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- Carbohydrate ii
These are exercise test questions to help build your knowledge of carbohydrate lectures. This will help expand your knowledge on the topics to maximize learning at a deeper level, build confidence and help you succeed in the course.
| 1. Which of the following complex carbohydrates can reduce the absorption of cholesterol inside the intestinal tract? |
| A. |
Glycogen |
| B. |
Soluble fibers |
| C. |
Insoluble fibers |
| D. |
Amylose |
| E. |
Amylopectin |
| 2. What is the metabolic function of the intestinal glycosidases? |
| A. |
Breaks down smaller carbohydrates into glucose, fructose and galactose. |
| B. |
Cleaves hydroxyl groups of dietary complex carbohydrates molecules. |
| C. |
Digests dietary complex carbohydrate in the mouth and the stomach. |
| D. |
Joins two simple sugars together to form complex carbohydrate molecules. |
| E. |
Allows passage of simple sugars inside the intestinal cells. |
| 3. A patient's laboratory test is positive for fructose in urine only. All blood test results are normal. Which of the following enzymes is deficient in this patient? |
| A. |
Aldolase B |
| B. |
Phosphoglucomutase |
| C. |
4-Epimerase |
| D. |
Fructokinase |
| E. |
Galactokinase |
| 4. A 9 month old male suffers from abdominal pain and bloating with frequent diarrhea after being fed solid foods. A stool acidity test is ordered. Which of the following carbohydrate disorders uses a stool acidity test as a diagnostic tool for infants? |
| A. |
Fructose Intolerance |
| B. |
Fructose Malabsorption |
| C. |
Fructosuria |
| D. |
Classical Galactosemia |
| E. |
Non-classical Galactosemia |
| 5. A patient's test results show hypoglycemia, liver failure, hyperuricemia, prolonged coagulation times and a positive urine test for fructose. Which of the following carbohydrate disorders is consistent with these lab results? |
| A. |
Fructosuria |
| B. |
Galactokinase Deficiency |
| C. |
Classical Galactosemia |
| D. |
Fructose Intolerance |
| E. |
Fructose Malabsorption |
| 6. Which of the following defective enzymes impairs carbohydrate metabolism by forming phosphorylated intermediates that can cause mental retardation or severe liver damage if left untreated? |
| A. |
Lactalbumin and glycosyltransferases |
| B. |
Fructokinase and aldose reductase |
| C. |
Galactosyltransferase and phosphoglutamase |
| D. |
Galactokinase and aldolase B |
| E. |
Galactose 1-phosphate uridyltransferase and 4-epimerase |
| 7. What is the metabolic function of the two subunits of lactose synthase? |
| A. |
Lactalbumin synthesizes prolactin and galactosyltransferase synthesizes cortisol. |
| B. |
Lactalbumin synthesizes lactoglobulin and glycosyltransferase synthesizes casein. |
| C. |
Lactalbumin increases the catalytic rate of galactosyltransferase and galactosyltransferase synthesizes lactose. |
| D. |
Lactalbumin synthesizes colostrum and galactosyltransferase synthesizes mature milk. |
| E. |
Lactalbumin converts glucose to galactose and galactosyltransferase degrades galactose. |
| 8. Which of the following enzymes is responsible for the rapid drug clearance of barbiturates? |
| A. |
Debranching enzyme |
| B. |
Glycogen synthase |
| C. |
Aldose reductase |
| D. |
Lactose synthase |
| E. |
UDP-glucuronyltransferase |
| 9. Which of the following hormones exerts its effects on glycogen synthesis? |
| A. |
Insulin |
| B. |
Glucagon |
| C. |
Epinephrine |
| D. |
Cortisol |
| E. |
Secretin |
Source:
OpenStax, Biochemistry exercises. OpenStax CNX. Apr 06, 2016 Download for free at https://legacy.cnx.org/content/col11386/1.4
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