Bio 1A03 Test 3 Exam 2026 Questions and
Answers
Binary Fission steps - Correct answer--Initiated when proteins attach DNA to
plasma membrane
-Begins along ORI region
-Newly synthesized DNA also anchored to membrane
-Cell elongates until ~2 times its original size and two has two chromosomes on
opposite ends of the cell
-Cell splits in two
Quiescent stem cells, function - Correct answer-Permanently arrested in G0 phase.
In adults: can replace non-reproducing specialized cells) ex adult skeletal
muscle/myofiber)
Steps of quiescent stem cell to myofiber - Correct answer--Activated (reenter cell
cycle)
-Proliferative (look over this one)
©COPYRIGHT 2025, ALL RIGHTS RESERVE 1
,-Commitment to differentiation
-Fusion into myotube (precursor of myofiber)
-Myofiber
steps of cell cycle - Correct answer-G1 phase
S phase
G2 phase
M phase
~G0 phase~ perhaps
G1 phase - Correct answer-growth phase, prepares cell for dna synthesis
s phase - Correct answer-cell undergoes dna replication
g2 phase - Correct answer-growth phase, cell prepares for division
M phase - Correct answer-mitosis and cytokinesis
cells in permanent g0 phase - Correct answer-eye lens, nerve, mature muscle cells
binary fission is common to - Correct answer-bacteria, archaea, mitochondria,
chloroplasts
©COPYRIGHT 2025, ALL RIGHTS RESERVE 2
, Satellite Stem Cells - Correct answer-quiescent stem cells that specifically are
activated to replace injured muscle fibers
Walter Flemming - Correct answer-Discovered stages of mitosis from salamanders
During interphase, the genetic material of a typical eukaryotic cell is - Correct
answer-chromatin fiber
genetic material during s phase - Correct answer-sister chromatids are synthesized
(including centromere) but chromosomes don't actually compact until M phase (46
X-shaped not linear chromosomes / 92 chromatids)
chromatids - Correct answer-chromosome in duplicated state
# chromosomes and chromatids in human before & after mitosis, meiosis I, and
meiosis II - Correct answer-Mitosis
Before: 46, 92
After: 46, 46
Meiosis I
Before: 46, 92,
After: 23, 46
©COPYRIGHT 2025, ALL RIGHTS RESERVE 3
Answers
Binary Fission steps - Correct answer--Initiated when proteins attach DNA to
plasma membrane
-Begins along ORI region
-Newly synthesized DNA also anchored to membrane
-Cell elongates until ~2 times its original size and two has two chromosomes on
opposite ends of the cell
-Cell splits in two
Quiescent stem cells, function - Correct answer-Permanently arrested in G0 phase.
In adults: can replace non-reproducing specialized cells) ex adult skeletal
muscle/myofiber)
Steps of quiescent stem cell to myofiber - Correct answer--Activated (reenter cell
cycle)
-Proliferative (look over this one)
©COPYRIGHT 2025, ALL RIGHTS RESERVE 1
,-Commitment to differentiation
-Fusion into myotube (precursor of myofiber)
-Myofiber
steps of cell cycle - Correct answer-G1 phase
S phase
G2 phase
M phase
~G0 phase~ perhaps
G1 phase - Correct answer-growth phase, prepares cell for dna synthesis
s phase - Correct answer-cell undergoes dna replication
g2 phase - Correct answer-growth phase, cell prepares for division
M phase - Correct answer-mitosis and cytokinesis
cells in permanent g0 phase - Correct answer-eye lens, nerve, mature muscle cells
binary fission is common to - Correct answer-bacteria, archaea, mitochondria,
chloroplasts
©COPYRIGHT 2025, ALL RIGHTS RESERVE 2
, Satellite Stem Cells - Correct answer-quiescent stem cells that specifically are
activated to replace injured muscle fibers
Walter Flemming - Correct answer-Discovered stages of mitosis from salamanders
During interphase, the genetic material of a typical eukaryotic cell is - Correct
answer-chromatin fiber
genetic material during s phase - Correct answer-sister chromatids are synthesized
(including centromere) but chromosomes don't actually compact until M phase (46
X-shaped not linear chromosomes / 92 chromatids)
chromatids - Correct answer-chromosome in duplicated state
# chromosomes and chromatids in human before & after mitosis, meiosis I, and
meiosis II - Correct answer-Mitosis
Before: 46, 92
After: 46, 46
Meiosis I
Before: 46, 92,
After: 23, 46
©COPYRIGHT 2025, ALL RIGHTS RESERVE 3
