Effects of pH on fungal amylase activity BI 211 November 25‚ 2011 Introduction In recent years‚ the uses of microorganisms have become a huge importance to industry and sparked a large interest into the exploration of enzyme activity in microorganisms. Amylase is one of the most widely used enzyme required for the preparation of fermented foods. Apart from food and starch industries‚ in which demand for them is increasing continuously‚ amylase is also used in
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OSMOSIS Aim To determine the water potential of potato tuber cells. Background knowledge Osmosis is defined as the movement of water molecules from a region of higher water potential to a region of lower water potential through a partially permeable membrane. Osmosis is considered in terms of water potential and solute potential. Water potential is a measure of the kinetic energy of water molecules. Here‚ water molecules are constantly moving in a random fashion. Some of them collides with cell
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Study Guide Notes ¡V Test 1 CHAPTER 1 1. Linnaeus ¡V naming system Hooke ¡V cells in cork Van Leeuwenhoek ¡V animalcules (1st obs. of live microorganisms) Redi ¡V experiment to disprove spontaneous generation ¡V meat Needham ¡V experiment to prove spontaneous generation ¡V broth (vital force) Spallanzani ¡V heated broth did not develop microbial growth Virchow ¡V biogenesis (living can only arise from preexisting living) Pasteur ¡V air contained‚ but did not produce‚ microbes (broth‚ s-flasks);
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Carbohydrates‚ Proteins‚ lipids‚ and nucleic Acid Lab Exercise 6 Date: 9/17/12 Bio 102-11 Purpose the purpose of this experiment was to perform test to detect the presence of carbohydrates‚ proteins‚ lipids‚ and nucleic acids. Explain the importance of a positive and a negative control in biochemical test. Use biochemical test to identify an unknown compound. Background Most organic compounds in living organisms are carbohydrates‚ proteins‚ lipids‚ and nucleic acids they are called macromolecules
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History Of Spice Egyptians used a lot of spices for cooking and stuffed mummies Burned cinnamon to hide stench First recorded spice Traded spice with India Spice trade silk road All roads go to fertile crescent Arabs created a monopoly on the spice trade moving toward Europe Arabs Kept Europeans in the dark about the source of spices brought from India Created secrets and Myths Might boil seeds so Europeans couldn’t grow it Crusaders brought back new spices when they returned from battle
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cyst- bladder : (cystoscopy) 33. cyt- cell: (cytology) 34. -cyte cell: (osteocyte‚ leukocyte‚ erythrocyte) 35. dendr- tree: (dendrite) 36. dent- tooth: (dentist‚ dentition) 37. derm- skin: (dermis) 38. di- two: (disaccharide) 39. diastol- dilation: (diastole‚ diastolic) 40. dis- to undo; free from: (dislocation‚ disorder) 41. dors- back: (dorsal) 42. dur- hard: (dura mater) 43. ecto- outside: (ectopic pregnancy) 44. -ectomy excision or surgical
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Many Americans can tell you what components make up their food. Looking at a nutrition facts label‚ they can tell you the content of fat‚ carbohydrate‚ and protein in the foods they eat. Many participate in low carbohydrate dieting‚ one of the most popular diets around. Others have opted for the United States Department of Agriculture ’s low fat diet‚ but neither understands the chemistry of the body or may have misinformation about these compounds. Not many Americans can tell you confidently what
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Lactase is an enzyme that splits up the disaccharide lactose into monosaccharides glucose and galactose‚ but its function diminishes with age resulting in a wide use of lactase supplements. This enzyme functions under specific conditions‚ so we investigated the effect different salt concentrations have on the enzyme activity. Serial dilutions were performed to prepare a lactase solution as well as twenty percent‚ fifteen percent‚ and five percent concentrations of NaCl. Three different treatments
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BIO 101 – HUMAN BIOLOGY Midterm Exam I – Fall 2007 Please fill in your name and (SOLAR) ID number on your answer sheet before starting. Do not write anything under the column marked birthdate!!!!! Keep the opscan sheet that came with your test and do not use ANY other opscan form or you risk a misgrading. Answers to the multiple choice questions must be filled in on the answer sheet with a #2 pencil. There are 40 multiple choice questions. Answer sheets will be collected when time is called at 8:10
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sugars‚ iodine test (test for starches)‚ emulsion test and the biuret test. Carbohydrates include reducing and non-reducing sugars also starches. They have a general Formula of CnH2nOn.They can be classified into three main groups‚ Monosaccharide‚ Disaccharide and polysaccharide. Carbohydrates have many uses such as: for energy‚ for storage of food in both plant and animal cells e.g. Starch‚ chloroplasts‚ for structure in plant cells e.g. cellulose have a structural use in plant cell walls giving it
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