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CYTOLOGY
What is the Cell Theory?• Made of cells (smallest
unit of structure.
• All of the life functions (smallest unit of function).
• All cells come from pre-existing cells.
Why is it only a Theory?• What about the
first cell?•Mitochondria•Chloroplasts
•Virus
How do we classify cells?
Prokaryotic
Eukaryotic
No nucleus Single circular
chromosome Small No true
organelles Simple
Yes, has nucleus Many pairs of
individual chromosomes
Large Membrane bound
organelles Complex
What are the life functions?
GRRRNEST
• Growth
• Reproduction
• Respiration
• Respond to Stimuli
• Nutirition
• Excretion
• Synthesis
• Transport
How does a cell do these
functions?
CELL ORGANELLES
Organelles: mini “organs” inside a cell.
MAKING PROTEINS
How does a cell carry out life functions?
Who controls all cell functions?
What does DNA code to produce that actually carries out these functions?
Where is DNA located?
Is DNA large or small? Can it leave the nucleus?
NO!
RNA will help it and carry its message to…..
So the DNA tells the ribosome which protein to make.
In ALL cells!!!!!!!
Packaging Proteins
Proteins need to be packaged up.
Bent into their 3D structure.
Who does that?
Do you know where ribosomes are located? Attached to what?
Endoplasmic Reticulum will package and ship to cell.
Making Energy
Cytoplasm/Cytosol
• Water fluid
• Site of all life functions
How does a cell get energy?
Adenosine triphosphate:
Energy storage molecule
What is the ultimate source of energy for an ecosystem?
How does the energy get into an ecosystem?
Autotrophs
Photosynthesis
Which organelle is capable of doing photosynthesis?
CHLOROPLAST
• Only in photosynthetic cells
• Contains chlorophyll
Chloroplast
What molecule (specifically) does a chloroplast make?
GLUCOSE
Chemosynthesis: chemoautotroph
Do some Bacteria do photosynthesis?
Do Bacteria have chloroplast?
So how do they do photosynthesis then?
Once the glucose is created by the chloroplast, how does it move through the rest of the ecosystem?
Heterotrophic
Consumers
Once consumed, how do you get the energy out of the food?
RESPIRATION
Breaking down glucose for ATP
Which organelle is responsible for doing aerobic respiration?
Why are there so many layers in a mitochondria?
Increase Surface Area
Do Bacteria do respiration?
Do Bacteria have mitochondria?
So how do they do respiration then?
How are materials transported throughout a cell?
ER for within
How do molecules get into a cell?
• Transporting materials in and out.• In ALL cells!
• Only in Plants• Made of cellulose• Give plants their shape and
structure
BACTERIAL CELLS
PLANTS
ANIMALS
Fungal
Who am I?