On the answer sheet, PRINT THE COMPLETE NAME OF YOUR SCHOOL, THE SCHOOL NUMBER, AND YOUR NAMES.

You will move from station to station and you will have 3.0 minutes at each station. 15 stations including two rest stops. Do not move to the next station until told to do so. Fill in the space on the answer sheet that corresponds to your answer. USE CAPITAL LETTERS FOR ANSWERS. LOWER CASE LETTERS WILL BE COUNTED WRONG!!!!!! There are 86 questions, spread out over 15 stations. All questions are worth one point except where indicated.

Only non graphing/ non-programmable calculators will are allowed. No reference material is allowed.

Complete school name________________________________________

School number_______________________________________

Student names____________________________________
 

1___B____ 22____C      43_C____(2) 64___F__
2____A___ 23_____D    44___D__(2) 65___C__
3_____B (2) 24___ _C   45__B___     66_____B
4_____B__ 25_D_____ 46___C__     67_____B
5____A___ 26__A____ 47__D___    68_____B
6_____A__ 27___E___ 48__D___    69_A____(2)
7_C______ 28____B__ 49___B__    70__B___(2)
8__B_____ 29_F_____ 50_C____    71___B__(2)
9___D____ 30__B____ 51__D___   72____C_
10___A___ 31___D___ 52___A__   73_A____
11____B__ 32_____C_ 53_A____   74___A__
12_____C_ 33____B    54_A____   75____B_(2)
13A______ 34A______ 55__C___  76_C____(2)
14_B_____ 35__B____ 56_D____  77___C__(2)
15__E____ 36___A___ 57__C___  78_____B
16___B___ 37____B__ 58___A__  79___A__
17____C__ 38_____B_ 59__B___  80  B_____
18_____A_ 39___B___ 60__C___ 81_D____(2)
19_B OR C 40__D____(2) 61_D__82C_____
20_B_____ 41__C____ 62_A____ 83____A_
21__A____ 42___D___ 63__E___ 84____C_
                                                        85_____C
                                                        86_____A

total score___________  place______

station A  q 1-6
1-3 Pertain to this information

Newly fertilized sea urchin eggs were incubated in radioactive thymidine for 30 minutes. At the end of this time, the embryos are collected, exposed to photographic emulsion, and then examined with a light microscope. Twenty-five (25% of the cells have darkened areas over the nucleus.

1. Radioactive thymidine is used to determine if the cells were synthesizing

A. Membranes
B. DNA
C. RNA
D. Protein

2. If radioactive phospholipids had been used instead of thymidine,  where would most of the label be expected to appear?
A. Cell Membranes
B. Nucleus
C. Ribosomes
D. Microtubules

3. If the cell cycle of the sea urchin is 10 hrs long, what is the approximate length of the S phase? (2)

A. 110 minutes
B. 150 minutes
C. 200 minutes
D. 300 minutes
 

4-6. In an experiment using developing sea urchin eggs, the amount of cyclin is measured every 30 minutes for 16 hours.

4. What is the  dependent variable?
A. time after the start of the experiment
B. amount of cyclin present
C. total number of cell divisions
D. number of cells present

5. What is the independent variable?

A. time after the start of the experiment
B. amount of cyclin present
C. total number of cell divisions
D.  number of cells present

6. What might be an appropriate control for the above experiment?
A. Cells that do not divide
B.  Cells at the start of mitosis
C. Fast growing cancer cells
D. Slow growing cancer cells

STATION B Q7-19
7-10
Match the organelle with its function

7______ mitochondria   A. Movement of chromosomes during meiosis

8._____chloroplast    B. Production of ATP and glucose

9._____rough endoplasmic reticulum  C.  Production of ATP, CO2

10._____microtubules    D. Production of proteins for export
 

11-15 Identify the following organelles (pictures of cells with organelles--use any text book)

11.__________    A. Mitochondrion

12.__________    B. Golgi complex or Golgi body

13._________     C. Nucleus

14.________      D. Ribosome

15.________     E. Cilia

16-19 Answer each question with the letter of the picture of the cell.

16. Which cell (A, B, C) will be actively secreting proteins?______ (liver or pancreas cell)

17. Which cell (A, B, C) is likely to be photosynthetic?______(picture of algal cell with chloroplast)

18. Which cell (A, B, C )is likely to be able to contract?______ (picture of skeletal muscle)

19. Which cell (A, B, C) is most likely to be motile? ________ (protozoan with flagella)
 
 
 
 
 
 

STATION C  Q 20-29
20-23 For the following flow chart, provide the letter or letters of molecules that are represented by each number. Answers may be used more than once.
 

     Does the compound contain nitrogen?

   Yes       No

 Does compound contain phosphorous?   Does the compound have more H than O?

yes    No                                       Yes                                No

20____   21_____   22____  23.____

A. Protein   B. Nucleic acid
C. Fatty acid/fat  D. Carbohydrate

24-29. Identify each of the following biological building blocks.( Pictures of various molecules from a book)

24_______      A. fatty acid

25._______      B. amino acid

26._______      C. nucleotide

27._______      D. simple sugar (monosaccharide)

                         E. Glycerol
28. ________

29. _______      F. Steroid
 

station d q 30-37
30. Which of the following formulas is not correct based on bonding rules?

A. CH4
B. C2H5O
C. C2H6O
D. C2H6O2

31-34 Match the building block with the correct polymer

31______protein    A. glycerol
                               B. nucleotide
32.______polysaccharide   C. simple sugar
                                           D. amino acid
33.______nucleic acid

34. _____fat
 
 

35-37. The skin cells of an organism have 42 chromosomes. How many chromosomes would you expect to see in

35. Liver cells________     A. 21
                                           B. 42
36. Sperm cells_______     C. 63
                                           D. 94
37. Nerve cells________
 
 
 
 

STATION E Q 38-42
.
38. What process is indicated by the following figure?

A. Mitosis
B. Meiosis I
C. Meiosis II
D. Either Meiosis I or Meiosis II

39. An organism has the following chromosome composition: AA’, BB’, CC’, where the ‘ represents paternal chromosomes. Which of the following combinations in gametes is very unlikely?

A. A’BC
B. ABB’
C. ABC’
D. A’B’C

40 An organism has a diploid number  of 8. How many different chromosomal combinations are possible in gametes? (2)
A. 4
B. 8
C. 12
D. 16

41.  Refer to the following stages of mitosis in the figure to the right. What sequence of cells represents the chronological sequence of events that occur during mitosis?

A.   A, B, C, D
B.    A, C, B, D
C.   B, A D, C
D.   B, C, D, A

42. If the amount of DNA in a sperm cell is given the relative number of 1, what is the amount of DNA in a cell in G2 before mitosis?
A. 1
B. 2
C. 3
D. 4
 

station f  q 43-48
43, 44 refer to the following information. Cells of an onion root tip were examined and the following cells in various stages were reported.

Interphase 19
Prophase  10
Metaphase 4
Anaphase 2
Telophase 1
Total   36

43 .What approximate % of cells is not dividing? (2)
A. 35
B. 45
C. 55
D. 65

44. If mitosis in onion cells is 80 minutes long, how long is prophase? (2)
A. 20 min
B. 30 min
C. 40 min
D. 50 min

45. During what stage of the cell cycle is each chromosome composed of 2 chromatids?
A. G1
B. G2
C. S
D. G0

46. What class of enzymes helps most to trigger and control the cell cycle?
A. proteases
B. transferases
C. kinases
D. nucleases

47. One of the earliest events that distinguishes  meiosis occurs in prophase I and involves
A. chromosomal condensation
B. loss of nuclear membrane
C. movement toward a metaphase plate
D. pairing of homologous chromosomes

48. Which of the following is unique to mitosis and not meiosis?
A. homologous chromosomes pair
B. homologous chromosomes exchange information
C. chromatids become separated during anaphase
D.  homologous chromosomes attach to separate spindles
STATION G REST STOP

What do you call a red blood cell that goes trick or treating? Answer below
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

hemogoblin
 

STATION H Q 49-55
49-54
Which piece of equipment would you use to perform the following procedures?

49.  Separate parts of a cell

50. Separate different DNA or protein molecules

51. Identify different internal structures of a cell

52. Estimate the concentration of bacteria in a test tube

53. Determine which test tubes contains chlorophyll

54. Measure the  red product produced by an enzyme?
 
 

55. What color will the compound used for the absorption spectrum appear?

A. red
B. blue
C. green
D. orange
 

Station I q 56-59
56. Solution 1 has a pH of 3 and solution 2 has a pH of 9. Which of the following statements describes the amount of hydrogen ions in the two solutions?

A. Solution 1 has 3 times as many hydrogen ions as solution 2
B. Solution 1 has 6 times as many hydrogen ions as solution 2
C. Solution 1 has 60 times as many hydrogen ions as solution 2
D. Solution 1 has 106 times as many hydrogen ions as solution 2.

57. An organism requires three different enzymes for growth. The graphs below show the effects of pH on the activity of each enzyme. What is the optimal pH for growing this organism?

A. 3
B. 4
C. 5
D. 6

58. Examine the graph below. What is the most serious error that was made in constructing the graph?

A. The dependent and independent variables are plotted on the wrong axes.
B. There is no spacing on the axes.
C. There are no units on the axes.
D. There is no spacing on the axes.

59. What is the total number of molecules produced if the reaction proceeds for 3 seconds? (2)

A. 2400
B. 3600
C. 6000
D. 7200
 
 

STATION J Q-60-
60-64 For each of the following, identify the process that produced the indicated products.

60.   CO2, NADH          A.  Light dependent reactions of photosynthesis
                                       B. Light independent reactions of photosynthesis
61.  ATP, H2O, NAD    C. Krebs cycle
                                       D. Electron transport system
62.  ATP, O2, NADPH    E. Glycolysis
                                       F. Fermentation
63. pyruvate

64. lactic acid

65. A plant is exposed to green light. What is the best explanation of what will happen as a result of exposure to this light?

A. Photosynthesis will occur but at a slower rate than if sunlight were used.
B.  Photosynthesis will occur but at a faster rate than if sunlight were used.
C. Photosynthesis will not occur.
D. Only the light dependent reactions of photosynthesis will occur.

66. Which of the following best explains why a person who eats a lot of sugar ends up making a lot of fat?
A. Sugar is a building block of fat.
B. A sugar metabolite is converted to fat
C. Sugar causes protein to be converted to fat
D. Sugar causes nucleic acids to be converted to fat

67.Examine the following graph. Which curve, A, B, C represents a CAM plant?
 
 
 

Station k q 68-74

68. A DNA molecule is 20% guanine. What per cent of the bases is adenine?

A. 20%
B. 30%
C. 70%
D. 80%

69. An RNA molecule has 480 bases. What is the maximum number of amino acids that could be encoded by this mRNA? (2)

A. 160
B. 320
C. 480
D. 1440

70. The double stranded DNA below represents the beginning of a gene that codes for a protein with at least 11 amino acids. (2)

TAC ATG ATC ATT TCA CGG AAT TTC TAG CAT GTA
ATG TAC TAG TAA AGT GCC TTA AAG ATC GTA CAT

Which strand is made into mRNA, and in which direction is the mRNA read by the ribosome?

A. top strand, message read left to right
B. top strand, message read right to left
C. bottom strand, message read from left to right
D. bottom strand, message read from right to left

71-73
71. Using the genetic code, determine the sequence of amino acids made from the following messenger RNA. (2)
                  *
AUG CCC AAA CAG UGC GAG CUU ACG

A. met-pro-lys-his- cys-glu-leu-thr
B. met-pro-lys-gln- cys-glu-leu-thr
C. ala-phe-glu-arg-asp-lys-pro-val
D. ala-phe-gln-arg-asp-lys-pro-val
 

72. What will be the consequence if the A indicated by * is changed to U?

A. One amino acid will be changed
B. Many amino acids will be changed.
C. The protein will have only 2 amino acids
D. The protein will have only 5 amino acids.

73. What will the consequence be if a C is added just prior to the A*?

A. Many subsequent amino acids will be changed.
B. Only one amino acid will be changed.
C. No amino acids will be changed.
D. The protein will be shorter than normal.

74. Which of the following is true of newly replicated DNA?
A. It will contain one original strand and one newly synthesized strand.
B. It will contain two newly synthesized strands
C. It will contain 2 strands that will each contain original and newly synthesized regions
 
 
 
 

STATION L Q 75-77
75.A mRNA has 21,600 bases. If the rate of translation is 3 amino acids/sec, how long will it take to make a completed protein from all of these bases? (2)
A. 20 min
B. 40 min
C. 60 min
D. 100 min

76-77.The gene for specific protein  is 1.5 x 10*6 base pairs long.

76. If all these bases were used in the coding sequence, approximately how many amino acids could be coded by this gene? (2)

A. 4.5 x 106
B. 1.5 x 106
C. 5  x 105
D. 1 x 105

77. If the rate of transcription is 50 amino acids/sec, approximately how long will it take the cell to this mRNA? (2)

A. 1 hr
B. 5 hr
C. 8.5 hr
D. 12 hr
 
 
 

STATION m Q 78-81
78.Which of the following is true of saturated fats?
A. Some of the possible bonds with hydrogen do not occur.
B. They will produce more energy than an unsaturated fat.
C. They are usually liquid at room temperature.
D. They contain more carbons than unsaturated fats.

79. Which of the following statements is false?
A. People  who are lactose intolerant should drink skim milk
B. Using a drug that temporarily block mitosis will result in cells with double the amount of original chromosomes
C. Plants carry out both photosynthesis and cellular respiration
D. Interfering with RNA synthesis will also interfere with protein synthesis

80.Excess vitamin A causes the rupture of lysosomes. Which of the following might be expected as a symptom of excess vitamin A?
A. Synthesis of new lysosomes
B. Destruction of cells by digestive enzymes
C. Increased rate of protein synthesis
D. Increased rate of cellular respiration

81. Refer to the following graph
What is the per cent change in surface to volume ratio if a cell goes from 1um to 6 um in diameter? (2)
A. 16%
B. 33%
C. 67%
D. 83%

STATION N Q 82-
82. Which of the following is found in prokaryotic but not eukaryotic animal cells?
A. mitochondria
B. chloroplasts
C. cell wall
D. ribosome

83. Yeast cells are placed in a sugar solution. Half of the solution is placed in an anaerobic environment, and the other half is placed on the lab table. Which of the following does not represent an expected observation?
A. Cells on the lab table will consume more sugar per time than those in anaerobic environment.
B. Both tubes will produce CO2
C. Both tubes will have dividing cells

84. Which of the following is an expected product of only the anaerobic cells?
A. pyruvic acid
B. ATP
C. Ethyl alcohol

85. What is the function of p53 in normal cells?
A. Stimulate DNA replication
B. Stimulate cell division
C. Prevent cell division
D. Increase the amount of DNA per chromosome

86.You wish to isolate an enzyme that produces a colored product from mitochondria. What is the correct order  of steps to accomplish this goal?
A. homogenize, centrifuge, electrophorese, use spectrophotometer
B. homogenize, electrophorese, use spectrophotometer, centrifuge
C. electrophorese, use spectrophotometer, homogenize, centrifuge
D. centrifuge, electrophorese, use spectrophotometer,. homogenize
 

STATION 0 REST STOP

A German security agent called police one night when he noticed that the plant had been invaded with dogs and said” The mills are alive with the hounds of Munich.”
 
 
 
 
 

Two sodiums were out walking and one remarked that the other looked sad. The second one remarked that it had just lost an electron. The first said, “Are you sure?”
The second replied, “I’m positive.”
 
 

 A neutron and a proton entered a restaurant, and the neutron asked how much the special was.
The waiter replied, “For you, no charge.”