Aim: How can we apply our
knowledge of cells and biochemistry?
Test tomorrow
HW due tomorrow
A Cell’s Life Cycle
Figure 3–23 The Cell Life Cycle.
Centrosome:Centrosome:
Centrioles Centrioles
PericentriolarPericentriolar
material
material
11
6
LM
Nucleolus Nucleolus
Nuclear envelope
Nuclear envelope
Chromatin Chromatin
Plasma membrane
Plasma membrane
Cytosol
Cytosol
all atLM
700x
all at 700x
(a) INTERPHASE
(a) INTERPHASE
2
2
Kinetochore
Kinetochore
Mitotic spindle
(microtubules)
Mitotic spindle
(microtubules)
Fragments of
nuclear envelope
Fragments of
nuclear envelope
Centromere
Centromere
Chromosome
Chromosome
(two chromatids
(two chromatids
joined atjoined at
centromere
centromere
Early
(f) IDENTICAL CELLS IN INTERPHASE
5
5
(b) PROPHASE
(b) PROPHASE Late
Late
Metaphase
Metaphaseplate
plate
3
Cleavage furrow
Cleavage furrow
3
(c) METAPHASE
(c) METAPHASE
4
(e) TELOPHASE
4
(e) TELOPHASE
Cleavage
furrow
Cleavage
furrow
Chromosome
Late
Early
Late
(d)
(d)ANAPHASE
ANAPHASE
Chromosome
Early
Station 1- Organelles
• Identify the organelles identified by their
definitions
Station 2- The Plasmalemmma
D
C
S
B
A
Station 3A- Tonicity
A
B
C
Station 3B- Tonicity
Station 3C- Tonicity
• What would happen to an animal cell in each of the following
solutions?
1. Hypertonic: The cell would
____________________________ because the water
molecules would _____________________.
2. Hypotonic: The cell would
_______________________________ because the
water molecules would ______________________.
3. Isotonic: The cell would
________________________________ because the
water molecules would ______________________.
Station 4- The Cell Cycle
1. Label the picture with each phase of mitosis.
2. Write a description of each phase of mitosis.
3. Identify the part of the cell cycle being
discussed.
a.
b.
c.
d.
DNA is replicated.
The genetic material divides.
Cell Growth and organelle duplication.
Non-dividing period of the cell cycle , when cell is
preparing to divide.
A
Station 5- Transport across the
membrane
B
D
Extracellular
fluid
Cytosol
C
A
B
C
Station 4 Biochemistry
Part 1- Identify the molecules shown on worksheet 1.
Part 2- Identify the organic Molecule.
a. Can form peptide bonds.
b. Formed from covalently binding monosaccharides.
c. This is the most abundant lipid in the body.
d. The order of amino acid determines the primary sequence
of this molecule.
e. This is the body’s main source of energy.
f. This chemical is needed to produce sex hormones and the
cell membrane.
g. This organic molecule is made up of nucleotides.