Biochemistry Chapter 7 2024 PDF

1.Dextrin is one of the salivary alpha amylase products upon its action on starch due to the fact that A. the enzyme hydrolysis (beta 1-4) bonds B. the enzyme hydrolyze (alpha 1-4) bonds C. amylopectin is a branched polymer D. the enzyme is inactivated in the stomach E. More than one answer is...

1.Dextrin is one of the salivary alpha amylase products upon its action on starch due to the fact that A. the enzyme hydrolysis (beta 1-4) bonds B. the enzyme hydrolyze (alpha 1-4) bonds C. amylopectin is a branched polymer D. the enzyme is inactivated in the stomach E. More than one answer is correct. 2\. By what point in the small intestine are most carbohydrates usually absorbed A. Duodenum B. Lower jejunum C. Ileum D. Colon E. More than one answer 3\. The functional group that classifies monosaccharides into aldoses and ketoses is: A. hydroxyl group B. thiol group C. methyl group D. carbonyl group E. acetyl group 4\. The major bonds in glycogen are: A. alpha 1-6 glycosidic bond B. alpha 1-4 glycosidic bond C. alpha 1-4 ester bond D. alpha 1-6 ester bond 4.What is the consequence of deficiencies in specific disaccharidase activities of the intestinal mucosa? A. Passage of undigested carbohydrate into the large intestine B. Decreased water absorption in the large intestine C. Enhanced bacterial fermentation in the small intestine D. Decreased osmotic diarrhea E. Increased absorption of monosaccharides 5\. Which of the following is the major cellular fuel and is the raw material for synthesizing glycogen? A. glucose B. amino acids C. glucose and glycerol D. glycerol E. fatty acids 6\. Which statement correctly describes the absorption of carbohydrate A. Galactose and glucose are transported into the mucosal cells by sodium dependent glucose cotransporter 1 (SGLT-1). B. More than one answer is correct C. Glucose uptake is insulin independent in mucosal cells of the jejunum. D. Galactose and glucose are transported into the mucosal cells by sodium independent glucose cotransporter 1 (SGLT-1). 7\. Which of these is broken down by salivary amylase A. Glucose B. Starch C. Maltose D. Cellulose E. Sucrose F. More than one answer 8\. How many glucose molecules are produced from one molecule of maltose A. 0 B. 1 C. 2 D. 3 E. 4 9\. Where does the final digestion of carbohydrate occur A. Stomach B. Lower intestine C. Oral cavity D. Upper jejunum 10\. What is a major consequence of undigested carbohydrate reaching the larg intestine A. Constipation B. Osmotic diarrhea C. Gastric ulcer D. Vitamin malabsorption 11\. Fructose absorption by intestinal mucosal cell required A. GLUT-2 transporter B. GLUT-5 transporter C. GLUT-1 transporter D. GLUT-4 transporter 12\. Glucose and Galactose absorption by intestinal mucosal cell required A. GLUT-2 transporter B. GLUT-5 transporter C. GLUT-1 transporter D. GLUT-4 transporter 13\. Which of the following false function of carbohydrate A. Energy B. Anticoagulant C. Serving as cell membrane D. A+C 14\. Lactase is produced in A. Mouth B. Intestine C. Stomach D. Pancreas 15\. The general empirical formula of carbohydrate A. (CHO)n B. ( C2H2O)n C. (CH2O)n D. None of the above 16\. Glucose uptake from intestinal cell A. Insulin dependent B. Insulin independent C. A+B D. None of the above 17\. According Lactose intolerance which is true A. Maltase enzyme deficiency B. Treatment for lactose intolerance patient by increased consumption of milk C. Caused by Increase in the amount of lactase enzyme D. Treatment of lactose intolerance by taking lactase in pill form prior to eating 18\. where dose the initial breakdown of carbohydrate begin A. Stomach B. Small intestine C. Mouth D. colon 19.Which of these is broken down by salivary amylase A. Glucose B. Starch C. Maltose D. Sucrose E. Cellulose 20\. Where does the pancreatic amylase act on carbohydrate? A. Mouth B. Pancreas C. Stomach D. Small intestine 21\. Which type of carbohydrate cannot be digested by human? A. Starch B. Lactose C. Mannose D. Cellulose 22\. What temporarily halt carbohydrate digestion when acidic stomach content reach small intestine A. Activation of salivary alpha amylase B. Hydrolysis of dextrin C. Inactivation of pancreatic alpha amylase D. Neutralization of stomach acidity by bicarbonate E. More than one answer