Embedded Files
Important Biological Molecules.pdfImportant Biomolecules
Important Biomolecules
Presentation describing some of the molecules important for life. Click on the links within slides to find descriptions of some of the key vocabulary.
Prokaryotic vs Eukaryotic cells and cell organelles
Video with a clear and simple explanation about the differences between prokaryotic and eukaryotic cells
Amoeba sisters: video describing the modern cell theory and the difference between prokaryotic and eukaryotic cells.
Crash Course: Eukaryotic cells.
Cells alive website: Click on the interactive cell models. Shows examples of generalized plant, animal and bacteria cells. www.cellsalive.com/
Cytoplasmic Streaming
Cytoplasmic Streaming
Surface area to Volume ratio
Why are cells so small? Video
Why are cells so small? Video
Describes surface area to volume ratio and explains the importance to cells. Includes an example of the agar prac that we completed in class.
Surface Area to Volume Ratio
Surface Area to Volume Ratio
Video describing how to calculate surface area, volume and the surface area to volume ratio. Good explanation if you are finding the concept challenging.
Crossing the Plasma Membrane (cell membrane)
Crossing the Plasma Membrane.pdfCrossing the Plasma Membrane
Crossing the Plasma Membrane
PDF of presentation given in class.
Structure of the Plasma Membrane
Structure of the Plasma Membrane
The plasma membrane (or cell membrane) forms the boundary between the internal environment of the cell and the external environment. The structure of the membrane can be described by the fluid mosaic model.
Fluid: it is constantly flowing and changing shape + Mosaic: it has multiple components
Understanding the structure of the plasma membrane, helps us to understand how it can carry out its function - particularly how it controls the movement of particles into and out of a cell.
Phospholipid
Phospholipid
Main component of cell membranes, a phospholipid has a polar, hydrophilic 'head' and a non-polar, hydrophobic 'tail'
Crash Course: Membranes and Transport.
Amoeba sisters: crossing the plasma membrane. Includes information about the structure of cell membranes.
Amoeba sisters: Osmosis. Includes key terminology and introduces the concept of turgor pressure in plant cells. This concept will be addressed further in AOS2.
Active Transport vs Passive Transport. Compares and contrasts the types of movement across cell membranes.
Osmosis.pdfOsmosis
Osmosis
Presentation as shown in class. Defines key terms associated with osmosis and describes what happens at a cellular level.
Molecules on the move video.mp4Molecules on the move
Molecules on the move
Time-lapse video showing the results from a dialysis tubing practical activity, using a thistle funnel rather than an enclosed bag. Consider changes to the water level in the thistle funnel and colour differences within the dialysis tubing and in the gas jar. Which way did the molecules move?
Modelling the Plasma Membrane - Made with Clipchamp.mp4Modelling the Plasma Membrane
Modelling the Plasma Membrane
Time-lapse video showing the part-A section of the modelling the plasma membrane prac. The tube at the back is filled with starch, and the tube at the front is filled with tap water. Consider how the colours change within the dialysis tubing and in the beaker. How can this be used as evidence to support how the molecules moved?
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