Biology, Eighth Edition (Raven)

Chapter 10: How Cells Divide

Pre Test

1
Which term best describes how bacteria divide? (p. 186)
A)Binary fission
B)Mononuclear fusion
C)Meiosis
D)Mitosis
E)Septum lysis
2
A visual arrangement of all the chromosomes in a cell is called a (p. 190)
A)Sister chromatid
B)Replicon
C)Karyotype
D)Mitotic bundle
E)Divisosome
3
True or False: The cell spends most of its time in the G1 phase of the cell cycle. (p. 191)
A)True
B)False
4
What is the name for the position at which the chromosome is constricted so that the sister chromatids are manipulated as a unit? (p. 192)
A)Centrosome
B)Telomere
C)Kinetochore
D)Centromere
E)Cohesion
5
A cell described as 2N (diploid) with a chromosome content of 14 (14 chromosomes) is undergoing cell division. The convention is to say "the cell is 2N=14". An easy way to determine the number of chromosomes is to just count the number of centromeres. Which is the best description of a diploid cell at metaphase? (p. 193)
A)4N = 28
B)2N = 7
C)N = 7
D)2N = 14
E)It is impossible to tell from the information given
6
Why is cell division in plants so different from that in animals? (p. 196)
A)Plants are unrelated to animals, so they have evolved different ways for their cells to divide
B)Animals use their kinetic energy of motion to coax the cells into splitting
C)The cell wall on around each plant cell prevents constriction of the plasma membrane to cause the cells to divide
D)Animal cells lack cellulose, and so a different method of splitting the cells had to be devised
E)Organelles won't be properly positioned in plants because they are static, unchanging creatures
7
What does cyclin do? (p. 198)
A)It targets disease and causes "sick" cells to destroy themselves.
B)It accumulates so that the cell can assess how much of it there is. This can stimulate cell division.
C)Cyclin is involved in repair of mutated genetic loci.
D)Cyclin proteins bind to mistakes in the DNA to trigger repair enzymes
E)It's an inhibitor protein to prevent cells from dividing too quickly. As its concentration decreases, cells tend to divide more frequently.
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