Page 120 - Atlas of Histology with Functional Correlations

4. Kinetochores are located:

A. in the mitotic spindle.

B. on the chromosomes.

C. on each side of the centromere.

D. on the centrosome.

E. on the nuclear membrane.

5. What pulls the chromosomes apart during mitosis?

A. Centrioles

B. Kinetochore microtubules

C. Cleavage furrow

D. Centromeres

E. Mitotic spindle

ANSWERS

1. Correct Answer: A. Telophase. At this stage, the chromosomes condense
into chromatin. The nucleolus reappears, and a new nuclear envelope is
formed.

2. Correct Answer: B. Telophase. During this phase, cleavage of the joined
cells follows. Cytokinesis is the process resulting in two genetically
identical cells.

3. Correct Answer: C. Anaphase. During late anaphase of cell division, the
migrating chromosomes exhibit a cleavage furrow that indicates where the

cells will divide.

4. Correct Answer: A. Mitotic spindle. Microtubules of the mitotic spindle
attach to the platelike protein complex, the kinetochore.

5. Correct Answer: B. Kinetochore microtubules. Shortening of the
kinetochore microtubules pulls the chromosomes apart toward the opposite

poles of the cell during the continuing mitotic process.

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