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

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3.3 Structure of an
epithelial cell…read more

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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

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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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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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