Download Chapter 8 Sample Questions: MITOSIS (there is another set for

Chapter 8 Sample Questions: MITOSIS (there is another set for meiosis!)
1.
Most of an organism's DNA is carried by its _____.
A.
nucleoli
B.
mitochondria
C.
chromosomes
D.
endoplasmic reticulum
E.
ribosomes
2.
Replication of all the chromosomal DNA occurs _____.
A.
whenever a cell needs RNA
B.
to repair gene damage caused by mutation
C.
in the cytoplasm of a eukaryotic cell
D.
before a cell divides
E.
whenever a cell makes protein
3. With the exception of the gametes, a human cell contains _____ chromosomes.
A.
46
B.
23
C.
47
D.
N
E.
2n
4. Mitosis and cytokinesis result in the formation of ______; meiosis and cytokinesis result in the formation
of _______________________
A.
four haploid cells ... two diploid cells
B.
two diploid cells ... two haploid cells
C.
two diploid cells ... two diploid cells.
D.
two diploid cells ... four haploid cells
E.
four diploid cells ... four haploid cells
5. A human bone marrow cell, in prophase of mitosis, contains 46 chromosomes. How many chromatids
does it contain altogether?
A.
46
B.
23
C.
46 or 92, depending on when during prophase you look
D.
92
E.
23 or 46, depending on when during prophase you look
6. It is difficult to observe individual chromosomes with a light microscope during interphase because
_____.
A.
they leave the nucleus and are dispersed to other parts of the cell
B.
the DNA has not been replicated yet
C.
they are uncoiled as long, diffuse, thin strands
D.
the spindle must move them to the metaphase plate before they become visible
E.
sister chromatids do not pair up until division starts
7. Chromatids are _____.
A.
held together by the centrioles
B.
composed of RNA
C.
microtubules
D.
identical copies of each other if they are part of the same chromosome
E.
found only in aberrant chromosomes
8. DNA replication occurs _____.
A.
in the G1 phase of interphase
B.
in the S phase of interphase
C.
in metaphase of meiosis only
D.
in prophase of both mitosis and meiosis
E.
in the cytokinesis portion of the cell's life cycle
9. Cytokinesis refers to _____.
A.
reduction in the number of chromosomes
B.
replication of the entire cell
C.
division of the nucleus
D.
cell death
E.
division of the cell’s cytoplasm and organelles, (not including the nucleus)
10. At which point in the cell cycle do centrosomes (or centrioles is fine) begin to move apart to two poles
of the cell in a dividing human liver cell?
A.
prophase
B.
G2 phase
C.
S phase
D.
metaphase
E.
anaphase
11. The phase of mitosis during which the chromosomes move toward separate poles of the cell is _____.
A.
prophase
B.
anaphase
C.
telekinesis
D.
telophase
E.
metaphase
12. One event occurring during prophase is _____.
A.
division of the centromere
B.
the synthesis of a new nuclear envelope
C.
the alignment of chromosomes in a single plane
D.
cytokinesis
E.
the beginning of the formation of the mitotic spindle
13. At which stage of mitosis are chromosomes lined up in one plane in preparation for their separation to
opposite poles of the cell?
A.
anaphase
B.
prophase
C.
telophase
D.
metaphase
E.
interphase
14. You would know a dividing cell was a plant cell rather than an animal cell if you saw that it had
A.
mitochondria
B.
microtubules
C.
formed a cell plate
D.
formed a cleavage furrow
E.
two pairs of centrioles during prophase
15. When we say that an organism is haploid, we mean that _____.
A.
its cells each have one chromosome
B.
it has one half of a chromosome
C.
its cells each have one set of chromosomes
D.
none of the above
E.
its cells each have three sets of chromosomes
16. The diploid phase of the human life cycle begins with _____.
A.
Fertilization (fusion of egg and sperm)
B.
meiosis
C.
mitosis
D.
a chromosomal mutation
E.
the first division of the zygote
17. What is the typical result when a diploid cell undergoes meiosis?
A.
two diploid cells
B.
two haploid cells and two diploid cells
C.
four haploid cells
D.
four diploid cells
E.
two haploid cells
Answers:
1. C
2. D
3. A
4. D
5. D
6. C
7. D
8. B
9. E
10. A
11. B
12. E
13. d
14. c
15. c
16. a
17. c