BIOS 251 EXAM 2
1. Mitosis
Answer Cell division in which the nucleus divides into nuclei containing the same number of chromosomes
2. Interphase
Answer The resting phase of mitosis. Cell grows, performs its normal functions, and prepares for division;
consists of G1, S, and G2 phases
3. G0 Phase
Answer Cells that have left the cycle and cease dividing for a long time or permanently
4. G1 Phase
Answer The first gap, or growth phase, of the cell cycle, consisting of the portion of interphase before DNA
synthesis begins
5. S Phase
Answer The synthesis phase of the cell cycle; the portion of interphase during which DNA is replicated
6. G2 Phase
1/
25
,Answer The second gap, or growth phase, of the cell cycle, consisting of the portion of interphase after DNA
synthesis occurs.
7. Prophase
Answer 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
8. Metaphase
Answer Second phase of mitosis, during which the chromosomes line up across the center of the cell
9. Anaphase
Answer The third phase of mitosis, during which the chromosome pairs separate and move toward opposite poles
10. Telophase
Answer 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
11. Cytokinesis
Answer Division of the cytoplasm during cell division
12. Meiosis
2/
25
, Answer Cell division that produces reproductive cells (gamates) in sexually reproducing organisms
13. Differentiate between Mitosis and Meiosis
Answer Mitosis produces TWO DIPLOID (2n) somatic cells that are genetically identical to each other and
the original parent cell
Meiosis produces FOUR HAPLOID (n) gamates that are genetically unique from each other and the original parent
(germ) cell
14. 46
Answer Number of chromosomes in humans?
15. 23
Answer Haploid number of chromosomes in humans?
16. Nucleus
Answer Control center of the cell; a part of the cell containing DNA and RNA and responsible for growth and
reproduction
17. Rough Endoplasmic Reticulum (Rough ER)
Answer Processes and transports proteins made at at- tached ribosomes; synthesize phospholipids
3/
25
1. Mitosis
Answer Cell division in which the nucleus divides into nuclei containing the same number of chromosomes
2. Interphase
Answer The resting phase of mitosis. Cell grows, performs its normal functions, and prepares for division;
consists of G1, S, and G2 phases
3. G0 Phase
Answer Cells that have left the cycle and cease dividing for a long time or permanently
4. G1 Phase
Answer The first gap, or growth phase, of the cell cycle, consisting of the portion of interphase before DNA
synthesis begins
5. S Phase
Answer The synthesis phase of the cell cycle; the portion of interphase during which DNA is replicated
6. G2 Phase
1/
25
,Answer The second gap, or growth phase, of the cell cycle, consisting of the portion of interphase after DNA
synthesis occurs.
7. Prophase
Answer 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
8. Metaphase
Answer Second phase of mitosis, during which the chromosomes line up across the center of the cell
9. Anaphase
Answer The third phase of mitosis, during which the chromosome pairs separate and move toward opposite poles
10. Telophase
Answer 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
11. Cytokinesis
Answer Division of the cytoplasm during cell division
12. Meiosis
2/
25
, Answer Cell division that produces reproductive cells (gamates) in sexually reproducing organisms
13. Differentiate between Mitosis and Meiosis
Answer Mitosis produces TWO DIPLOID (2n) somatic cells that are genetically identical to each other and
the original parent cell
Meiosis produces FOUR HAPLOID (n) gamates that are genetically unique from each other and the original parent
(germ) cell
14. 46
Answer Number of chromosomes in humans?
15. 23
Answer Haploid number of chromosomes in humans?
16. Nucleus
Answer Control center of the cell; a part of the cell containing DNA and RNA and responsible for growth and
reproduction
17. Rough Endoplasmic Reticulum (Rough ER)
Answer Processes and transports proteins made at at- tached ribosomes; synthesize phospholipids
3/
25
