7. Bacteria cells divide by a process called ____________________________(, whil

Question

7. Bacteria cells divide by a process called ____________________________(, while eukaryotic

cells divide by a more complicated process called _________________________.

8. You are making a video recording of 3 live cells under the microscope. You see all three cells

dividing once. You then wait a bit longer and see all cells dividing once more. How many cells

do you see now? ______________.

9. Animal cells typically achieve cytokinesis

A) By septum formation

B) By forming a cell plate across the middle of the cell

C) By forming a cleavage furrow that pinches the cell into two

D) By budding

E) With the help of mitotic spindle apparatus

10. You study the somatic cells of cats. At the START (G1/S)of the cell cycle, the cells each have

38 chromosomes. If the cells continue on to mitosis and cytokinesis, there will be two daughter

cells with _______ (indicate number) chromosomes.

11. You study the germline cells of cats as they undergo meiosis. At the beginning of prophase I,

a germline cell will have 38 condensed chromosomes containing two identical sister chromatids.

At prophase II, there will be _____________________________.

A) Two haploid cells, each with 19 unduplicated chromosomes

B) Two haploid cells, each with 19 duplicated chromosomes (sister chromatids still attached to

one another)

C) Two diploid cells, each with 38 unduplicated chromosomes

D) Four haploid cells, each with 38 duplicated chromosomes ( sister chromatids still attached to

one another)

E) Four haploid cells, each with 19 unduplicated chromosomes

12-13. Match the proteins or protein complexes with their function.

________ i. Cohesin

________ ii. Synaptonemal complex

________ i. Chiasma (plural: chiasmata)

________ i. Kinetochore

A) Allows synapsis (pairing) of homologous chromosomes to occur during prophase I

(prophase of meiosis I).

B) Helps join together the centromer of two sister chromatids in mitotic condensed

chromosomes; is destroyed during the transition from metaphase to anaphase.

C) Is found at the centromeres of chromosomes undergoing mitosis or meiosis and

serves as a molecular anchor to attach microtubule fibers to the chromosomes.

D) Is not a protein complex, but rather represents an entangled connection between

homologous chromosomes that is formed by homologous recombination and helps hold together

homologous chromosomes in metaphase I

14. Which of the following does not occur during meiosis I?

A) Crossing over occurs during prophase I

B) Homologous chromosomes pair up during prophase I

C) Homologous chromosomes separate during anaphase I

D) Sister chromatids separate during anaphase I

E) Only germline cells with duplicated chromosomes undergo meiosis I

F) At the end of meiosis I, cells proceed on to meiosis II without duplicating their DNA again

Explanation / Answer

7. bacteria by binary fission and eukaryotes by cell divison.

8. 12 cells.

9. b forming cell plate.

10. 38 chromosomes in each daughter cells.

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