Bushra Hanaif Professor Kristen Przyborski BI 121-02 April 14‚ 2013 1) In the 1940s‚ some physicians prescribed low doses of a drug called dinitrophenol (DNP) to help patients lose weight. This unsafe method was abandoned after a few patients died. DNP uncouples the chemiosmotic machinery by making the lipid bilayer of the inner mitochondrial membrane leaky to H+. Explain how this can cause weight loss. In a coupled reaction‚ an exergonic reaction provides the energy needed to drive an endergonic
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Biology Assessment #4 Australian Megafauna: Thylacoleo Carnifex & Diprotodon Optatum Part A: The term Megafauna means ‘big animals’‚ and refers to animals with a body mass of over 40 kilograms. In general use‚ the term Megafauna is used to refer to the animals that evolved after the dinosaurs became extinct 65 million years ago. The extinction of the dinosaurs meant that the large number of birds‚ mammals and reptiles‚ which were left over‚ were able to evolve and dominate the earth.
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Water molecules move from high to low Osmosis is what they seem to know Solute and Solvent are what’s inside The polarity of water makes it easy to find “Hyper” and “Hypo” tells you how much is there But isotonic means that they are fair Water molecules move from the inside out Scientists call this plasmolysis without a doubt All of this happens inside a membrane It is a serious matter‚ not a fun little game When a membrane is selective it chooses what it wants Few things are moved through
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Introduction “Micro” refers to tiny‚ “scope” refers to view or look at. Microscope is the major tool of biologists‚ an optical instrument that uses lens or combination of lens to produce magnified images that are too small to seen by unaided eye. Microscope provides the enlarged view that helps in examining and analyzing the image. Through the use of microscope ‚ knowledge of cell structure was gained and one of the fundamental theories of biology‚ the Cell Theory was developed.
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Review Questions 3. Animals benefit from the relationship with plants because they are able to get rewards such as pollen and nectar. With these they have the ability to continue on with their daily work. Applying Your Knowledge 1. The rise in prominence of one major group does not necessarily result in the total replacement of a previously dominant group because one group may work better in the part than the other group. Gymnosperms for example produce excess amount of pollen‚ they are
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The following is excerpted from The Tabernacle‚ the Priesthood‚ the Offerings by I.M. (Isaac Massey) Haldeman‚ 1925. Haldeman was the pastor of First Baptist Church of New York City for nearly 50 years‚ from 1884-1933. Though Haldeman did not have advanced formal theological training‚ he made up for this with a high native intellect‚ excellent gifts‚ a passion for Jesus Christ‚ a love for God’s Word‚ diligent study habits‚ and a broad appetite for learning under the Headship of Christ. In recognition
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Experiment 9/5 Voltaic cells AIM How the change the concentration of the electrolyte CuSo4 (solution of ions) affect the voltage of the electrochemical cell BACKGROUND An electrochemical cell is also called a voltaic cell‚ which derives electrical energy from redox reaction taking place within the cell. It consists of two different metals that are connected by a salt bridge. Eletrons always flow from anode to cathode‚ where anode is negative (reduction) and cathode is positive (oxidation)
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REVISION COMMON TYPES OF MICROBES 1 BACTERIA Difference between Gram Positive and Gram Negative Shapes of bacteria and examples What shapes have you learnt? GRAM STAIN: The process! You should work on your lab notes. LECTURE 2 GRAM STAIN Developed by a Danish called Christian Gram in 1884 Stain a heat-fixed smear with a dye like crystal violet and fix with Iodine Then wash with ethanol or acetone Finally counterstain with a dye of different colour such as safranin (what is its colour
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Natural selection _________. a. results in evolutionary adaptation b. is the result of sampling error c. does not affect allelic frequencies d. prepares organisms for future changes in the environment e. causes changes in the genes of the individual Biologically speaking‚ fitness increases when an organism _______________. a. survives many hardships b. lives for a long time c. passes on a greater proportion of its genes to the next generation d. is disease free e. gets stronger The evolutionary history
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Biology‚ 7e (Campbell) Chapter 19: Eukaryotic Genomes: Organization‚ Regulation‚ and Evolution Chapter Questions Under the electron microscope‚ unfolded chromatin resembles "beads on a string." What do the "beads" represent? A) nucleosomes B) ribosomes C) beadosomes D) molecules of DNA polymerase E) molecules of RNA polymerase Answer: A Topic: Concept 19.1 Skill: Knowledge In a nucleosome‚ what is the DNA wrapped around? A) polymerase molecules B) ribosomes C) mRNA D) histones
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