a. true. Answered: Which of the following is true about… | bartleby (i) enzymes lack in nucleophilic groups (ii) enzymes are highly specific both in binding chiral substrates and in catalyzing their reactions (iii) enzymes catalyze chemical reactions by lowering the activation energy (iv) pepsin in proteolytic enzyme Enzymes Questions and Answers | Study.com True False 2. Sympathetic nerve fibers can cause the release of HCl from parietal cells. Cells divide to form daughter cells. Which of the following is not true about pepsin? Which of the following statements about this enzyme is true? Answer Key Testname: DIGESTIVE SYSTEM PRACTIEC TEST 50) E 51) A 52) E 53) A 54) A 55) E 56) 1. D. when the pH of the chyme is less than 3. Answer to 1. The hydrochloric acid secreted by oxyntic or parietal cells brings about activation of pepsinogen to pepsin. A. D. HCl converts pepsinogen to pepsin, which starts the complex process of protein digestion 44. C. when the pH of the chyme is greater than 3. MCQs - PHARMACOLOGY: Drugs acting on GIT | PFMSG FORUM Biology Exam 4-part2 Ch21 - ProProfs Quiz The answer is A. Enzymes increase the rate of chemical reaction by lowering activation energy barriers.Enzymes are biological catalysts. Kurangkan suhu kukus air kepada 30°C. Cimetidine has no effect on hepatic drug metabolism. It is involved in the chemical digestion of carbohydrates It is involved in chemical digestion of proteins It works in the stomach Its inactive form is called pepsinogen "Heartbum" and GERD are caused by: A bacteria called Helicobacter pylori Reflux of gastric juice from the stomach into the esophagus A blood . The urethra and the urinary bladder empty the urine. Which one of the following is true about enzymes? Enzyme catalyse chemical reactions by lowering the activation energy. B. . This statement is true. Therefore, pepsin gets denatured in the small intestine. a) pepsin trypsin breaks down dietary protems and also activates the zymogen forms of other digestive proteases b) c) the pancreatic zymogens are trypsinogen, chymotrypsinogen, procarboxypeptidase, and proelastase; the gastric zymogen is pepsinogen d) the mature, proteolytically active form of chymotrypsin . Pepsin cleaves proteins into smaller polypeptides. The optimum pH for activity of pepsin is 1.8. protease breaks down lipids into fatty acids and glycerol. Pepsin a) is manufactured by the pancreas. B. Pepsin works best in an alkaline environment. Flashcards - Digestion Epiglottis is meant for protecting (a) oesophagus from entry of air (b) nasal chambers from entry of food (c) larynx from entry of food (d) teeth from caries 2. a) Ranitidine b) Cimetidine c) Famotidine d) Nizatidine 4) All of the following statements about antacid are true except: a) Weak bases that neutralize gastric pH b) Inhibits the formation of pepsin c) Aluminum antacids cause diarrhea and magnesium antacids cause constipation Of the following statements about enzymes, which ones are true? . mucus protects the stomach lining from digestive secretions. The salivary pepsin test is a non-invasive, low-cost test that can detect the presence of pepsin in saliva, as the name implies. Learn about the functions and uses of pepsin. asked Aug 24, 2019 in Nutritional Science by Christiana. Most pepsin is released directly from chief cells. SURVEY . Biology 12: Self Test 9 lipase breaks down proteins in the small intestine. )True b. pepsin. 12. If both assertion and reason are true and reason is the correct explanation of assertion. Which of the following is true of interstitial fluid? (1) Aegilops Squarossa (2) Triticum dicoccum (3) Aegilops speltoides (4) Raphanus sativus 188. The enzyme pepsin is secreted in the inactive form pepsinogen by peptic cells. Choose the correct one (a) Pepsin (b) Mucus (c) Salivary amylase (d) Bile Soln: Answer is (b) Mucus 7. Pepsin accelerates fat digestion. Which of the following drugs may cause reversible gynecomastia? If both assertion and reason are true but reason is not the correct explanation of assertion. Pepsin breaks peptide bonds and cleaves proteins into smaller polypeptides; it also helps activate more pepsinogen, starting a positive feedback mechanism that generates more pepsin. a. Pepsin is secreted in the stomach, whereas trypsin is a component of pancreatic juice. MCQ of Life Processes | Chapter 6 | Science | Class 10 ... Put the following events of an enzyme catalytic cycle in order. a. enzyme changes shape b . A. it becomes inactive B. it begins to replicate C. its shape changes to engulf large proteins D. its activity increases to digest more proteins A. it becomes inactive Starch, glycogen and cellulose are all chains of these monomers. C) involves both neural and endocrine reflexes. Question 23. It forms the extracellular matrix of connective tissue. Enzymes are proteins made by combining a large number of amino acids together. Which of the following substances is a zymogen? c. There is only one layer of smooth muscle in the muscularis externa of the stomach. They recognize and cut specific sequence of DNA or polypeptides. The enzyme pepsin begins the digestion of: answer choices . A. adherent layer of mucus B. bicarbonate C. gap junctions between epithelial cells D. rapid turnover of epithelial cells True / False Questions. What is the most correct about enzymes? Frenulum is (a) adenoid present on pharyngeal walls (b) tonsil found on lateral walls of […] All of the following are true of high quality protein except a) it provides 7 kcal/g of energy a. pepsin, protein, water, body temperature b. pepsi, protein, water, body temperature, HCl (hydrochloric acid) Explain. In the absence of HCL secretion, inactive pepsinogen is not converted into the active enzyme pepsin. 12.Which of the following organic compounds is the main source of energy for living things? (ii) Left ventricle pumps oxygenated blood to variable parts of the body on the other hand . Which of the following is NOT a barrier to acid and pepsin damage in the stomach? c. Pepsin is essential for protein digestion. Which of the following most likely happens in to pepsin as it enters the small intestine? Pepsin is most active at high pH.c. 09. The following diagram shows the action of protein digesting enzymes of pancreas. B. Activity was the highest at pH 2.0 because it is the most similar to the pH in the stomach. For the following questions two statements are given- one labeled Assertion (A) and the other labeled Reason (R). Pepsin is secreted by the pancreas. Pepsin cut non-specifically within polypeptide. BAB 5: Metabolisme dan Enzim 6. 23. Pepsin, powerful enzyme in gastric juice that digests proteins such as those in meat, seeds, and dairy products. Answer: a b) Which of the following hormones is released during stressful times to increase blood glucose levels, making more energy available for use? d) trypsin. Pepsin would have the greatest activity A. immediately upon secretion into the stomach. Nutrients absorbed by the intestines move directly to the liver, which. a. salivary amylase and lipase. A. D. Acid activates pepsin in the stomach. In human digestive system the enzymes pepsin and trypsin are secreted respectively by : (a) Pancreas and liver (b) Pancreas and gallbladder (c) Stomach and pancreas (d) Stomach and salivary glands. carbohydrates. Which of the following is the correct statement regarding bile ? d) Trypsin. 21.17 d [Algorithmic] In which of the following pairs of vitamins are both members of the pair water-soluble? So, cat. Two enzymes involved in the digestion of proteins are. Diretions: Read the following statements. Most pepsin is released directly from chief cells.b. Identify the correct statements from the following: (a) C O 2 ( g) is used as refrigerant for ice-cream and frozen food. Reason: Pepsin converts protein into proteoses and peptones. A)The activity of pepsin will speed up in the small intestine because the pH becomes less acidic. … Treating a protein with acid, heat, or agitation will cause _____, meaning that the three-dimensional structure of the protein has been altered (it unfolds). All of these. 9. A. Bicuspids. (d) C O is colorless and odourless gas. c) splits maltose into monosaccharides. d. There is an additional third oblique layer of smooth muscle. Tick the drug forming a physical barrier to HCL and Pepsin: a) Ranitidine b) Sucralfate c) Omeprazole d) Pirenzepine A. control of heredity B. fighting disease C. control rate of reactions D. formation of bones and muscles 14. Enzymes do not alter the overall change in free energy for a reaction. a) acid activates pepsin b) pepsin acts on food in the stomach c) pepsin works best in an alkaline environment d) amino acid chains are the digestive products of its action. pepsin is an antibacterial agent that kills some bacteria. A. Pepsin is an amino acid. c) pepsin works best in an alkaline environment. Which of the following is not true about these zymogens and proteases? Pepsin is a strong endopeptidase and breaks proteins into smaller molecules like peptones, proteoses and peptides. question_answer 127) The following is a scheme showing the fate of carbohydrates during digestion in the human alimentary canal. D. Digestion of Cellulose by digestive enzymes. A. Amino acid chains are the digestive products of its action. Answer: Ooh. Pepsin; None of the above . Obesity is defined as a body weight of more than 20% above the ideal weight. Next >> Question 2: Which of the following comparison between restriction enzyme EcoRV and protease Pepsin is CORRECT? Which of the following is true about pepsin? What is the most correct about enzymes? 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