fundamental life functions‚ although certain ones may be specialized for participation in reproductive processes. In the most advanced plants‚ cells are associated in functionally specialized tissues‚ and associated tissues make up organs such as the leaves‚ stem‚ and root. Practically‚ every cell in the tissue of higher plants is a tiny‚ many-sided compartment enclosed by a water-impregnated wall otherwise composed principally of cellulose and other compounds closely related to carbohydrates. Plant
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in cell membranes and also as an energy reserve. They produce translucent spots on paper. In addition they dissolve a non-polar Sudan III /IV dye‚ and produce cloudiness with alcohol. • Proteins have a vital role in the growth and repair of tissues; also they have a role to play in cellular metabolism since most enzymes are proteins. The presence of two or more peptide bonds gives a violet color with Biuret’s reagent (NaOH
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(4) uses of energy in biological processes (B); active transport; muscle contraction; nerve transmission; synthesis; translocation; nitrogen fixation; receptors ENERGY TRANSFERS WHICH TAKE PLACE INSIDE LIVING ORGANISMS Living organisms including all plants and animals require energy for their cellular processes. In biological processes‚ the immediate energy source is often in the form adenosine triphosphate (ATP). The nucleotide ATP maintains both catabolic and anabolic reactions. An example of
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should be consumed in large amounts to sustain a healthy lifestyle. Macronutrients consist of the following: carbohydrates‚ lipids‚ and protein. In Chapters 4‚ 5‚ and 6 the macronutrients affect our energy in metabolism and help maintain our cells and tissues healthy. The first macronutrient I learned about was carbohydrates. Carbohydrates are made up of carbon‚ hydrogen‚ and oxygen. Carbohydrates are come from plants and provide our bodies with good energy. Carbohydrates are the preferred energy source
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Exploration Research Question What is the effect of different concentrations of sucrose in a solution on the mass and surface area of a beetroot (Beta Vulgaris) piece? Background The membrane consists of a phospholipid bilayer which is semi permeable. Osmosis is the passive movement of water molecules from an area of high water potential to an area of low water potential across a semi-permeable membrane. It is easy for water molecules to pass through this membrane however solutes that are big in
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ingredient‚ research and record the following information: a. What it is (very brief description: 1-2 sentences) b. What it does (very brief description of its physiological role in the body: 1-2 sentences) Red Bull® Ingredients: carbonated water‚ sucrose‚ glucose‚ citric acid‚ taurine‚ sodium citrate‚ magnesium carbonate‚ caffeine‚ glucuronolactone‚ inositol‚ niacinamide‚ calcium pantothenate‚ pyridoxine HCl‚ vitamin B12‚ natural and artificial flavors‚ colors. Carbonated water What it is: Carbonated
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Aim In this assignment I am going to carry out a practical examination on a plant (onion) and an animal (cheek) cell under a light microscope. The stain methods I am going to use are iodine for my onion cell and methylene blue for my cheek cell. Introduction All animals and plants are made up of cells. Animal and plant cells are made from millions of tiny cells‚ so small that we are unable to see them with our naked eye. Animals and plants have many features in common within a cell such
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Caution: Wear eye protection because of the possible shattering of dropped glassware and because acids are used in this experiment. Seliwanoff reagent is resorcinol dissolved in 4M hydrochloric acid. The acid is corrosive (burns human tissue). If any of this solution gets on your skin‚ wash the solution off immediately with water. Avoid breathing the vapors of the solution. Protect your hair‚ clothing and flammable materials from the open flame of the burner. Make sure the beaker is well supported when
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Broths were incubated at 370C for 24 hours. The cultures were then diluted 1:100 with fresh medium. Individual wells of sterile 96 well-flat bottom polystyrene tissue culture treated plates (Sigma-Aldrich‚ Costar‚ USA) were filled with 200 µL of the diluted cultures. The control organisms were also incubated‚ diluted and added to tissue culture plate. Negative control wells contained inoculated sterile broth. The plates were incubated at 370C for 24 hours. After incubation‚ gentle tapping of the
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LABORATORY 3: LABORATORY 3: Basic Chemistry for Investigating Living Systems Abstract The purpose of this experiment was to explain how colorimetry can be used to qualitatively detect cellular chemical components; to chemically differentiate between proteins‚ sugars‚ starches‚ and lipids; to identify the roles of molecular components in living systems; to comprehend the value of using a systematic approach to research; and to describe why hypotheses‚ controls‚ standards‚ and quality control
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