Biology SBI3A0
June Final Exam 1997

MULTIPLE CHOICE - Choose the best answer from each question and put the letter in the appropriate space on the answer sheet.

1. Most people who recover from viral disease do so because: a) viruses cannot multiple in the body b) viruses cannot enter living cells c) viral diseases are treated with antibiotics d) viruses entering the body stimulate antibody production e) viruses are engulfed by red blood cells

2. Which statements about viruses is FALSE? a) viruses can be killed by antibiotics b) viruses are smaller than a bacterium c) viruses can infect bacteria d) viruses can contain DNA or RNA e) viruses can infect plant cells as well as animal cells

3. The differences between artificially acquired active immunity and artificially acquired

passive immunity is: a) one is the result of recovering from a disease and the other is the result of breast feeding b) one is the result of an injection of a vaccine and the other is the result of an injection of a serum c) one causes an immune response and the other does not d) both a) and b) e) both b) and c)

4. Which statement is FALSE? a) antibiotics can be produced from bacteria for use against bacterial infections. b) antiseptics and disinfectants are both used externally c) antiseptics are used to limit growth of bacteria on the skin d) antibodies are the result of an injection of antibiotics to fight infection e) disinfectants are used to eliminate bacteria and viruses from the surfaces of kitchens and bathrooms.

5. Bacteria possess at least one quality that is plant like, namely a: a) cell membrane b) cell wall c) nucleus surrounded by a nuclear membrane d) nucleolus e) none of the above

6. Streptobaccilus bacteria occur as: a) clusters of rod cells b) chains of round cells c) chains of rod cells d) pairs of rod cells e) clusters of round cells

8. Which of the following statements is INCORRECT? a) mutations cannot occur in viruses b) unlike the bacteria, viruses do not contain organelles. c) respiration does not occur within viruses d) viruses do not have independent means of propulsion e) viruses have genes for enzymes, but do not produce enzymes within themselves.

9. The process of digestion: a) prepares the body for using food materials b) separates nutrients for secretion c) prepares body cells for the passage of food materials d) separates ingested food into individual molecules e) prepares the circulatory system for transport of nutrients

10. As an organ in the human digestion system what function does the liver perform? a) to absorb fats from the food that passes through it. b) to break large proteins down into smaller molecules. c) to digest carbohydrates as they flow through the bile duct d) to produce bile that emulsifies fats in the duodenum e) to absorb water, making the contents of the intestines more solid

11. At the time food passes through the pyloric sphincter of the alimentary canal, a) bile secreted by the liver has emulsified the fats b) proteins have been digested to amino acids and/or shorter peptide chains c) the mixture is neutral d) pepsin has not yet been activated e) none of the above

12. Of the following, the best source of essential amino acids is: a) fish b) bread c) apples d) butter e) green beans

13. Which one of the following is an energy-rich carbohydrate stored in large quantities in the liver cells? a) ATP b) glycogen c) protein d) sucrose e) cellulose

14. If the pancreatic duct of a human became blocked so that pancreatic juices did not flow, which one of the following symptoms would the person show? a) increased bile in the blood b) increased insulin in the blood c) increased carbohydrate absorption d) decreased protein digestion e) decreased fat absorption

15. An enzyme is a complex a) carbohydrate b) fatty acid c) protein d) inorganic compound e) phospholipid

16. In the human digestive system, carbohydrates are digested as indicated below.

enzyme I enzyme 2

STARCH ------------- MALTOSE -------------- GLUCOSE

Which one of the following correctly identifies the enzymes involved in this process"

a) amylase, lipase

b) lipase, proteins

c) maltase, peptidase

d) lipase, peptidase

e) amylase, maltase

17. Which one of the following terms describes the amount of air breathed in during a normal breath? a) inspiratory reserve volume b) expiratory reserve volume c) tidal volume d) vital capacity e) residual volume

18. During inhalation the following occurs: a) the diaphragm relaxes and moves upward b) the rib cage muscles move inward c) the chest cavity volume is reduced d) air pressure is high in the lungs e) none of the above

19. What is the process by which gases in the aveloli are exchanged with gases leaving the blood vessels through the membranes? a) osmosis b) absorption c) filtration d) diffusion e) active transport

20. Which one of the following allows the lungs to move freely and without friction between the inner walls of the thorax? a) moisture in inhaled air b) pulmonary blood supply c) fluid within the pleura d) mucus within the bronchioles e) all of the above

21. After vigorous exercise, which blood vessel contains the highest level of carbon a) pulmonary vein b) vena cava c) aorta d) carotid artery e) renal artery

22. Suppose a person with Type B blood needs a blood transfusion; this person could be give blood that is: a) type B only b) type B or type AB c) type B or type 0 d)type 0 only e) type B, AB, or 0

23. Oxygenated blood enters the heart in the a) right atrium b) left ventricle c) left atrium d) pulmonary artery e) right ventricle

24. The blood pressure during the time the ventricles are emptying/contracting is called a) systolic b) systemic c) pulmonic d) diastolic e) dialysis

25. The 'lub' of the 'lub dub' sound heard when listening to the heart is caused by: a) the opening of the bicuspid and tricuspid valves b) the closing of the bicuspid and tricuspid valves c) the opening of the semilunar valves d) the closing of the semilunar valves e) none of the above

PART B: DIAGRAMS

Digestion System- Refer to the diagram below of the digestive system and place the appropriate name of the organ beside each description. (3 marks)

______________________stores bile

______________________neutralizes gastric juices

______________________closes off the opening of the trachea

______________________produces bile salts

______________________site of water absorption

______________________site for initial carbohydrate chemical digestion

Respiratory System - Refer to the diagram of the gas exchange system and place the appropriate name beside each description. ( 3 marks)

______________________location of gas exchange

______________________provides support to the trachea

______________________warms and moistens the air

______________________prevents food from entering trachea

______________________small passageway for the air

______________________divides into the bronchi

Transport System - Refer to the diagram of the circulatory diagram to answer the following questions. (6 marks)

i) Identify the labeled parts: (1.5 marks)

A.___________________(vessel)

B.____________________(vessel)

C.___________________(valve)

iii) Place arrows on the diagram indicating the direction of flow in the blood vessels. of this circulatory diagram.(1 mark)

iv) The thickest chamber of the heart is (.5 marks)

v) The order of blood flow through the heart is ......

PART C: RESTRICTED RESPONSE - Put the answer to the following questions in the space provided on the examination paper.

rate. (3 marks)

b) Which student made the quicker recovery from exercise and is therefore probably

the athlete? Explain 2 physiological reasons why his/her body has acquired advantages

over the other student through regular exercise assuming they are the same size, age, and

sex. (3 marks)

3. An investigation was performed to determine the effect different chemical agents,

such as, disinfectants and antiseptics have on bacterial growth. Study the results in the

chart below and answer the following questions. BE SPECIFIC in your answers.

Table 1. Effect of different Chemical Agents on the Growth of B. subtilis

a) What is the purpose of the control? (I mark)

b) Of the chemical agents used in the investigation, which appears to control

bacterial growth the best? WHY? ( 2 marks)

growth? Explain. (2 marks)

d) Would using a different type of bacteria influence the effectiveness of the

chemical agents? Explain. (2 marks)

PART D: SHORT ANSWER QUESTIONS - Answer the following questions on the foo1scap provided. Answer in COMPLETE SENTENCE and remember to BE SPECIFIC in your response.

1. Fully compare and contrast 4 of the following choices. ( 8 marks) a) prokaryotic cell and virus b) antiseptics and antibiotics c) trachea and esophagus d) arteries and capillaries e) mechanical and chemical digestion

2. A great twentieth century architect, Frank Lloyd Wright, in discussing his success, said he followed the rule of nature, "Structure follows function. "Explain 4 features of the structure/design of ONE of the following organs which helps it perform its function: heart, small intestine, lungs and explain how the rule applies.(4 marks)

3. Choose ONE disease studied this semester and describe how the overall system is affected by this disease and the consequences. ( 4 marks)

4. Why would students who jiggle their feet be more alert and perform better on long exams that their peers who sit perfectly still? (3 marks)

5. Describe the route taken including the events along the way for a molecule of carbon dioxide to travel from a body cell to the outside air. ( 4 marks)

6. An HIV virus enters a cell in your body. Explain why you may eventually die from a disease like influenza, something your body can normally fight off. (3 marks)

7. You have just eaten a plate of French fries and a Coke. Discuss the process of movement through your digestive system, identify where chemical and/or mechanical digestion occurs as well as, absorption. ( 6 marks)

PART E: ESSAY QUESTION - FULLY answer ONE of the following questions in a well organized essay. ( 10 marks)

A) The survival of a multicellular organism depends upon the interrelationship of its body systems. During this course you have studied cells and the digestive, circulatory, respiratory and immune systems. Explain in detail how each system depends upon the other to survive.

OR

B) It is the year 2060. You live in the town of Microborough. The town has been specifically

designed to prevent the spread of microorganisms. With specific reference to terminology and

concepts covered in class, describe 5 different ways the town and/or your lifestyle has been altered to

accomplish this goal.

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