BIOS 251 EXAM SCRIPT UPDATED
COMPLETE QUESTIONS AND ANSWERS
EXPERT REVIEWED
●● The resting phase of mitosis. Cell grows, performs its normal
functions, and prepares for division; consists of G1, S, and G2 phases
Answer: Interphase
●● Cells that have left the cycle and cease dividing for a long time (or
permanently)
Answer: G Zero (G0) Phase
●● The first gap, or growth phase, of the cell cycle, consisting of the
portion of interphase before DNA synthesis begins.
Answer: G1 Phase
●● The synthesis phase of the cell cycle; the portion of interphase during
which DNA is replicated.
Answer: S Phase
●● The second gap, or growth phase, of the cell cycle, consisting of the
portion of interphase after DNA synthesis occurs.
,Growth and preparation for mitosis
Answer: G2 Phase
●● First and longest phase of mitosis, during which the chromosomes
become visible and the centrioles separate and take up positions on the
opposite sides of the nucleus
Answer: Prophase
●● Second phase of mitosis, during which the chromosomes line up
across the center of the cell
Answer: Metaphase
●● The third phase of mitosis, during which the chromosome pairs
separate and move toward opposite poles
Answer: Anaphase
●● The final phase of cell division, between anaphase and interphase, in
which the chromatids or chromosomes move to opposite ends of the cell
and two nuclei are formed.
Answer: Telophase
●● Division of the cytoplasm during cell division
Answer: Cytokinesis
, ●● Cell division that produces reproductive cells (gametes) in sexually
reproducing organisms
Answer: Meiosis
●● Compare and Contrast Mitosis and Meiosis
Answer: Mitosis produces two diploid (2n) somatic cells that are
genetically identical to each other and the original parent cell, whereas
meiosis produces four haploid (n) gametes that are genetically unique
from each other and the original parent (germ) cell.
●● Number of Chromosomes in Humans...
Answer: 46
●● Haploid Number of Chromosomes In Humans
Answer: 23
●● Control center of the cell; a part of the cell containing DNA and
RNA and responsible for growth and reproduction
Answer: Nucleus
●● Processes and transports proteins made at attached ribosomes;
synthesizes phospholipids
Answer: Rough Endoplasmic Reticulum (RER)
COMPLETE QUESTIONS AND ANSWERS
EXPERT REVIEWED
●● The resting phase of mitosis. Cell grows, performs its normal
functions, and prepares for division; consists of G1, S, and G2 phases
Answer: Interphase
●● Cells that have left the cycle and cease dividing for a long time (or
permanently)
Answer: G Zero (G0) Phase
●● The first gap, or growth phase, of the cell cycle, consisting of the
portion of interphase before DNA synthesis begins.
Answer: G1 Phase
●● The synthesis phase of the cell cycle; the portion of interphase during
which DNA is replicated.
Answer: S Phase
●● The second gap, or growth phase, of the cell cycle, consisting of the
portion of interphase after DNA synthesis occurs.
,Growth and preparation for mitosis
Answer: G2 Phase
●● First and longest phase of mitosis, during which the chromosomes
become visible and the centrioles separate and take up positions on the
opposite sides of the nucleus
Answer: Prophase
●● Second phase of mitosis, during which the chromosomes line up
across the center of the cell
Answer: Metaphase
●● The third phase of mitosis, during which the chromosome pairs
separate and move toward opposite poles
Answer: Anaphase
●● The final phase of cell division, between anaphase and interphase, in
which the chromatids or chromosomes move to opposite ends of the cell
and two nuclei are formed.
Answer: Telophase
●● Division of the cytoplasm during cell division
Answer: Cytokinesis
, ●● Cell division that produces reproductive cells (gametes) in sexually
reproducing organisms
Answer: Meiosis
●● Compare and Contrast Mitosis and Meiosis
Answer: Mitosis produces two diploid (2n) somatic cells that are
genetically identical to each other and the original parent cell, whereas
meiosis produces four haploid (n) gametes that are genetically unique
from each other and the original parent (germ) cell.
●● Number of Chromosomes in Humans...
Answer: 46
●● Haploid Number of Chromosomes In Humans
Answer: 23
●● Control center of the cell; a part of the cell containing DNA and
RNA and responsible for growth and reproduction
Answer: Nucleus
●● Processes and transports proteins made at attached ribosomes;
synthesizes phospholipids
Answer: Rough Endoplasmic Reticulum (RER)
