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Chapter 10: Q. 6 (page 276)
Identical copies of chromatin held together by cohesin at the centromere are called _____.
a. histones.
b. nucleosomes.
c. chromatin.
d. sister chromatids.
The correct option is D.
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Attachment of the mitotic spindle fibers to the kinetochores is a characteristic of which stage of mitosis?
a. prophase
b. prometaphase
c. metaphase
d. anaphase
Many of the negative regulator proteins of the cell cycle were discovered in what type of cells?
a. gametes
b. cells in G0
c. cancer cells
d. stem cells
A gene that codes for a positive cell-cycle regulator is called a(n) _____.
a. kinase inhibitor.
b. tumor suppressor gene.
c. proto-oncogene.
d. oncogene.
Unpacking of chromosomes and the formation of a new nuclear envelope is a characteristic of which stage of mitosis?
a. prometaphase
b. metaphase
c. anaphase
d. telophase
A diploid cell has_______ the number of chromosomes as a haploid cell.
a. one-fourth
b. half
c. twice
d. four times
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