IBDP> CORE> TOPIC 1> 1.2 ULTRASTRUCTURE OF CELLS
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UNDERSTANDINGSPROKARYOTIC CELLS
Draw and label a diagram of the ultrastructure of Escherichia coli (E. coli ) as an example of a prokaryote. Annotate the diagram of prokaryotic cell with the functions of each named structure. Identify structures in electron micrographs of E. coli. State that prokaryotic cells divide by binary fission. EUKARYOTIC CELLS Draw and label a diagram of the ultrastructure of a liver cell as an example of ananimal cell. Annotate the diagram with the functions of each named structure. Identify structures from in electron micrographs of liver cells. Compare prokaryotic and eukaryotic cells. |
ACTIVITY: Comparing Light micrograph and Electron micrograph
Prepare a temporary slide of plant leaf cell. Click pictures and complete the document uploaded on managebac.
SKILL: Microscopy skills- Use of light microscope to investigate the structure of plant and animal cell. (PSOW-2)
Prokaryote cell structure
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Prokaryotes have a simple structure. There are no compartments inside the cell structure.
A Prokaryotic cell has
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SKILL: Drawing a prokaryote cellRedraw the given diagram, label the parts and annotate it with
The functions of each of the structures in the prokaryotic cell.
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SKILL: Identifying the structure in electron micrograph of prokaryotic cell
APPLICATION: Division in prokaryotic cell
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Introduction to Eukaryotic cells
SKILL: Draw and label a diagram of the ultrastructure of a liver cell as an example of an animal cell.
Draw the given figure in the sheet provided
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Eukaryotic cells have compartments inside. Each of this may be bound by a single membrane or a double membrane.
Features of a eukaryotic cell-
While drawing see that-
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Annotating the diagram with the functions of each named structure.
Organelle is a distinct structure within a cell. Some are enclosed in their own membrane.
Ribosomes- protein synthesis
Golgi apparatus- processing/packaging of proteins/modifying proteins;
Lysosomes- digestion/destruction of worn out organelles/foreign bodies/cell suicide;
Mitochondrion- production of energy/ATP / aerobic respiration;
Rough endoplasmic reticulum: synthesis of proteins;
Nucleus: controls cell activities/mitosis/replication of DNA/transcription of DNA (to RNA)/directs protein synthesis;
Ribosomes- protein synthesis
Golgi apparatus- processing/packaging of proteins/modifying proteins;
Lysosomes- digestion/destruction of worn out organelles/foreign bodies/cell suicide;
Mitochondrion- production of energy/ATP / aerobic respiration;
Rough endoplasmic reticulum: synthesis of proteins;
Nucleus: controls cell activities/mitosis/replication of DNA/transcription of DNA (to RNA)/directs protein synthesis;
Watch the videos
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SKILL: Class stencil- identification of organelles from micrographs
Compare prokaryotic and eukaryotic cells.
APPLICATION: STRUCTURE AND FUNCTION OF ORGANELLES WITHIN EXOCRINE GLAND CELLS OF PANCREAS AND WITHIN PALISADE CELL OF LEAF
Exocrine cell of pancreas:
Secretes enzymes, that are proteins. Thus will have organelles to synthesise and secrete it in large amounts. List the organelles that will be required for this. Palisade cell: The main function of this cell is photosynthesis. List the organelles that are seen in the cell |
References-
Damon, Alan et al, Higher level Biology for the IB diploma. Pearson Baccalaureate
Clegg, CJ, Biology for the IB diploma. London: Hodder Murrray, 2007, 978-0340926529
Taylor, Stephan, Science Video resources Wordpress,
Burell, John. Click 4Biology(online)
All picture have been downloaded from Google images for educational purpose only
Damon, Alan et al, Higher level Biology for the IB diploma. Pearson Baccalaureate
Clegg, CJ, Biology for the IB diploma. London: Hodder Murrray, 2007, 978-0340926529
Taylor, Stephan, Science Video resources Wordpress,
Burell, John. Click 4Biology(online)
All picture have been downloaded from Google images for educational purpose only