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Lecture 1 (new)(done) - Welcome to Principles of Biology II...

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Welcome to Principles  of Biology II Lab  (BIO122)
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Learning Objectives To: Acquire knowledge pertaining to the many  characteristics of prokaryotes as well as  their classifications. Briefly explain the reproduction patterns of  prokaryotes  . Acquire knowledge regarding viruses in  terms of their characteristics and their  replication cycle
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Learning Outcomes Upon successful completion of the  programme, students will be able to: Explain the characteristics of prokaryotes in  terms of cell shape, motility, staining attributes,  nutritional requirements, metabolic patterns,  reproduction, gene transfers, reproduction as  well as classifications. Define viruses and explain the characteristics  of viruses as well as able to describe their  replication cycle
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Prokaryotes
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Prokaryotes  A recap into their origin…. Major biomass contributor on earth. Cell size is  µ m. Divided into two groups:  Bacteria  Archaeans
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Their Characteristics No membrane-bound nucleus and organelles Single chromosome (circular DNA) Cell wall in most species Reproduction via prokaryotic fission Vast metabolic diversity among species
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Common bacterial shapes
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Common bacterial shapes and its description Bacterial Shape                          Description                                         a.  Coccus  (plural cocci)                              Round shaped       (Greek word: berries)                                       Staphylococci- cluster of cells  Streptococci – cells in chain-like                             arrangement  b.   Bacillus  (plural bacilli)                              Rod shaped   c. Spirillum   (sprilla)                                     Corkscrew,                                                                        Comma                                                
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Bacterial structure STRUCTURE FUNCTION Cell Wall protects the cell and gives shape; made of a structure known as peptidoglycan Cell Membrane regulates movement of materials into and out of the cell;  contains enzymes  important to cellular respiration
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