AQA UNIT 1: CHAPTER 3: CELLS AND MOVEMENT IN AND OUT OF THEM

Powerpoint presentation that uses the specification per slide, uses information from the textbook. I have got word document notes (in a more Q & A style) that go with it if your interested (just ask). Don't know how useful this is, but if it turns out to be, i've got a tonne more.

I tend to work visually so this is why it works well for me - helps to know what type of learner you are! 

Warning: designed to work with the textbook, not instead of.

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  • Created by: Marya
  • Created on: 03-01-12 16:08

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Slide 1

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3.1.3 Substances are exchanged between
organisms and their environment by passive or
active transport across exchange surfaces. The
structure of plasma membranes enables control
of the passage of substances across exchange
surfaces
Cells, Plasma Membranes, Diffusion,
Osmosis, Active Transport, Absorption…read more

Slide 2

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3.3 Structure of an
epithelial cell…read more

Slide 3

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Ultrastructure and
different types of cell.
O Ultrastructure is the internal structure of a
cell that makes it suit it's job.
O Eukaryotic cell have a distinct nucleus and
membrane bound organelles (Eg. Epithelial
cell)
O Prokaryotic cell, bacteria.
O Epithelial cells have to absorb and secrete.…read more

Slide 4

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The appearance, ultrastructure and function
of nucleus
O Function:
O To act as the control centre of the cell through mRNA production
O Synthesis Proteins
O Retain genetic material in the form of RNA
O Manufacture ribosomes and ribosomal RNA
O Ultrastructure:
O Nuclear Envelope ­ double membrane surrounding the nucleus.
· Outer is continuous with ER of cell
· Controls entry/exit of materials, and the reactions taking place
within it
O Nuclear Pores ­ allow passage of large molecules (RNA) out of nucleus
O Nucleoplasm ­granular jelly like material
O Chromatin ­ the form of DNA when it is not dividing, found in
nucleoplasm
O Nucleolus ­ spherical body in nucleoplasm
· Manufactures ribosomal RNA and ribosomes…read more

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Slide 6

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The appearance, ultrastructure and function
of mitochondrion
As the sites of respiration, it uses carbohydrates to provide the
production of ATP which is the energy carrier molecule.
The more active a cell is, the more mitochondrion it will have/require for
a plentiful supply of ATP
Function Structure
Double To control entry and exit Inner ­ cristae, outer - membrane
membrane of material
Cristae Provide large SA for Shelf-like extensions some of
enzyme attachment which span the width of the
(respiration) mitochondrion
Matrix Allow protein production Semi-rigid material containing
to be controlled proteins, lipids, and DNA trace as
well as the enzymes involved in
respiration to be found in matrix…read more

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