EXAM|COMPLETE QUESTIONS WITH EXPERT SOLUTIONS| 2026
LATEST UPDATED| A+
The Normal Cell Cycle - (answer)-The cell cycle refers to the ordered seres of processes of DNA
replication and mitosis, or cell division
-Cell nucleus regulates these processes by gathering and processing complexes molecular
information
Interphase and Mitotic Phase - (answer)Cell division produces two identical cells through these
two major phases
During interphase: - (answer)Cell grows and DNA is replicated through the following three
steps:
1: First growth phase (G1 or first gap)
2: Synthesis phase (S phase)
,3:Mitotic Phse (M phase)
First Growth Phase (G1 or first gap) - (answer)-cells increase in size
-reproduce RNA
-"quality assurance" test that the cell will be ready to synthesis DNA
-Length of time is variable, can be from hours to days
Synthesis Phase (S phase) - (answer)-DNA replicates
-Results in the formation of identical pairs of DNA (chromatids)
-which are attached a t the centromere
-lasts 2-10 hours
,Mitotic Phase (M phase) - (answer)-Replicated chromosomes are aligned, separated, and move
into 2 new, identical daughter cells
-takes about 30-60 minutes
Major points of cell regulation are entry and exit from - (answer)-G1 checkpoint
-S Phase
-G2 checkpoint
-M phase
Restriction Point - (answer)-The transition from the resting phase into an actively dividing phase
(G0-G1) is a point where cellular transformation can occur
-During this time, cells pass through a transition phase known as a restriction point
, -Extracellular growth factors trigger reentry into G1, and GF are required to send the cells past
the restriction point, or the point of no return
G0 Phase (resting phase) - (answer)-After mitosis, cells may enter back into the G1 phase or go
into a resting phase, known as G0
-Most cells in the human body reside in G0
-Exceptions to this are those that are (Resting in G0 phase) - (answer)-Exceptions to this are
those that are metabollically active, such as
-granulocytes
-and the epithelium of the GI tract
Cell Cycling Time - (answer)Amount of time from mitosis to mitosis