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CHAPTER 3 EXAM: BIOS 251, 2025/2026 WITH CORRECT/ACCURATE ANSWERS
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CHAPTER 3 EXAM: BIOS 251, 2025/2026 WITH CORRECT/ACCURATE ANSWERS
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CHAPTER 3 EXAM: BIOS 251,2025/2026 WITH
CORRECT/ACCURATE ANSWERS
cells - CORRECT ANSWERS- are the basic, living, structural, and
functional units of the body
Interphase - CORRECT ANSWERS- Period between cell divisions;
chromosomes not visible under light microscope.
G1 phase - CORRECT ANSWERS- Metabolically active cell
duplicates most of its organelles and cytosolic components;
replication of chromosomes begins. (Cells that remain in the G1
phase for a very long time, and possibly never divide again, are
said to be in the G0 phase.)
S phase - CORRECT ANSWERS- Replication of DNA and
centrosomes.
G2 phase - CORRECT ANSWERS- Cell growth, enzyme and protein
synthesis continue; replication of centrosomes complete.
Mitotic phase - CORRECT ANSWERS- Parent cell produces
identical cells with identical chromosomes; chromosomes visible
under light microscope.
, Mitosis - CORRECT ANSWERS- Nuclear division; distribution of two
sets of chromosomes into separate nuclei.
Prophase - CORRECT ANSWERS- Chromatin fibers condense into
paired chromatids; nucleolus and nuclear envelope disappear;
each centrosome moves to an opposite pole of the cell.
Metaphase - CORRECT ANSWERS- Centromeres of chromatid
pairs line up at metaphase plate.
Anaphase - CORRECT ANSWERS- Centromeres split; identical sets
of chromosomes move to opposite poles of cell.
Telophase - CORRECT ANSWERS- Nuclear envelopes and nucleoli
reappear; chromosomes resume chromatin form; mitotic spindle
disappears.
Cytokinesis - CORRECT ANSWERS- Cytoplasmic division;
contractile ring forms cleavage furrow around center of cell,
dividing cytoplasm into separate and equal portions.
haploid - CORRECT ANSWERS- 23 chromosomes
diploid - CORRECT ANSWERS- 46 chromosomes
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