Nutrition discussion questions

<p><strong><strong>1. A sample of blood from the hepatic portal vein contains<br />
A. fats    B. proteins    C. high concentration of urea.   D. high concentration of products ofdigestion.<br />
2. What are the products of digestion of lactose sugar?<br />
A. Glucose only  B. Glucose and galactose  C. Fructose and galactose   D. Fructose and glucose<br />
3. Which one of the following organisms carriers out intracellular digestion?<br />
A. Fungi  B. Algae  C. Amoeba  D. Hookworm<br />
4. The role of rennin in children during digestion is<br />
A. Breaking down milk protein into peptides.<br />
B. mixing the milk protein with digestive enzyme.<br />
C. activating pepsin to digest the milk protein.<br />
D. coagulating milk protein.<br />
5. Which one of the following pairs of organs is important in the digestion of fats?<br />
A. Stomach and liver  B. Pancreas and stomach    C. Liver and pancreas   D. Stomach and mouth<br />
6. Which of the following are the end products of the digestion one cane sugar?<br />
A. Glucose and fructose  B. Glycerol and fructose  C. Fructose and galactose   D. Galactose and glucose</p>
<p>7. Which one of the following statements is true about the digestion in man?<br />
A. Digestion of sucrose starts in the stomach.<br />
B. Digestion of sucrose starts in the ileum.<br />
C. Sucrose is digested to glucose in the ileum.<br />
D. Sucrose is converted to glucose and galactose. </p>
<p>8. Which one of the following statements is true about the digestion in man?<br />
A. Digestion of sucrose starts in the stomach.<br />
B. Digestion of sucrose starts in the ileum.<br />
C. Sucrose is digested to glucose in the ileum.<br />
D. Sucrose is converted to glucose and galactose.<br />
9. Blockage of the bile duct would impair the digestion of<br />
A. proteins    B. cellulose.  C. Starch   D. Fats<br />
10. The saprophytic and holozoic modes of feeding are similar because both<br />
A. do not feed on cellulose.<br />
B. do not require chloroplasts.<br />
C. utilize enzymes to break down complex food substances.<br />
D. feed only on dead organic matter.<br />
11. Intestinal parasites are not digested by the host‟s enzymes because of<br />
A. possession of attachment devices.<br />
B. Secretion of large quantities of mucus.<br />
C. Having a high rate of reproduction.<br />
D. Lack of their own digestive system.<br />
12. The similarity in feeding between n amoeba and the fungus mucour is that both<br />
A. Feed on dead organic matter only.<br />
B. Ingest undigested food materials.<br />
C. Digest their food within vacuoles.<br />
D. Secrete enzymes onto food materials from their cytoplasm.<br />
13. Enzymes are said to be specific in nature because they „<br />
A. are proteins.  B. act in a particular pH medium.  C. act on one kind of substrate.<br />
D. remain unchanged at the end of the reaction.<br />
14. Which one of the following food substances are not changed by the gut enzymes?<br />
A. Lipids and vitamins   B. Minerals and vitamins<br />
C. Minerals and disaccharides.  D. Lipids and lactose.<br />
15. Enzymes differ from catalyses because enzymes<br />
A. are required in small amounts.  B. respond to temperature changes.<br />
C. are protein in nature.  D. speed up reactions.</p>
<p>16. It is known that a lactating mother may suffer from the weakening of teeth and bones. Which vitamin and minerals would she need to correct this condition?<br />
A. Vitamin K, iodine and phosphorus.  B. Vitamin C, phosphorus and calcium<br />
C. Vitamin A , Calcium and Iron.   D. Vitamin D, phosphorous and calcium.<br />
17. The milk teeth in humans consist of<br />
A. incisors only.   B. incisors and canines.<br />
C. incisor, canines and premolars.   D. incisors and premolars.<br />
18. The living together of a fungus and an algae as a lichen is called<br />
A. symbiosis    B. parasitism   C. saprophitism   D. commensalisms<br />
19. What relationships exists between a groundnut plant and nitrogen fixing<br />
A. Parasitism  B. Saprophytism  C. Naturalism  D. Symbiosis<br />
20. Bacteria that often live in their hosts where both partners cannot survive without the other are called<br />
A. parasites   B. symbiosis    C. commensals.   D. saprophytes</p>
<p>21.     (a) What is an enzyme?<br />
(b) Give any three enzymes that conform to the above system and the substrates and products in each.<br />
Enzyme    Substrate (food acted up on)    Products<br />
i.<br />
ii.<br />
iii.<br />
iv.<br />
v.            </p>
<p>(c) State three factors which affect enzyme action.<br />
(d) Give three characteristics of enzymes.<br />
(e) Describe an experiment to show that enzyme activity is affected by temperature.<br />
22. (a) The optimum PH for enzyme X is 2.00 and for enzyme Y is 9.00. Suggest the name of the enzymes X and Y, and name the parts of the alimentary canal where you would expect to find each enzyme, food substrate it acts on and the product.<br />
Name of enzyme    Part of alimentary canal the enzyme is found.    Food substrate    Product<br />
X<br />
Y<br />
b) State three enzymes contained in the pancreatic juice, the food substance acted on by each enzyme and the product formed in each case<br />
Enzyme    Food acted upon    Product formed<br />
I.<br />
II.<br />
III.            </p>
<p>a)    State the contents of bile secretion in the liver.<br />
b)    Explain the digestive functions of the bile contents.</p>
<p>22. (a) Giving two examples in each case. Explain what you understand by the terms.<br />
(i) parasitism.<br />
(ii) Symbiosis.<br />
(iii) Commensalism<br />
(b) How are parasites adapted to their mode of life?<br />
23. a) using diagrams describe the life cycle of a tapeworm<br />
b) Describe how a tapeworm is adapted to its mode of life.<br />
c) What are the dangers of parasitic mode of life?<br />
24. a) Describe the nitrogen cycle and suggest the role played by.<br />
I.    Micro organisms<br />
II.    Plants<br />
b)    Show how nitrogen is lost and gained from the soil.<br />
c)    What is the importance of the nitrogen cycle to the life of an animal<br />
25. Write short notes about the following, giving an example in each case<br />
a)    Monosaccharide.<br />
b)    Disaccharides<br />
c)    Polysaccharides<br />
26. (a) Describe what happens to a meal of posho and beans after ingestion<br />
27. (a) Describe the process of digestion in the duodenum<br />
(b) How is the villus adapted to its function of absorption?<br />
(c) Describe what happens to the food after absorption<br />


3 responses to “Nutrition discussion questions

  1. its very difficult for me to understand this……its little bit too much complicated

  2. since I’ve got these notes, I’ve already passed

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