article‚ we discuss how cells‚ organs‚ and organisms normally control growth‚ and how deregulated growth can lead to a variety of pathological conditions. Introductory article Article Contents . Introduction . Increasing Cell Mass by Building New Protein . Human Diseases of Cell Growth . Coordinating Cell Growth and Cell Division . Organ and Organism Growth in Humans . Hypertrophy versus Hyperplasia . How is Organ Size and Body Size Coordinated? Introduction Controlling growth in cells organs
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Biology 4U Exam Review Intro to Biochemistry Types of bonding: Ionic Results from the attraction between two oppositely charged atoms or molecules. They must lose or gain electrons to become charged. For example‚ a sodium molecule and a chlorine molecule form an ionic bond to create sodium chloride (NaCl) Covalent Results from the sharing of one or more pairs of valence electrons to create a stable molecule. For example‚ the covalent bonding of hydrogen ions creates hydrogen gas (H2)
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The upper most strand is the (coding strand) DNA base sequence (triplet) of the gene codes for synthesis of a particular polypeptide chain. The second strand is the mRNA base sequence (template strand used for copying) codon of the transcribed mRNA. The process for going from the upper stand to the second strand is called Transcription and involves an enzyme called polymerase. The polymerase attaches to the promoter region (start codon) and reads the nucleotide base sequence until it gets to a termination
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Pg. 287 #1‚3‚4 1. Describe the structure of a nucleotide. A nucleotide is a sugar molecule that has 3 parts including a simple sugar‚ a phosphate group and a nitrogenous base. Nucleotides join together forming long chains‚ with the phosphate group of nucleotide bonding to the deoxyribose sugar of an adjacent nucleotide. 3. Explain why the structure of a DNA molecule is often described as a zipper. The structure of a DNA molecule is often described as a zipper because it is made of tow chains
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by a dehydration synthesis reaction between monosaccharides. What does this mean? Water molecules are removed from the bond. 6. For each of the following tests‚ please circle which substance would give a positive result: a. Benedict’s test - glucose tap water oil (lipid)) starch protein b. Starch test - glucose tap water oil (lipid)) starch protein c. Sudan IV test - glucose tap water oil (lipid)) starch protein d. Biuret
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Page No. Task 01 1.1How Archaea is similar to Eukaryotes and how they differ from Bacteria………..02 1.2: Importance of co-ordination between sub cellular organelles in Eukaryotic cell‚ using protein synthesis and transportation within cells…….…………………04 1.3 Explain the role of different types of transporters in cell membrane……………....07 Task 02 2.1 Explain how in each stage of Interphase‚ mitosis and controlling agents involved to contribute
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cells like plants and animals are. Also a virus does not have a cell membrane as many living cells do. They can’t grow on their own or undergo division. A virus is so small that they can only be seen with an electron microscope. They consist of a protein coat‚ which contains either DNA or RNA‚ and are not made up of cells. Therefore‚ a virus is not alive in the form of independent living. A virus can’t reproduce on its own. It requires a living host cell to reproduce because without it viruses act
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membrane bound organelles‚ or tiny cellular structures that carry out specific functions necessary for normal cellular operation. smaller than plant cells. Cell Membrane is the outermost component of a cell. it is composed of 55% proteins‚ 25% phospholipids‚ 13% cholesterol‚ 3% carbohydrates‚ and 4% other lipids. encloses the cytoplasm and forms the boundary between material inside and materials outside it. it is semi-permeable‚ which means it regulated the flow of materials such
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Human Physiology Exam 1 Part 2 Study Guide Chapter 1 Define homeostasis * Maintenance of constant conditions in the internal environment. Composition‚ temperature and volume of extracellular fluid do not change significantly under normal conditions Know the components of a homeostatic control mechanism * Regulated Variable- Regulated to stay within relatively narrow limits * Set Point- normal desire value * Error Signal- difference between the actual value and the set point
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MBB 110 2nd Part Energy Generation/Transport For eukaryotes‚ mitochondria generates energy. For prokaryotes‚ cell membrane performs energy synthesis Glycolysis ATP is needed Glucose Pyruvate Net production of 2 ATP Citric acid cycle Substrate level phosphorylation Electron Transport Chain Occurs in cell membrane Sequence involve repair organization Anaerobic respiration: NOT O2 Aerobic respiration: O2 final acceptor ATP is produced by the Proton Motive Force Chemiosmosis H+ accumulates
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