EXPERIMENT: Biological Molecules Here are your goals for this lesson: • To conduct tests for glucose‚ starch‚ lipids and proteins • Use these test results to identify the biological molecules found in food Student Name: Brittany Gerdes Date Experiment done:12-20-12 Date Report Completed: 12-20-12 Name of Grader: Hypothesis: A prediction of what you think the results of the project will be. Write your hypothesis before you begin the experiment and‚ if the experiment has
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water constant and we did not let it boil because this could affect the pigment released by the beetroot‚ it could potentially denature the membrane of the beetroot. Hydrochloric acid in other words‚ the pH can affect the membrane affecting the proteins that make up cell membranes therefore allowing the beetroot pigment to leek into the acid. To put the effect of Ethanol short for the absorbance‚ ethanol= alcohol and cell membrane= phospholipid. All lipids are soluble in alcohol thus it increases
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acid B. Attenuation does not occur in eukaryotes C. During attenuation tryptophan molecules directly inhibit transcription of the Trp operon D. Tryptophan in the cell affects the rate of translation of tryptophan codons near the start of the Trp protein E. Presence of excess tryptophan results in premature termination of transcription. 3. The cell-cycle checkpoint that occurs during mitosis causes nuclear division to pause until A. DNA replication is complete. B. all chromosomes have attached
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destroys the cell membrane‚ and the permeability of the cell membrane is disrupted casing red pigments to leak out by diffusion. Biological principle: The cell membrane is mainly made up of phospholipids and proteins. The phospholipid molecules are arranged in a bilayer. And there are some proteins molecules are interspersed among the phospholipid bilayer. This structure makes the cell membrane differentially permeable. Thus‚ some large molecules can’t pass through the cell membrane. The cell membrane
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material must be ‘something’ from the chromosome A chromosome consists of DNA & proteins! Is the genetic material DNA or Protein? •DNA consists of only four different subunits (A‚ T‚ C‚ G) •Chromosomes contain less DNA than protein by weight •Chromosomes contain more protein than DNA by •weight •Protein has 20 different subunits (amino acids) so it has a greater potential for variety of combinations •Diverse proteins were identified Experiments demonstrating that DNA is the genetic material
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Miller‚ Suzuki‚ Leontin‚ Gelbart © 1996 by W. H. Freeman and Company. Used with permission.) A. Isolating DNA 1. Crude isolation of donor (foreign) DNA is accomplished by isolating cells à disrupting lipid membranes with detergents à destroying proteins with phenol or proteases à degrading RNAs with RNase à leaving DNA at the end 2. Crude isolation of plasmid vector DNA is accomplished by an alkaline lysis procedure or by boiling cells which removes bacterial chromosomal DNA from plasmid
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____________________________________________________________________________ Ginataang Adobong Manok sa Piña with cheese and chili I. Ingredients 1 kg chicken (adobo cut) 3 cloves garlic 1 medium onion 60mL (1/3 cup) soy sauce 50mL (1/4 cup) cane vinegar 240 mL of Pineapple Juice 5 pieces wild chili (siling labuyo) ¼ tsp. of pepper 2 tbsp. of olive oil 1 piece chicken broth cube 2 tbsp. oyster sauce 45g cheese 180mL Coconut milk (kakang gata) II. Procedure 1. Pound 3
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Comparison of Plant and Animal Cells Introduction Eukaryotic cells are very complex; there are many organelles‚ each serving a distinct function‚ present in eukaryotic cells. We can divide the eukaryotic group of cells in to two main groups‚ according to the presence of these membrane bound organelles‚ and the structural differences amongst the cells and their organelles. The two groups of eukaryotic cells are plant and animal cells. Nucleus The reason that plant and animal cells are not divided
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correctly 2) What are the most abundant elements in living material? Carbon‚ Hydrogen‚ Oxygen‚ Nitrogen‚ Sulfur and Phosphorus 3) What are the 4 major biological macromolecules? Carbohydrates (monosaccharides & polysaccharides)‚ lipids‚ proteins‚ & nucleic acids. 4) What is the original colour of iodine‚ and what colour does it turn in presence of starch and glycogen? Starch: yellow --> blue-black (amylase in starch reacts with iodine) Glycogen: yellow --> reddish-brown (due to the
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wheat bran added back in as a separate ingredient (as opposed to occurring in its natural form). The Nutrition Action Healthletter says that there “isn’t good evidence that these lower the risk of heart disease‚ constipation‚ and diabetes the same way intact fiber‚ the
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