0708BI12 Form A - Weeblymrschmittbiology12.weebly.com/uploads/2/4/6/8/24685288/0708bi_p.pdf · ... For each question select the best answer and record your ... Which of the following

Contents: 28 pages Examination: 2 hours 67 multiple-choice questions in the Examination Booklet Additional Time Permitted: 60 minutes © Province of British Columbia

Biology 12 Examination Booklet

August 2007 Form A

DO NOT OPEN ANY EXAMINATION MATERIALS UNTIL INSTRUCTED TO DO SO.

FOR FURTHER INSTRUCTIONS REFER TO THE RESPONSE BOOKLET.

Biology 12 – 0708 Form A Page 1

PART A: MULTIPLE CHOICE Value: 67 marks

Suggested Time: 80 minutes

INSTRUCTIONS: For each question select the best answer and record your choice on the Answer Sheet provided. Using an HB pencil, completely fill in the bubble on the Answer Sheet that has the letter corresponding to your answer.

You have Examination Booklet Form A. In the box above #1 on your Answer Sheet, fill in

the bubble as follows.

FA B C D E HGExam Booklet Form/Cahier d’examen

1. Which of the following are found in lysosomes? A. ATP B. RNA C. enzymes D. glycogen 2. What organelle functions with the endoplasmic reticulum during protein production? A. the ribosome B. the lysosome C. the chloroplast D. the cell membrane

Page 2 Biology 12 – 0708 Form A

Use the following diagram to answer question 3.

W

X

YZ

3. Where are drugs detoxified in liver cells? A. W B. X C. Y D. Z


X

Z

Y

W

4. Which organelle contains the information necessary to produce enzymes? A. W B. X C. Y D. Z


5. Which of the following molecules, when added to water, will produce a solution with the lowest pH?

A. cellulose B. neutral fat C. nucleic acid D. monosaccharide

Use the following graph to answer question 6.

3

4

5

6

7

pH

TTime

W

XY

Z

8

6. At time T, a small amount of dilute acid is added to a solution buffered to pH 5.0. Which line on the graph illustrates the change in pH of the solution following the addition of the weak acid?

A. W B. X C. Y D. Z

________________________________________________ 7. Which of the following equations illustrates a synthesis reaction? A. acid + base salt + water B. ATP ADP + P + energy C. protein+ water amino acids D. glucose + glucose maltose + water


8. Which of the following molecules insulates the body from heat loss? A.

N C C

O

NC

O

C

H

C

OHR

O

H

H R R H

B. C

C

C

O

O

C

H

H

C C C C H

H H H H

HH

C

H

H

C C C C H

H H H H

HH

C

H

H

O

C C C H

H H H

HHH

C

H

H

CH

H

O

OCH

OCH

H C.

O

CH3

CH3

OH

D.

O

CH2

O O O

O O O O

O

CH2

O O

O OO

O

CH2

O

CH2

OO O

O O OO

O

O O OO

OO

OO

O

________________________________________________ 9. The graph shows the relative number of atoms in a molecule.

Relativenumber

of atoms in a molecule

Type of atomO H C N

0

1

2

3

P

Which of the following molecules reflects the data shown by the graph? A. ATP B. DNA C. ribose D. hemoglobin


10. Which of the following molecules is stored in the liver and broken down when the body needs energy?

A. starch B. maltose C. cellulose D. glycogen 11. What type of molecule is hemoglobin? A. a steroid B. a protein C. a nucleic acid D. a carbohydrate


S

S

S

S

S

S

X YP

P

P

P

P

P

12. X and Y could represent which of the following? A. adenine and uracil B. guanine and cytosine C. cytosine and adenine D. thymine and thymine


13. Which of the following is a difference between RNA and DNA? A. the number of strands B. the presence of adenine C. the presence of guanine D. the presence of a five-carbon sugar


14. Which of the following correctly describes this process? A. Translation is occurring in the nucleus. B. Replication is occurring in the nucleus. C. Transcription is occurring in the nucleus. D. Translation is occurring in the cytoplasm.

________________________________________________ 15. The sequence of bases in a portion of a DNA molecule is C C G T A C. Which of the following

represents the sequence of bases in the corresponding codons? A. C C G T A C B. C C G U A C C. G G C A T G D. G G C A U G



G A A

X 16. Which DNA base sequence corresponds to the sequence of bases at X? A. C T T B. C U U C. G A A D. G U U

________________________________________________ 17. Which of the following molecules is produced during translation? A. DNA B. tRNA C. protein D. mRNA


Use the following chart to answer question 18.

Three-letter codons of messenger RNA and the amino acids specified by the codons

AAUAAC

AAAAAG

Asparagine

Lysine

CAUCAC

CAACAG

Histidine

Glutamine

GAUGAC

GAAGAG

Aspartic acid

Glutamate

UAUUAC

UAAUAG

Tyrosine

Stop

AGUAGC

AGAAGG

Serine

Arginine

UGUUGC

UGAUGG

Cysteine

StopTryptophan

AUUAUCAUA

AUG

Isoleucine

Methionine

UUUUUC

UUAUUG

Phenylalanine

Leucine

ACUACCACAACG

Threonine

CCUCCCCCACCG

Proline

GCUGCCGCAGCG

Alanine

UCUUCCUCAUCG

Serine

CGUCGCCGACGG

Arginine

GGUGGCGGAGGG

Glycine

CUUCUCCUACUG

Leucine

GUUGUCGUAGUG

Valine

18. Which of the following correctly matches the amino acid, codon and anticodon?

Amino acid Codon Anticodon

A. alanine G C C C G G

B. proline G G C C C G

C. isoleucine T A T A U A

D. asparagine A A C T T G

________________________________________________

19. By which of the following processes do oxygen and carbon dioxide move across

the membranes of the alveoli? A. osmosis B. diffusion C. pinocytosis D. active transport



W

X

Y

Z 20. Which structure can act as a glucose carrier? A. W B. X C. Y D. Z

________________________________________________ 21. What is the process by which the sodium-potassium pump moves ions across

the cell membrane? A. osmosis B. diffusion C. active transport D. facilitated transport



Time

X

22. What is the process shown in the diagram if X contains polypeptide molecules? A. exocytosis B. pinocytosis C. phagocytosis D. facilitated transport

________________________________________________ 23. A 0.9% solution of sodium chloride is isotonic to red blood cells. Which of the following

will result when the cells are placed in a 0.3% solution of NaCl? A. Water will move into the cells causing lysis. B. Water will move out of the cells causing lysis. C. Water will move into the cells causing crenation. D. Water will move out of the cells causing crenation.



Membrane

5%10%

Time 1 hour?

24. In an experiment, the bottom of a thistle tube is covered with a membrane permeable only to

water. The thistle tube is filled with a 10% sucrose solution and placed in a beaker containing a 5% sucrose solution. What will happen to the solution in the tube after one hour?

A. The concentration of sucrose will decrease and become isotonic to the solution

in the beaker. B. The concentration of sucrose will increase and become isotonic to the solution

in the beaker. C. The concentration of sucrose will decrease and become hypotonic to the solution

in the beaker. D. The concentration of sucrose will increase and become hypotonic to the solution

in the beaker.

________________________________________________

25. How do enzymes increase the rate of a chemical reaction? A. They denature the substrate. B. They decrease the energy of activation. C. They increase the substrate concentration. D. They donate atoms or ions to the reactants.


Use the following graph to answer question 26.

Progress of reaction

Potential energy

X

Z

Y

W

26. Which line indicates the change in potential energy in a reaction when no enzyme is available? A. W B. X C. Y D. Z

________________________________________________ 27. The activation energy required to initiate a metabolic reaction may be increased by the addition of A. heat. B. a substrate. C. an enzyme. D. an inhibitor.


Use the following diagram to answer questions 28 and 29.

+Z

Y

X

⎫

⎬

⎪⎪

⎭

⎪⎪

28. If X is a carbohydrate, what are Y and Z? A. nucleotides B. amino acids C. glucose and maltose D. fatty acid and glycerol

29. Which of the following is X? A. a product B. a reactant C. an enzyme D. an enzyme-substrate complex

________________________________________________ 30. Where does the emulsification of fat occur? A. the liver B. the colon C. the gall bladder D. the small intestine



X

Y

31. What is a difference between the contents in this structure at X and at Y? A. There is more bile at X than Y. B. There is less lipase at X than Y. C. There is more water at X than Y. D. There is less protein at X than Y.

________________________________________________ 32. What organ produces pepsinogen? A. the liver B. the stomach C. the pancreas D. the duodenum 33. Which of the following correctly matches a digestive enzyme and the pH it requires

to function at an optimum rate?

Enzyme pH

A. bile acidic

B. pepsin basic

C. trypsin basic

D. nuclease acidic



ZW

X

Y

34. Which indicated structure secretes a hormone which causes increased production of glycogen? A. W B. X C. Y D. Z


35. Where could the structure shown above be located? A. in the aorta B. in a lymph vein C. in a renal capillary D. in an umbilical artery



X

Z

WY

36. Which arrow indicates the subclavian artery? A. W B. X C. Y D. Z 37. At which point would the highest blood pressure be measured? A. W B. X C. Y D. Z



X

38. Which of the following best describes the structure labelled X? A. a vein which carries blood rich in glucose B. a vein which carries oxygenated blood to the heart C. an arteriole which carries blood to the small intestine D. an artery which carries nutrients to the rest of the body

________________________________________________ 39. In which structure does blood contain the greatest concentration of oxyhemoglobin? A. the aorta B. the right atrium C. the pulmonary artery D. the anterior vena cava



Y

Z

W

X

40. Which of the indicated blood components contains reduced hemoglobin (HHb)? A. W B. X C. Y D. Z 41. Which of the indicated blood components initiates blood clotting? A. W B. X C. Y D. Z

________________________________________________ 42. Where are the chordae tendineae found? A. in the atria B. in the ventricles C. in the coronary arteries D. in the semilunar valves


43. A person’s blood pressure reading is measured at 150/80. Which of the following is greater than normal?

A. systolic pressure B. diameter of veins C. diastolic pressure D. capillary diameter 44. Rings of cartilage surround which of the following structures? A. the alveoli B. the bronchi C. the pharynx D. the bronchioles 45. What structure is lined with cilia? A. the trachea B. the pharynx C. the epiglottis D. the pleural membranes 46. What structures increase the surface area in the lungs? A. the villi B. the alveoli C. the bronchi D. the pleural membranes 47. Which of the following causes a drop in the air pressure within the thoracic cavity? A. The rib cage moves up and out. B. Air moves into the thoracic cavity. C. The diaphragm becomes dome shaped. D. The medulla oblongata sends fewer nerve impulses.


Use the following diagram of alveoli to answer questions 48 and 49.

X

Y

48. What is a characteristic of the blood in vessel Y if it is carrying blood toward X? A. The concentration of oxyhemoglobin is high. B. The concentration of bicarbonate ions is high. C. The concentration of reduced hemoglobin is low. D. The concentration of carbaminohemoglobin is low. 49. Which of the following is a characteristic that aids in the function of structure X? A. They have lipoproteins to prevent collapse. B. They have cilia and mucus to remove debris. C. They have a two or three cell layer thickness to provide strength. D. They have a low surface-area-to-volume ratio to allow for quick exchange of gases.

________________________________________________ 50. How does the body respond to increased concentration of carbon dioxide

in the blood? A. Activity in the medulla oblongata decreases. B. Rate of contraction of the rib muscles increases. C. Number of impulses sent to the diaphragm decreases. D. Secretion of hormones from the hypothalamus increases.



51. What is the structure shown in the diagram? A. a reflex arc B. a motor neuron C. a sensory neuron D. a synaptic ending

________________________________________________ 52. What structure conducts nerve impulses from the spinal cord to the gall bladder? A. an effector B. an interneuron C. a motor neuron D. a sensory neuron


Use the following graph to answer questions 53 and 54.

Membrane potential(millivolts)

Time

–65

0

+40

membrane potential(millivolts)

Membrane potential vs. Time

X Y Z

53. What describes the characteristics of a neuron from time period X to Y? A. The sodium gates are open. B. The outside of the neuron becomes positively charged. C. The sodium-potassium pump moves potassium ions to the outside. D. The concentration of potassium ions outside the axoplasm is higher than inside. 54. What results if the potassium gates do not open during time Y to Z? A. Repolarization does not occur. B. The frequency of action potentials increases. C. The sodium-potassium pump does not function. D. The contractile proteins pull the vesicles to the membrane.

________________________________________________ 55. Which of the following occurs first when neurotransmitters bind to receptor sites on the

postsynaptic membrane? A. Potassium ions diffuse out of the axon. B. Sodium ions diffuse into the axoplasm. C. Potassium ions are pumped out of the axoplasm. D. Membrane potential changes from +40 mV to –65 mV.



Z

⎧⎨⎩

X

Y

W

56. To where does the nerve impulse travel after it leaves the axon of the motor neuron? A. W B. X C. Y D. Z

Use the following diagram of the brain to answer question 57.

X

57. What is structure X? A. the thalamus B. the cerebellum C. the hypothalamus D. the corpus callosum


58. Which structure does urine enter after leaving the collecting duct? A. the ureter B. the urethra C. the renal pelvis D. the renal medulla


XY

Z

W 59. What area represents the renal medulla? A. W B. X C. Y D. Z


Use the following diagram of a nephron to answer questions 60 and 61.

V

Z

XY

W

60. What occurs at structure W? A. Less water is reabsorbed when ADH is secreted. B. Materials are forced into the tubule by pressure filtration. C. Substances are actively transported from the blood to the filtrate. D. Materials are reabsorbed from the filtrate into the peritubular capillary network. 61. Where does the filtrate have the highest concentration of amino acids? A. V B. X C. Y D. Z


62. Which of the following conditions results in fewer hydrogen ions being excreted into the urine?

A. increased blood pH B. decreased blood pH C. secretion of aldosterone D. secretion of antidiuretic hormone (ADH) 63. Fertilization usually takes place in the A. ovary. B. uterus. C. cervix. D. oviducts. 64. Which phase occurs on days 15–28 of the uterine cycle? A. the luteal phase B. the follicular phase C. the secretory phase D. the proliferative phase


65. Which of the following occurs as a result of a sudden increase in the concentration of luteinizing hormone (LH) in the blood?

A. ovulation B. a follicle begins to develop C. the endometrium begins to disintegrate D. the corpus luteum begins to break down


W

Y

X

Z

66. The stimulation of which structure results in the release of oxytocin during childbirth? A. W B. X C. Y D. Z


Use the following diagram of an ovary to answer question 67.

W

Y

Z

X

Time

67. Which structure is maintained by the secretion of human chorionic gonadotropin (HCG)? A. W B. X C. Y D. Z You have Examination Booklet Form A. In the box above #1 on your Answer Sheet,

ensure you filled in the bubble as follows.

FA B C D E HGExam Booklet Form/Cahier d’examen

This is the end of the multiple-choice section. Answer the written-response questions in the Response Booklet.

Version 0708.1

D E F G HA B CExam Booklet Form/Cahier d examen,

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Student Instructions

1. PlaceyourPersonalEducationNumber(PEN)labelatthetopofthisBookletANDfillinthebubble(FormA,B,C,D,E,F,GorH)thatcorrespondstotheletteronyourExaminationBooklet.

2. UseapenciltofillinbubbleswhenansweringquestionsonyourAnswerSheet.

3. Useablue-orblack-inkpenwhenansweringwritten-responsequestionsinthisBooklet.

4. ReadtheExaminationRulesonthebackofthisBooklet.

Course Code = BI 12

Biology 12AUGUST 2007

Response Booklet

Course Code = BI

AUGUST 2007

MINISTRY USE ONLYMINISTRY USE ONLY

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MINISTRY USE ONLY

Examination Rules

1.Thetimeallottedforthisexaminationistwohours.Youmay,however,takeupto60minutesofadditionaltimetofinish.

2.AnswersenteredintheExaminationBookletwillnotbemarked.

3.Cheatingonanexaminationwillresultinamarkofzero.TheMinistryofEducationconsiderscheatingtohaveoccurredifstudentsbreakanyofthefollowingrules:

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Course Code = BI 12


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Course Code = BI

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Biology 12 – 0708 Response Booklet Page 1

PART B: WRITTEN RESPONSE

Value: 23 marks Suggested Time: 40 minutes

INSTRUCTIONS: 1. Answer the following questions in the space provided in this Response Booklet.

2. Use a pen for this part of the examination unless otherwise instructed.

3. You may not need all of the space provided to answer each question.

1. (3 marks)

Describe the steps involved when a DNA molecule is copied.

Page 2 Biology 12 – 0708 Response Booklet

2. (4 marks)

Compare the chemical composition of the contents of the stomach one hour after eating a meal containing proteins, carbohydrates and fats, to the contents of the small intestine several hours later.


Use the following diagram of blood and tissue cells in the placenta to answer question 3.

X Y To umbilical veinFrom umbilical artery

3. (4 marks)

Describe the differences in the chemical composition of the blood as it moves from X to Y.


4. (3 marks)

Describe and explain the effect an absence of calcium ions would have on the transmission of an action potential.


5. (4 marks)

Explain why excessive aldosterone secretion leads to edema, a condition that results in the swelling of tissues due to retention of fluids.


6. (5 marks)

Compare the effects of hormones secreted by the anterior pituitary on the male and female reproductive systems.

END OF EXAMINATION

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0708BI12 Form A - Weeblymrschmittbiology12.weebly.com/uploads/2/4/6/8/24685288/0708bi_p.pdf · ... For each question select the best answer and record your ... Which of the following