September 7 2010

September 7 2010 - B io Lectu re T uesday 9/7/2010 Labs...

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Bio Lecture – Tuesday 9/7/2010 Labs start 9/13 – quiz every lab. -Read over chapter one cause she doesn’t lecture on it. She starts with chapter 4. Chapter 4 – Cellular Level – LOOK AT THE SLIDES ON SAKAI. PRINT AND LEARN. Scientific Theories - A theory is an overarching explanation for a wide range of facts. A lot of facts go into a theory. Cell Theory - How does it relate to evolution? - Is a virus cellular? Is it alive? – No. Viruses do not have the same structure as cells. They may have some of the attributes but not all. 1. Cells are basic units of organization and function in all living organisms. 2. All cells come from preexisting cells. 3. All living cells have evolved from a common ancestor. Metabolism sum total of all the activities that go on in the organism. 1. Anabolism - synthesizing 2. Catabolism – breaking down BOTH ARE EQUALLY I MPORTANT BECAUSE THE CELL REQUIRES BOTH Water Hydrophobic or Hydrophilic o Cells are both hydrophobic and hydrophilic: homeostatsis. o Help give cells their structures. Different structures are hydrophobic or -philic, but a cell is both. Minerals – WHY ARE IONS IMPORTANT? - Anions (-) / Cations ( +)
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- The charge provides a basis for interaction. Biological Molecules o Carbohydrates – hydrophilic o Lipids – more hydrophobic, but has its hydrophilic regions o Proteins – some hydrophobic some hydrophilic Almost all enzymes are proteins. Almost all reactions that occur in the cell are due to the enzymes. o Nucleic Acids – DNA / RNA LIFE – builds / renews / and expands itself. CELLS CAN…. . Selective Separation – for cells it is BAD to be ONE with the environment. They need to separate themselves. Energy Transformations – cells receive all kinds of energy usually in the form that is not immediately usable. Mechanisms allow these energies to be transformed into energy that is more usable. (venus fly trap) Information Storage and Retrieval Systems – flow of information. DNA -> RNA -> Protein Ex: Hemoglobin – transfers oxygen throughout the body. *Think of proteins as enzymes because they speed up functions – metabolism. Reproduction – Asexual / Sexual. Unity / Diversity. Unity: initially the same for function of sustaining life. Diversity: not all the same. Different organelles / different function. EVOLUTION – what makes biology make sense. Without it, its just unrelated facts. PLASMA MEMBRANE
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All cells from the simplest to the complex provide the separation from the environment . ALL CELLS HAVE PLASMA MEMBRANES Some cells have cell walls. Made of cellulose and other polysaccharides. Bacteria, fungi, and plant cells. Cells walls are usually outside the plasma membrane. Everything that enters / leaves the cell must pass through the plasma
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This note was uploaded on 04/08/2011 for the course BIOLOGY 109:102 taught by Professor Martin during the Spring '11 term at Rutgers.

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September 7 2010 - B io Lectu re T uesday 9/7/2010 Labs...

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