Download Practice Chapter 12

Practice Chapter 12
Name___________________________________
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Use the following information to answer the questions below.
Figure 12.1 shows a diploid cell with four chromosomes. There are two types of chromosomes, one long and the other short. One
haploid set is symbolized by unbroken lines, while the other haploid set is represented by dotted lines. At this time, the
chromosomes have not yet replicated. Now, choose the correct chromosomal conditions for the following stages:
Figure 12.1
1) at metaphase of mitosis
2) a possible daughter cell of mitosis
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
3) A cell containing 92 chromatids at metaphase of mitosis would, at its completion, produce two nuclei
containing how many chromosomes?
A) 92
B) 23
C) 12
D) 46
E) 16
1
Use the data in Table 12.1 to answer the following questions.
The data below were obtained from a study of the length of time spent in each phase of the cell cycle by cells of three eukaryotic
organisms, designated beta, delta, and gamma.
Table 12.1: Minutes Spent in Cell Cycle Phases
Cell Type
Beta
Delta
Gamma
G1
18
100
18
S
24
0
48
G2
12
0
14
M
16
0
20
4) Of the following, the best conclusion concerning the difference between the S phases for beta and gamma is
that
A) beta and gamma contain the same amount of DNA.
B) gamma contains more DNA than beta.
C) gamma contains 48 times more DNA and RNA than beta.
D) beta contains more RNA than gamma.
E) beta is a plant cell and gamma is an animal cell.
5) The best conclusion concerning delta is that the cells
A) are actually in the G0 phase.
B) contain no RNA.
C) contain no DNA.
D) contain only one chromosome that is very short.
E) divide in the G1 phase.
6) All of the following occur during mitosis except
A) the disappearance of the nucleolus.
B) the condensing of chromosomes.
C) the synthesis of DNA.
D) the uncoupling of chromatids at the centromere.
E) the formation of a spindle.
7) How do the daughter cells at the end of mitosis and cytokinesis compare with their parent cell when it was
in G1 of the cell cycle?
A) The daughter cells have the same number of chromosomes and twice the amount of DNA.
B) The daughter cells have half the amount of cytoplasm and half the amount of DNA.
C) The daughter cells have the same number of chromosomes and half the amount of DNA.
D) The daughter cells have half the number of chromosomes and half the amount of DNA.
E) The daughter cells have the same number of chromosomes and the same amount of DNA.
8) The formation of a cell plate is beginning across the middle of a cell and nuclei are re-forming at opposite
ends of the cell. What kind of cell is this?
A) an animal cell undergoing cytokinesis
B) an animal cell in metaphase
C) a plant cell in metaphase
D) a plant cell undergoing cytokinesis
E) an animal cell in telophase
2
9) Cells that are in a nondividing state are in which phase?
A) M
B) S
C) G2
D) G1
E) G0
10) What are enzymes called that control the activities of other proteins by phosphorylating them?
A) chromatin
B) ATPases
C) kinases
D) cyclins
E) protein kinases
11) Asexual reproduction requires __________ individual(s).
A) 4
B) 1
C) 0
12) Chromosomes are aligned along the cell's equator during
A) anaphase.
B) prometaphase.
C) prophase.
D) metaphase.
E) interphase.
3
D) 3
E) 2
Answer Key
Testname: CHAPT_12.TST
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
Answer:
Answer:
Answer:
Answer:
Answer:
Answer:
Answer:
Answer:
Answer:
Answer:
Answer:
Answer:
B
A
D
B
A
C
E
D
E
C
B
D
1