bio 2

Which of the following is a correct association?

• S stage-cell growth

• G2 stage-the cell synthesizes the proteins needed for cell division

• G, stage-cytokinesis

In plant cells, what is responsible for organizing the spindle?

• centrosomes

• centrioles

• asters

Which components of a cell membrane are used for cell-to-cell recognition?

• glycoproteins

• phospholipids

• channel proteins

Upon examination, a cell is found to have twice as much DNA as the normal diploid state but is no longer in the process of replicating the DNA. All of the DNA is found within a single nucleus. Which phase of the cell cycle is this cell in?

• G2

• S

• G1

During crossing-over

• chromatin becomes chromosomes.

• chromatids exchange segments of genetic material.

• mitosis becomes meiosis.

What lines up during metaphase Il of meiosis and metaphase of mitosis?

• Metaphase Il of meiosis: individual chromosomes composed of two sister chromatids

  Metaphase of mitosis: homologous chromosomes

• Metaphase Il of meiosis: individual chromosomes composed of two sister chromatids

  Metaphase of mitosis: individual chromosomes each composed of one sister chromatid

• Metaphase Il of meiosis: individual chromosomes each composed of two sister chromatids

  Metaphase of mitosis: individual chromosomes each composed of two sister chromatids

What is the difference between the chromosomes in a secondary spermatocyte and those in a spermatid?

• The secondary spermatocyte is diploid; the spermatid is haploid.

• The chromosomes in secondary spermatocytes consist of two chromatids; the ones in the spermatid consist of only one chromatid.

• The secondary spermatocyte is haploid; the spermatid is diploid.

Which of the following is the correct sequence for the cell cycle?

• S-G1-M-G2

• S-M-G1-G2

• G1-S-G2-M

What lines up at the metaphase plate during both metaphase I of meiosis and metaphase of mitosis?

• Metaphase 1 of meiosis: single chromosomes composed of two sister chromatids

  Metaphase of mitosis: single chromosomes composed of two sister chromatids

• Metaphase 1 of meiosis: homologous chromosomes

  Metaphase of mitosis: chromosomes composed of two sister chromatids

Upon examination, a cell is found to have twice as much DNA as the normal diploid state but is no longer in the process of replicating the DNA. All of the DNA is found within a single nucleus. Which phase of the cell cycle is this cell in?

• G2

• S

• G1