Question

QUESTION 1

1. Match each of the following to the correct term.

   The "central body" responsible for maintaining and orienting the mitotic spindle. This "central body" replicates during S-phase.    A structure within the "central body" that consists of two microtubule triplet structures. Condensed complex between DNA and proteins as it is observed in cells. The degree of condensation varies in different cells and throughout the cell cycle. This term is nearly synonymous with chromosome, with the exception that "chromosome" does not necessarily assume any degree of condensation. The region of the chromosomes where the two duplicated copies of DNA are held together after the DNA is replicated but before mitosis. This may be near the center of the chromosome, but it doesn't have to be. A specialized complex of many different proteins that develops at the beginning of mitosis to hold the duplicated chromosomes together.

   A. kinetochore B. chromatin C. centrosome D. centromere E. centriole

2. Fill in the blanks: In a diploid organism, the two versions of a chromosome (one each from the mother and the father) are called  chromosomes (one word answer; must be spelled correctly). The two identical copies of DNA observed after DNA replication are called  (two word answer; again, must be spelled correctly).

3. QUESTION 3

4. Correctly match the sub-phases of M-phase with their descriptions.

   Alignment of chromosomes at equatorial plate Chromosome decondensation and nuclear envelope reformation Cell separation through formation of new membrane and/or cell wall Separation of chromatids and migration to opposite poles Condensation of chromosomes and mitotic spindle assembly

   A. Telophase B. Metaphase C. Anaphase D. Prophase E. Cytokinesis

Answer 1

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