Biology - Structure & Function of Cells
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Transcript of Biology - Structure & Function of Cells
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Generative Topic: Starting smallmake itBIG!
Molecules
CellsTissuesOrgans
Systems
Organisms
Elements
Macromolecules
Atoms
Cell
Organelles
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Cells under the Microscope
http://www.brynmawr.edu/biology/franklin/genome_intro.html
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Cell WallCell surfacemembrane
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1.2 How did the first cells look
like? Robert Hooke
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Cell Resume
Imagine that you are Mr/Ms _________.
You are trying to apply for a job at the
R&D centre Biopolis. You need to create a resume about
yourself.
Submission of the application, by 5pm.
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The Cell Story NAS Style
Choose an ICT expert from your group.
Take as many pictures of the process your
group undergo while creating your own NASian
Cell. You can make use of your camera phones!
Your pictures can be from various angles.
After you have gathered all the pictures, using
eitherWindows Photo Story 3, WindowsMovie MakerorMS Powerpoint piece your
pictures into a meaningful story of the Cell.
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The Cell Story NAS Style
The story should include introducing the
parts of the cell.
Your groups reasons in choosing theitems to represent the parts of the cell.
You can create your own flashcards and
take pictures of it.
Upload your photo story into the Grou.ps
site.
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The Cell Story NAS Style
Deadline for submission: 27 Sep 2010
Marks allocated for the group project:
15 marks More details about the submission will be
made available in Grou.ps by Thursday.
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Diagram of a typical animal cell
Cell membrane
Cytoplasm
Nucleus
Vacuole
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Diagram of a typical plant cell
Cell wall
Cell membrane
Nucleus
Cytoplasm
Tonoplast
Large centralvacuole
Chloroplast
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Differences
Animal & Plant cellPlant cell Animal cellCell wall Present Absent
Chloroplast Present Absent
Shape Regular Irregular
VacuoleNo. : One / FewSize: Big
Location: central
NumerousSmall
everywhere
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controls cell activities
Chloroplasts (in plant cells)
Cell surface membrane
CELL
consists of
whichwhichwhich
Nucleus Cytoplasm
and contains
Chromosomes
(made up of DNA)
is the selectively permeable,
outer covering enclosing the
cytoplasm
Mitochondria
surrounds the nucleus and is where
most cell activities occur
contains organelles
Vacuoles
Ribosomes
Centrioles (in animal cells)
Golgi apparatus
Endoplasmic reticulum
Quick Review
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Plasma membrane &Cytoplasm
Cytoplasm is a substance which is colourless
jelly-like / glue-like
Water containing It is surrounded by the plasma membrane
which is selectively permeable.
Organelles embedded within:
Nucleus Ribosomes
Mitrochondria
A typical Cell
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Nucleus A place which keeps all the
important documents - housedthe genetic material called DNA
Contain instructions to makeproteins.
Instructions can becommunicated to cytoplasmthrough chemical messengers(e.g. letters / email / photocopydocuments)
A typical Cell
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Ribosomes Makes proteins from
amino acids
20 different types of aminoacids in human
Different arrangements or
amino acids give rise to
different proteins
A typical Cell
Different amino acids
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Mitochondria Gives off energy by
Breakdown of sugars
from the food we eatto give
Energy + CO2 +water
A process calledrespiration
A typical Cell
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Vacuoles
A storage area where things are kept temporarily.
May contain solution of dissolved
amino acids
Sugars Water
Guarded by plasma membrane
A typical Cell
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Lysosomes Contains substances called
digestive enzymes to
breakdown old parts of celle.g. ribosomes
Recycle products e.g. chop up the proteins back into
amino acids
Chop up the carbohydrates intosugars
A typical Cell
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Cell Wall
-Made of cellulose (a carbohydrate)
-Is strong / tough :-give cell its shape
-Plants remains upright
-Totally permeable
A typical Cell
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Chloroplasts
Converts
-Energy from the sun
-Carbon dioxide-Water
Into Food - SugarsPhotosynthesis
A typical Cell
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-Walls
-Air / wind
-Teacher
-Students
-E
lectrical switches
-Shelves
Think about this
Is the Classroom a typical cell?
A typical Cell
Plasma Membrane
Cytoplasm
Nucleus
Ribosomes
Mitochondria
Vacuole
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Lets take a look