(mainly) copper sulfate and sodium hydroxide‚ is called Benedict’s reagent. It can be purchased from many drug stores because it was once the standard test for sugar in the urine of diabetics. Some of the solution to be tested (this could be the juice or extract of the fruit or vegetable in question) is mixed with Benedict’s test reagent (by volume‚ usually about 4 solution to 1 reagent) and heated almost to boiling. A color change from the blue of the reagent to almost any other color -- green
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Biology Revision Notes Biochemical Tests: Proteins - add biurettes reagent to the sample. If protein is present‚ clear colour change from blue to purple. Reducing Sugars – add Benedict’s reagent to the sample. Heat in Bunsen or water bath. If reducing sugars are present‚ clear colour changes from blue -> orange red precipitate. Lipids – dissolve sample in ethanol. Slowly pour the solution into the water slowly. If lipids are present a white emulation forms on the surface. Starch – add iodine
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DEFINITIONS * Biology is a natural science concerned with the study of life and living organisms‚ including their structure‚ function‚ growth‚ evolution‚ distribution‚ and taxonomy. * The cell is the basic structural and functional unit of all known living organisms. It is the smallest unit of life that is classified as a living thing (except virus‚ which consists only from DNA/RNA covered by protein and lipids)‚ and is often called the building block of life. Organisms can be classified
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Marine biology is more than the scientific study of marine life. Marine biology is the study of marine organisms‚ their behaviors‚ and interactions with the environment. Marine biologists study oceanography and the associated fields of chemical‚ physical‚ and geological oceanography. Marine biologists are also able to specialize in large aquatic animals‚ all the way down to microscopic and minuscule organisms. Anything else in between‚ marine biologists are able to study. Marine biology is known
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Biology Worksheet Name ________ Chapter 11.1 Period _____ Section 11.1 The Work of Gregor Mendel Matching. Select the letter in front of the term that matches the statement. Type the “upper case” letter in the “answer” column. Use red font color. Q Term Answer Statement 1. A. Allele Process in sexual reproduction in which male and female reproductive cells join to produce a new cell. 2. B. Fertilization A specific characteristic of an individual. 3. C. Gamete One
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w w w e tr .X m eP e ap .c rs om June 2003 GCE A AND AS LEVEL MARK SCHEME MAXIMUM MARK: 40 SYLLABUS/COMPONENT: 9700/01 BIOLOGY Paper 1 (Multiple Choice) Page 1 Mark Scheme A/AS LEVEL EXAMINATIONS – JUNE 2003 Syllabus 9700 Paper 1 Question Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Key D A C C A C D A B A B C B C D A D A C C Question Number 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Key D B B A C C B B C D A C C D B B D B B C
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`Biology B1 Revision Classification • Organisms were based into groups based on their characteristics (classification). • Kingdom‚ Phylum‚ Class‚ Order‚ Family‚ Genus‚ Species Kingdom Main Characteristics Animalia Multicellular; heterotrophic feeders so no chlorophyll‚ no cell walls; complex cell structure with nucleus Plantae Multicellular; autotrophic feeders using chlorophyll; cell walls made of cellulose; complex cell structure with nucleus Fungi Multicellular; cell walls not made
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Protein BIOL160: Lab Report 1 January 30‚ 2013 Lab partners: Park Jin Mun 0304299 Tan Zhi Chen 0306521 Hypothesis 1) If a calculated absorbance
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regarding the following specific issues? a. Should the company recall all of its fresh apple juice‚ just those batches considered potentially contaminated‚ or not recall any of the product? I think Odwalla should recall all of its fresh apple juice in order to prevent consumers from having to worry about purchasing the product and getting contaminated. Until the problem is solved fresh apple juice should not be distributed. b. Should the company admit responsibility immediately? If so‚ then
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discovered that harmless bacteria could turn virulent when mixed with bacteria that cause disease. A bacteria that is virulent is able to cause disease. Griffith had discovered what is now called transformation‚ a change in genotype caused when cells take up foreign genetic material. Avery’s Experiments In 1944‚ a series of experiments showed that the activity of the material responsible for transformation is not affected by protein-destroying enzymes. The activity is stopped‚ however‚ by a DNA-destroying
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