biology - structure & function of cells

8/8/2019 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 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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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

biology - structure & function of cells

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