Background information: 1) What is diffusion? Movement of a particular type of molecule from an area of high concentration to an area of low concentration. 2) How is diffusion used by living cells? Living cells bring in food‚ water and oxygen‚ and excrete wastes through the process of diffusion 3) List two body systems in vertebrates that are dependent on diffusion Digestive system and respirational system 4) What is meant by the term metabolism the chemical processes that occur within a
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and uni- or polyporate. The mean life of a pollen grain is strongly influenced by its water content at dispersal: the lower the water content‚ the longer the mean life. Very dehydrated pollen usually has a high cytoplasmic mono-‚ oligo- and polysaccharide content and no starch‚ unlike only slightly dehydrated pollen which contains starch
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Title : Investigation of Action of Saliva and 3M HCl in Two Carbohydrates Solutions. Objective : To investigate the action of saliva and 3M hydrochloric acid in two carbohydrate solution. Result : Table 1 : The presence of starch and reducing sugar in the solution Observation Conclusion Solution A Benedict’s test : The transparent blue solution turns into opaque brick-red precipitate Iodine’s test : The clear colourless solution turns into transparent yellowish-brown
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1. Which of the following is NOT an essential nutrient? A) water B) alcohol C) vitamins D) minerals 2. Which of the following is a micronutrient? A) carbohydrates B) vitamins C) lipids D) alcohol 3. Christopher’s lunch contains 121 grams of carbohydrate‚ 40 grams of protein‚ and 25 grams of fat. What percent of kilocalories in this meal come from fat? A) 19% B) 26% C) 34% D) 42% 4. The building blocks of proteins are called: A) fatty acids.
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the color inside the tube did not change. 3. Yes Glucose moved out of the tube. The color changed from transparent to orange. The Effect of Weight on Diffusion: Molecule Molecular Formula Did it cross selectively permeable membrane Starch Polysaccharide made up of many Glucose molecules No Glucose C6H12O6 Yes The Effect of Weight on Diffusion’s Speed: We put 3 elements in a TSA plate and left them for 30 minutes to see where diffusion is faster‚ the results are: 1. Potassium permanganate
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biopolymers‚ such as polysaccharides‚ polyesters‚ and polyamides‚ are produced by microorganisms. Microorganisms are used for the biotechnological production of biopolymers with tailored properties suitable for high-value medical application such as tissue engineering and drug delivery. Microorganisms are used for the biosynthesis of xanthan‚ alginate‚ cellulose‚ cyanophycin‚ poly(gamma-glutamic acid)‚ levan‚ hyaluronic acid‚ organic acids‚ oligosaccharides and polysaccharide‚ and polyhydroxyalkanoates
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moisture Maintains osmoic balance and turgidity Saccharides : (a.k.a Carbohydrates) It is made up from Carbon‚ Hydrogen and Oxygen It is the main source of energy of cells. It can be divided into 3 groups – Monosaccharides‚ Disaccharides and polysaccharides. Monosacharides : They are known as simple sugars They cannot be hydrolysed/broken down into smaller units Eg. Glucose‚ Fructose‚ Galactose They are reducing sugars Disaccharides : They are formed by condensation reaction. Also
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alpha linked polysaccharides1. Starch is a complex carbon and is the main energy storage material found in plants and some bacteria. It is a major component of food as it supplies plants with energy and carbon. Starch consists of two types of polysaccharides called amylose and amylopectin1.The properties of starch can depend on the number of alpha 1‚4 glycosidic bonds and the nature of branching. It also is the starting material for ethanol production. Ethanol production is composed of 5 general steps
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Robert Sullivan Period 3‚ Biology 11/18/2007 Plant Cell Paper Plant Cell The plant cell is seemingly less complicated then the animal cells. Having the necessary nucleus which holds the cells DNA and produces ribosomes that help in the synthesis of proteins. Surrounding the nucleus is the rough and smooth endoplasmic reticulum. The two help break down and store materials. Rough stores and transports synthesized proteins‚ while smooth stores and transports synthesized lipid‚ steroid hormones
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Chem 31.1 Post Lab 3 CARBONYL COMPOUNDS AND CARBOHYDRATES HYDROLYSIS OF POLYSACCHARIDES - - Susceptible to both nucleophiles and electrophiles Presence of C=O TEST FOR ALDEHYDES AND KETONES - - Reaction with 2‚4-DNP (Dinitrophenylhydrazine) Positive: Formation of yellow precipitate IODOFORM TEST - Carbonyl compounds: Methyl ketones will give a positive result Postive: Yellow precipitate (CHI3) MOLISCH’S TEST for carbohydrates - TOLLEN’S TEST – for aldehydes
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