CURRENT TRENDS/ISSUES
IN TEACHING
(BIOLOGY/CHEMISTRY/PHYSICS/SCIENCE, GS 312, BIO 604)
Prepared by:
MARIEJOY V. ADLAWAN
MAED – Biology 2
4 Pics 1 Word
CELL 
4 Pics 1 Word
ORGAN
Cell Organelles
© J Beauchemin 2006
OBJECTIVES
Identify the different organelles present in
both animal and plant cells.
Describe the structure and function of
major and subcellular organelles.
VIDEO PRESENTATION ABOUT CELLS
QUESTIONS
1. Name at least three cell organelles and its
functions from the video.
2. Why are cells so important?
3. What happen to the entire cell if one of its
organelles is destroyed?
CELLS
Cell was first discovered by Robert Hooke
in 1665.
All living things are made up of cells
Cells are the building blocks of all living
things
Carry out all chemical activities needed to
sustain life
The Difference between
Plant Cell and Animal Cell
Cell Organelles
Organelle= “little
organ”
All the stuff in
between the
organelles is cytosol
Everything in a cell
except the nucleus is
cytoplasm
Cell Membrane
Boundary of the cell
Made of a phospholipid bilayer with proteins
embedded (Fluid-Mosaic Model)
Nucleus
Control center of the
cell
Contains DNA
Surrounded by a
double membrane
Usually the easiest
organelle to see under
a microscope
Usually one per cell
Nuclear Membrane
Barrier of nucleus
Consists of a
double phospholipid
membrane
Contain nuclear
pores that allow for
exchange of
material with the
rest of the cell
Nucleoli
Nucleus contains
one or more
nucleoli
Sites of ribosome
production

Ribosomes then
migrate to the
cytoplasm through
nuclear pores
Chromatin
Composed of DNA
and protein
Scattered
throughout the
nucleus
Chromatin
condenses to form
chromosomes when
the cell divides
Cytoskeleton
Acts as skeleton and
muscle
Provides shape and
structure
Helps move
organelles around the
cell
Made of three types of
filaments
Endoplasmic
Reticulum
A.k.a. “E.R.”
Connected to nuclear
membrane
Highway of the cell –
used for transport
Rough ER: studded
with ribosomes; it
makes proteins
Smooth ER: no
ribosomes; it makes
lipids
Ribosome
Site of protein
synthesis
Found attached to
rough ER or floating
free in cytosol
Produced in a part of
the nucleus called the
nucleolus
That looks familiar…what is a
polypeptide?
Golgi Apparatus
Looks like a stack of
pancakes
Stores, modifies and
packages proteins
Molecules transported
to and from the Golgi
by means of vesicles
Lysosomes
Garbage disposal
of the cell
Contain digestive
enzymes
Can help break
down food,
waste, or old
organelles
Mitochondria
“Powerhouse” of the cell
Cellular respiration
occurs here to release
energy for the cell (ATP)
Bound by a double
membrane
Has its own strand of
DNA
Cristae (folds) increase
surface area
Chloroplast
Found only in plant
cells
Contains the green
pigment chlorophyll
Site of food (glucose)
production
Bound by a double
membrane
Has its own strand of
DNA
Cell Wall
Found in plant and
bacterial cells
Rigid, protective
barrier
Located outside of the
cell membrane
Made of cellulose and
lignin (fiber)
Vacuoles
Large central vacuole
usually in plant cells
Many smaller
vacuoles in animal
cells
Storage container for
water, food, enzymes,
wastes, pigments, etc.
Centriole
Aids in cell division
Usually found only in
animal cells
Made of microtubules
Quick Review
Which organelle is the control center of the cell?
Nucleus
Which organelle holds the cell together?
Cell membrane
Which organelles are not found in animal cells?
Cell wall, central vacuole, chloroplasts
Which organelle helps plant cells make food?
Chloroplasts
What does E.R. stand for?
Endoplasmic reticulum
ASSESSMENT
Let’s Play Kahoot!
Kahoot! is a game-based learning platform, used
as educational technology in schools and other
educational institutions. Its learning games,
"kahoots", are user-generated multiple-choice
quizzes that can be accessed via a web browser
or the Kahoot app.
THANK YOU !!!
REFERENCES:
https://medlineplus.gov/genetics/understanding/basics/cell/
https://www.britannica.com/science/cell-biology
https://kahoot.it/
https://youtu.be/URUJD5NEXC8