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Biology

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Reactions and Enzymes

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Thermodynamics
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Endergonic
Exergonic reaction
Exergonic
Energy
Entropy

Endergonic and exergonic | Back to Top Energy releasing processes, ones that "generate" energy, are termed exergonic reactions. Reactions that require energy to initiate the reaction are known as endergonic reactions. All natural processes tend to proceed in such a direction that the disorder or randomness of the universe increases (the second law of thermodynamics). Time-energy graphs of an exergonic reaction (top) and endergonic reaction (bottom). Images from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com), used with permission. Oxidation/Reduction | Back to Top

Physiology in the News

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Monica Luong Mrs. Taylor Physiology August 23, 2010 Oscar Undergoes First Full Face Transplant Recently Oscar, a 31 year old Spanish man, underwent the first full face transplant. He was operated on in late March in the Vall d?Hebron hospital in Barcelona. He went through a 24 hour sugery where doctors lifted his entire face and placed a jaw, nose, cheekbones, muscles, teeth, and eyelids into the man. Oscar went through surgery because he had accidentally shot himself in the face 5 years ago on his farm. It was very difficult for him to breathe or eat without assistance.

Biology chapter 1

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Meiosis
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Interphase takes the longest to complete. This is because the cell is recovering from cell division in this stage. Cytokinesis is most significantly different between plant and animal cells. They are different because unlike plant cells, in animal cells, a cleavage furrow is formed. The purpose of mitosis is to increase the number of cells that have the same set of DNA ans parent cells. When they split they produce identical cells with a complete set of DNA. Conclusion:

Eight Themes of Biology (trite study guide)

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1. Which of the following properties do we associate with living things? a. evolutionary processes b.energy processing c.responding to the environment d.growth and reproduction 2.Which of the following is not a theme that unifies biology? a.interaction with the environment b.emergent properties c.evolution d.reductionism e.structure and function 3. A localized group of organisms that belong to the same species is called a a.biosystem b.community c.population d.ecosystem e.family 4.For most ecosystems ____ is(are) the ultimate source of energy, and energy leaves the ecosystem in the form of ___. a.sunlight;heat b.heat;light c.plants;animals d.plants;heat e.producers;consumers 5.A type of protein critical to all cells is organic catalysts called

Midterm 1 Practice

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? ? ? 2. The amino acid glycine has the following structure: ? Which of the following is true about this amino acid: It does not have either L- or D- forms It only has an L- form It only has a D- form It cannot function as a buffer When found in a polypeptide chain this would be a very polar residue Which of the following is true about atoms? The electronegativity increases with the mass number. The electronegativity increases with the atomic number. Different isotopes have different chemical reactivities. Chemical reactivity is primarily determined by the electron configuration. All of the above are true. The most abundant form of RNA in a cell is: Messenger RNA (mRNA) Ribosomal RNA (rRNA) Transfer RNA (tRNA) Nucleolar RNA (nRNA) Mitochondrial RNA (mitoRNA)

Lab Report on Animal Behavior

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Lab Eleven: Animal Behavior Introduction a.) Ethology is the study of animal behavior. This includes observing the animal behavior's of an organism, interpreting if they are innate or learned, and you find information on these organisms. An animal?s behavior is its response to sensory input. There are three types of behaviors: orientation, agonistic, and mating. Agonistis behavior is shown when animals respond to each other by aggressive or submissive responses, it makes them look threatening. Mating behaviors are activities that involve finding, courting, and mating with a member of the same species.

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