BS 161: Chapter 11 Homework Questions

Match each of the following cellular processes with the phase of the cell cycle in which it occurs. Each cellular process may be used once, multiple times, or not at all. Cellular processes: A. separation of genetically identical daughter cells B. expression of regulatory proteins and enzymes required for replication C. synthesis of cell components required for mitosis D. separation of replicated chromosomes so that each daughter cell gets the same complement of chromosomes E. replication of DNA 1. First gap phase 2. Second gap phase 3. S phase 4. M phase 5. Cytokinesis

1. First gap phase: Expression of regulatory proteins and enzymes required for replication 2. Second gap phase: Synthesis of cell components required for mitosis 3. S phase: Replication of DNA 4. M phase: Separation of replicated chromosomes so that each daughter cell gets the same complement of chromosomes 5. Cytokinesis: Separation of genetically identical daughter cells

The CORRECT sequence of steps in the eukaryotic cell cycle is: G0 → S phase → G1 → S phase → G2 → mitosis → cytokinesis. G1 → S phase → G2 → cytokinesis → mitosis. G0 → S phase → G1 → S phase → G2 → cytokinesis → mitosis. G0 → S phase → G1 → G2 → cytokinesis → mitosis. G1 → S phase → G2 → mitosis → cytokinesis.

G1 → S phase → G2 → mitosis → cytokinesis.

Paired chromosomes in a cell that share the same set of genes are called: bivalent chromosomes homologous chromosomes sister chromatids non-sister chromatids

homologous chromosomes

Prokaryotic cells and eukaryotic cells reproduce by mitotic cell division. Regardless of the type of cell, all cells must _____ before they divide. reconstruct their nucleus separate sister chromatids from one another complete mitosis make a copy of their genetic information

make a copy of their genetic information

The two molecules of double-stranded DNA in a replicated chromosome are called: non-sister chromatids bivalent chromosomes sister chromatids homologous chromosomes

sister chromatids

All of the following happen during mitosis EXCEPT: separation of sister chromatids at the centromeres. condensing of chromosomes. formation of the spindle. synthesis of DNA.

synthesis of DNA

The region of a replicated chromosome where sister chromatids remain attached is called the: kinetochore centrosome centromere chiasmata

centromere