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Science Essay Examples

Dna Transcription, Translation Quiz Study Guide

Study Guide 3/1/11 1. Describe the three parts of a nucleotide and how they bond to form a nucleotide. The three parts of a necleotide are a carbon sugar, a phosphate group and a nitrogenous base. The carbon sugars bond to the phosphate groups by covalent bonds while the nitrogenous base bonds with it’s compliment…

Osmosis in Onion Cell

A living plant cell will shrinks or swells depending on the solute concentration of the cell in relation to the solute concentration of the fluid surrounding the cell (1). It follows that water will move from a region of high water concentration to a region of low water concentration, therefore, if a cell is placed…

How temperature will effect the speed in which the enzyme Catalase will react with Hydrogen Peroxide

Individual enzymes are named by adding ase to the name of the substrate with which they react. The enzyme that controls urea decomposition is called urease; those that control protein hydrolyses are known as proteinases. Some enzymes, such as the proteinases trypsin and pepsin, retain the names used before this nomenclature was adopted. * They…

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The effect of temperature on the hydrolysis of starch using amylase extracted from barley

Enzymes are a class of proteins that catalyse chemical reactions, which increases the rate of a metabolic reaction. Most enzymes are specific, working on a particular or class of reactions. In this case I am using an enzyme known as amylase (a group of enzymes which convert starch to sugar), which is an important metabolic…

Enzyme Experiment with Temperature

Enzymes are catalysts in the body that speed up the breakdown of food, and are essential in the digestive system. Although food can be broken down by molecules colliding with it, the process is speeded up greatly by enzymes, a type of catalyst. We know from previous knowledge that enzymes are proteins, and they require…

Investigation of Photosynthetic Pigments in Spinach

Investigation of Photosynthetic Pigments in Spinach Michael Yacoub BIOL&211 Lori Hayes Introduction: Purpose: To demonstrate the existence of the pigments of photosynthesis in spinach by separating them using chromatography, then measure them using spectrometry. There are multiple pigments in photosynthesis, the varying pigments allow the plant to absorb light at various wavelengths which allows the…

Theory of Spontaneous Origin and Biogenesis

INTRODUCTION Robert. C. Gallagher once said: “Change is inevitable- except from a vending machine. ” “Change” is the word the practically governs our world today. Everything is slowly and gradually changing, new technologies and opportunities boosting everywhere. But the underlying question which we all wishfully choose to ignore is “All the changes happening is for…

Protein and Skill

The Structure and Function of Large Biological Molecules In Chapter 5, the principles of chemistry covered in earlier chapters are applied to the understanding of biological polymers and lipid membranes. The emphasis is on properly linking monomers and their polymers, and on the structural and functional diversity of the different polymer types. Particular attention is…

Gfp Lab Report

All four of the wells were condensed with I Pl of an enhancer and added too lipid-based transaction reagent Effected to allow the target DNA to be introduced into the Hell cells. The cells containing . 45 ml Of transaction complexes and complete growth medium were incubated for two days and then replaced With I…

Biology Practical to Study the Osmosis Effects of Sucrose

The plant cells used in the experiment are potato and Chinese radish tissues that are used as chips because the results and changes are easy to note and record in this way. As plant cell membranes are differently ramble, different results are expected from the Chinese radish and potato chips in the same conditions; this…

Diffusion and Osmosis Lab Report

We therefore concluded that only small molecules like glucose and iodine can permeate through the bag, starch is too large. Introduction This lab has several key objectives. First, to learn about diffusion and osmosis, and the different factors that affect the rate at which these processes take place. In order for cells to maintain a…

Micro Unknown Lab Report

The rationale of performing these tests was to distinguish six different microbes room one another and to compare how their metabolic and biochemical processes differ from species to species to determine the unknown sample. The tests included: Triple sugar iron agar (TSAR), the Sulfide Indolent Mobility (SIMI) test, Glucose fermentation, the Methyl Red test, the…

Gram Negative Unknown Lab Report

E. Coli is most commonly found in the intestines of warm blooded organisms. Most E. Coli strands are non pathogenic however, there are strands known to cause food poisoning. Introduction There are multiple reasons for identifying unknown bacteria. In research, it is a must to be able to identify unknown bacteria if you are comparing…

Ap Bio Lab Report

Because segments interact with light, they are very useful to authoress. These pigments help the User gain energy. Because pigments only absorb a narrow range of light, many different color pigments are needed to capture more of the sun’s energy. There are three basic classes of pigments which are chlorophyll, carotenes, and physicians. There are…

Hemolysis Lab Report

Organisms also have white blood cells, also referred to as leukocytes, which mamba foreign antibodies in the immune system. White blood cells are complex in structure, and in contrast to red blood cells, have a nucleus. They include such cells as lymphocytes, monocot’s, sinkholes, interruptions and basophilic. While some cells such as lymphocytes make antibodies,…

Biology Lab Report

Fungal and bacterial amylase are the enzymes that we going to study for their ability to break down starch. In order to determine how temperature affects the activity of amylase enzyme and the optimal temperature for fungal and bacterial amylase, the activity of these enzymes were tested at different temperature and times and iodine was…

Transpiration Lab Report

When water is transported from the roots to the mesosphere cells in the leaves, it is evaporates out the stomata, called transpiration, to create a lower osmotic potential. Osmotic potential is the part of the water potential of a tissue that results from the presence of solute particles. Even though the stomata open to release…

Amylase lab report

Enzymes are very specific; for example, amylase is the only enzyme that will break down starch. It is similar to the theory of the lock and the key. The enzyme is the lock and the key is the substrate; only the correct key could fit into the keyhole of the lock. Porcine pancreatic amylase is…

The Cenozoic Era

The Cenozoic Era, which describes the period 65 million years ago (mya) to the present, is a very phase in evolution because it involved the emergence of a variety of species from plants, arthropods, fishes, reptiles and mammals.

Lab report on enzyme activity.

The reactant an enzyme acts on is referred to the enzyme’s substrate. The enzyme will combine with or to its substrate. While the two are joined, the substrate is converted to its product by catalytic action of the enzyme. There is an active site of the enzyme molecule which is a restricted region that actually…

DNA Structure and Function Lab Report

Complementary bases Guanine is the complementary base of cytosine, and adenine is the implementers base of thymine in DNA and of oracular in RNA Double helix A pair of parallel helices intertwined about a common axis, especially that in the structure of the DNA molecule. EXERCISE 1 -DNA structure Which carbon atom (position) in the…

Yeast Population Lab Report

The biotic factor being tested here is what effect the temperature of he yeast’s environment has on its ability or inability to reproduce efficiently. The lab tests the yeast in three separate temperature settings: a cold temperature (ICC), room temperature (ICC), and a hot temperature (ICC). Here, the independent variable is the temperature of the…

Synthesis of Cinnamaldehyde

Paper on Cinnamaldehyde Synthesis I. Introduction Cinnamaldehyde, cinnamic aldehyde or 3-phenyl-2-propenal is the major constituent of cinnamon oil, extracted from several species of Cinnamomum (C. verum, C. burmanii, C. cassia), under the family Lauraceae, a group of evergreen trees. Cinnamon bark (particularly C. verum) yields 0. 4-0. % oil, which contains 60-80% cinnamaldehyde, 4-5% sesquiterpenoids…

Poikilohydry in mosses: an ecological limitation or opportunity

The most significant evolutionary event in the history of the plant kingdom began with the migration of aquatic photosynthetic organisms on to land approximately 475 Myr ago 1,2. Terrestrial embryophytes (referred to as embryophytes) derived from algal ancestors constitute two divisions, the bryophytes (lacking vascular tissue) and the tracheophytes (possessing vascular conducting tissues) 2. The…

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