Hong Kong Diploma of Secondary Education Examination Integrated Science School-based Assessment Sample Tasks Teachers may use the sample tasks for non-profit making educational and research purposes with proper acknowledgement. © 2009 Hong Kong Examinations and Assessment Authority All Rights Reserved 2009 TABLE OF CONTENT Task C1 C2 C4 C5 C6 C7 C8 E3 Title Osmosis in Living Tissue Catalytic Activity of Enzyme Action of Electricity on Substances Encountered in Daily Life Do
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Name: __________________________ Date: _____________ |Link to: 23.1 The GI tract| 1.|Which of following processes is the function of the smooth muscle layer of the digestive system?| A)|Ingestion| B)|Secretion| C)|Mixing and propulsion| D)|Absorption| E)|None of the above| Ans:|C| |Link to: 23.1 The GI tract| 2.|Which of following processes is the primary function of the mouth?| A)|Ingestion| B)|Secretion| C)|Mixing and propulsion| D)|Absorption| E)|None of the above| Ans:|A|
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by soxhlet apparatus by using various solvents such as aqueous‚ ethanol‚ chloroform‚ petroleum ether and hexane. The various kinds of phytochemicals were detected and then in vitro antidiabetic activity of P. guajava were detected by using alpha amylase and alpha glucosidase enzyme in an in vitro model.The study reveals the presence of phytochemicals such as carbohydrate‚ tannin‚ flavonoids‚ phenols etc.‚ Among the various extracts the aqueous and ethanolic extracts which contains the large number
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digestion to occur faster. The presence of the food in the mouth stimulates exocrine glands. This causes the mouth to secrete digestive enzymes‚ namely salivary amylase. These secreted enzymes aid in the breakdown of foods‚ officially starting the digestion process. Carbohydrates in particular are mostly broken down by salivary amylase. Salivary amylase breaks starch‚ a popular carb‚ down to maltose. This means that the bread of the ham and cheese sandwich will notably be chemically altered at this point
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ano C anal fissure D internal haemorrhoids Answer 4 In regards to acute pancreatitis‚ which set of admission lab values is MOST predictive of severe disease? A WBC 18‚000; LDH 370; Glucose 20 B Amylase 650; WBC 18‚000; PaO2 65 C LDH 370; Amylase 800; Albumin 3.2 D HCT 33; LDH 370; AST 250 Answer 5 A 50-year-old man presents with fever 3 days after having an inguinal hernia repaired. The MOST likely etiology of his fever is A urinary tract infection
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Saliva contains a digestive enzyme called salivary amylase which breaks down covalent bonds between glucose molecules found in starches. Due to the brief time food is in the oral cavity only about 5% of carbohydrates are digested in the mouth. Saliva also protects the mouth from bacterial infection by producing
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DIGESTION OF CARBOHYDRATES Digestion of carbohydrate begins in the mouth‚ with the secretion of the enzyme salivary amylase from the serous cells of the salivary gland. This enzyme breaks starch and glycogen into disaccharides. The mucous cells of the salivary gland secrete a mucus‚ which causes the food to stick together‚ and acts as a lubricant to aid in swallowing. The salivary glands are grouped into three categories: the parotid gland‚ submandibular glands‚ and sublingual‚ all located
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Centre Number Surname Other Names Candidate Signature Candidate Number For Examiner’s Use Examiner’s Initials Question Mark General Certificate of Secondary Education Foundation Tier January 2012 1 2 3 4 5 6 7 8 Additional Science Unit Biology B2 BLY2F Biology Unit Biology B2 Written Paper Tuesday 24 January 2012 For this paper you must have: a ruler. You may use a calculator. F 9.00 am to 9.45 am 9 TOTAL Time allowed 45 minutes Instructions Use black ink or black ball-point
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LABORATORY REPORT (Click on the Save a Copy button on the panel above to save your report) Activity: Name: Instructor: Date: Enzyme Activity cheryl yelton November 30‚ 2014 Predictions 1. Sucrase will have the greatest activity at pH 6 2. Sucrase will have the greatest activity at 40 °C (104 °F) 3. Sucrase activity increases with increasing sucrose concentration. Materials and Methods Effect of pH on Enzyme Activity. 1. Dependent Variable. amount of product (glucose and fructose) produced 2.
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PLANT RESPONSES TROPISM is a biological phenomenon‚ indicating growth or turning movement of a biological organism‚ usually a plant‚ in response to an environmental stimulus. In tropisms‚ this response is dependent on the direction of the species. The word tropism comes from the Greek trope ("to turn" or "to change"). Tropisms are usually named for the stimulus involved and may be either positive (towards the stimulus) or negative (away from the stimulus). Phototropism is the growth response
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