Publication No. 11137 Enzyme Activity Guided Inquiry Lab Turnip Peroxidase Introduction Peroxidase enzymes are widely distributed in plants and animals‚ including bacteria‚ to protect cells against the effects of oxidative stress and cell damage due to hydrogen peroxide. Peroxidases are easily extracted from turnips and other root vegetables and provide a model enzyme for studying enzyme activity—how the rate of an enzyme-catalyzed reaction depends on biotic and abiotic factors. Enzyme activity
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ICSE X | CHEMISTRY Board Paper – 2015 ICSE Board Class X Chemistry Board Paper – 2015 Time: 2 hrs Max. Marks: 80 Answers to this Paper must be written on the paper provided separately. You will not be allowed 10 write during the first 15 minutes. This time is to be spent in reading the Question Paper. The time given at the head of this paper is the time allowed for writing the answers. Section I is compulsory. Attempt any four questions from section II. The intended marks for questions or parts
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solution‚ KOH‚ 0.01 M Graduated cylinder‚ 25-mL Sodium bicarbonate solution‚ NaHCO3 ‚ 1% Pipets or droppers Sodium hydroxide solution‚ NaOH‚ 0.01 M Test tubes‚ 13 × 100 mm Yeast‚ suspended in 1% NaHCO3 solution Water bath Safety Precautions Dilute acids and bases are skin and eye irritants; they are slightly toxic by ingestion and inhalation. Wear chemical splash goggles‚ chemical-resistant gloves‚ and a chemical-resistant apron. Please review current Material Safety Data Sheets for additional
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emergency and if not reversed can lead to death. Sweating during exercise that is not compensated by drinking extra fluids; exercise even in cold weather can cause sweating. Hot‚ humid weather‚ High altitude‚ which causes rapid breathing and increased urine output‚ Illnesses such as poorly controlled diabetes‚ and illnesses that cause vomiting‚ diarrhea‚ or fever‚ Pregnancy‚ and Certain medications. Each of these conditions alone can contribute to dehydration; a combination of them can cause it more quickly
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* A reactant in an enzyme-catalyzed reaction is called a substrate. The area of the enzyme that binds to the substrate is called the active site - where the action takes place. * Cofactors and coenzymes are small molecules or ions that help enzymes to act. HSC Biology Notes – Hugh Phillips Maintaining a Balance 1.Most organisms are active in a limited temperature range: Identify the role of enzymes in metabolism‚ describe their chemical composition and use a simple model to describe their
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the cell surface membrane‚ thus making walls more permeable to water. When ADH is increased in the blood flow‚ more water-permeable channels are inserted‚ allowing more water to be reabsorbed by osmosis into the blood stream. When this happens‚ less urine‚ of a much lowered water potential‚ passes out of the body. This suggests that due to the cell walls being more permeable to water and also osmosis reabsorbing the water‚ this in turn lead to Leah’s water intoxication‚ as it was stored in the body
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and solute concentration • Kidneys are major excretory organs o Like a city’s water treatment plant! • Urinary bladder is the temporary storage reservoir for urine • Ureters transport urine from the kidneys to the bladder • Urethra transports urine out of the body • How does the urinary system control pH? o Regulation of plasma hydrogen ion concentration (pH). The kidneys partner up with the lungs and they together
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permeable". Take a look at the following animation; If a selectively permeable membrane separates the two solutions‚ water moves through it in both directions at the same time. However‚ more water leaves a dilute solution (high water concentration) and passes into a more concentrated solution (low water concentration) than enters it. Although the water appears to move across the membrane in one direction‚ it is in fact moving in both directions but more one way than the other. When the concentration
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Energy Drinks Many energy drinks are found in the market and many people are consuming them without knowing the bad effects on their health‚ having the misconception that they help in enhancing and boosting the body energy. Ingredients: Other than the caffeine and carbohydrates energy drinks contain: B vitamins: Energy drinks contain B vitamins that exceed the daily-recommended amounts. Gingko: German pharmacological studies suggest that this herb increases blood flow to the brain
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Breast cancer will met to the bone and brain lung and liver Risk factors: menarche b4 12 menopause after 55 obesity high fat diet family hist 1st degree relative birth of 1st child after 30 birth control pills and hrt ( Dr should be notified cause can make breast dense and harder to image) S/S: lumps in breast increased vascularity breast pain or soreness nipple retraction or ulceration Screening: breast self exam 7-10 days after menses
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