continue replicating in its new location?
a. It has lost its anchorage dependence
b. It has lost its density dependence
c. The G1 checkpoint is functioning over efficiently, causing uncontrollable growth
d. The M phase checkpoint is not working properly, so improper chromosome
numbers will be sorted into newly made cells
32. Which of the following makes up the Mitosis promoting factor?
a. Cyclin
b. Cyclin Dependent Kinase (CdK)
c. Kinetechores
d. All of the above
e. A and B
33. How does cyclin dependent kinase activate or inactivate cyclin?
a. Phosphorylation
b. Increased pH
c. Phosphodiester Linkages
d. Increased temperature
34. Which of the following will signal to the cell that it can start to end Mitosis?
a. The Gap 1 Checkpoint
b. Cyclin levels will decrease
c. MPF activity will increase
d. The cells will become anchorage dependent
e.
Congratulations on making it through the practice quiz! I hope you did well ☺ If you have any
questions at all on solutions or concepts, just come visit me in SI! My hours are attached below.
Just make sure to have at least attempted the problems beforehand.
Works Cited
"Understanding the Cell Cycle - AP Biology." ​Understanding the Cell Cycle - AP Biology.
Varsity Tutors, n.d. Web. 07 Mar. 2017.