2009 Senior External Examination in Biology: Paper … · 2009 Senior External Examination Biology Paper One — Question and response book ... Question 3 In an experiment, ...
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• Paper One Part A – Multiple-choice response sheet
• Notepaper
Equipment allowed
• QSA-approved equipment
• non-programmable calculator
Directions
Do not write in this book during perusal time.
Paper One has three parts:
• Part A: Multiple choice
• Part B: Short response
• Part C: Extended response
Attempt all questions.
Suggested time allocation
• Part A: 1 hour
• Part B: 40 minutes
• Part C: 50 minutes
Assessment
Assessment standards are at the end of this book.
After the examination
The supervisor will collect this book when you leave the examination room.
Supervisor use only
QSA use only
Supervisor’s initials
Marker number
––
Candidate use
Print your candidate number here
Attach barcode here
Number of books used
0 9
Planning space
Part A
Multiple choice
Suggested time allocation: 1 hour.This part has 20 questions of equal value. Attempt all questions.
Part A assesses Understanding Biology (UB).
Each question has four options, one of which is correct or is the best option. Respond to each question by selecting one of the four possible options and blackening the appropriate circle on the multiple-choice response sheet provided. Use a 2B pencil to blacken the circles.
No credit for your response will be given if more than one circle is blackened.
Question 1
The process by which a substance spreads from a region of high concentration to a region of low concentration is known as
Question 2
Which of the following organelles is more numerous in a muscle cell than in a bone cell?
Question 3
A student made a wet mount of a letter of the alphabet. Under the microscope on low power, it looked like “d”. What was the actual letter she made the slide of?
A osmosis.
B diffusion.
C pinocytosis.
D active transport.
A centriole
B ribosome
C lysosome
D mitochondria
A b
B d
C p
D q
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Question 4
The process of digestion can best be described as the
Question 5
A dish was filled with agar containing starch. In turn, five cavities are cut into the surface of the agar. Each cavity is then filled with a different liquid, then warmed and then flooded with iodine. The results are shown below.
What do the results suggest about the action of saliva on starch?
A release of energy from food.
B breakdown of organic molecules.
C breakdown of food in the stomach.
D splitting of bonds that bind nutrients together.
A The saliva has no affect on starch.
B Saliva only reacts with iodine, not starch.
C Boiled saliva and saliva treated with acids break down the starch.
D Saliva breaks down starch so it no longer tests positive with iodine.
Agar jelly and starchAgar jelly and starchAgar jelly and starch
Blue-black area afteriodine treatment
Clear areas after iodinetreatment
Distilledwater
Untreatedsaliva
Boiledsaliva
Saliva plusweak acid
Juice extractedfrom wheat
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Question 6
The diagram below refers to the female reproductive system.
The structure labelled X is the
Question 7
When blood sugar level falls, a hormone is secreted from an endocrine gland. The blood sugar level then returns to its normal level. With reference to this description, which of the following is the correct sequence?
A uterus.
B cervix.
C vagina.
D fallopian tube.
A stimulus, effector, control centre, response, receptor
B stimulus, receptor, control centre, effector, response
C stimulus, receptor, control centre, response, effector
D stimulus, effector, receptor, control centre, response
X
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Question 8
Which of the following is formed during fertilisation from the fusion of two gametes?
Question 9
Which of the following graphs best represents the level of glucose in the bloodstream after a large carbohydrate meal?
A a clone
B a foetus
C a zygote
D an embryo
A B
C D
Concentration ofblood glucose
Time after meal
Concentration ofblood glucose
Time after meal
Concentration ofblood glucose
Time after meal
Concentration ofblood glucose
Time after meal
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Question 10
When a large number of bacteria are placed on a medium that contains streptomycin, most of the bacteria die. Those that survive are then placed on a second dish that contains the same amount of streptomycin. Now most bacteria survive. Why do they survive?
Question 11
Charles Darwin proposed a theory known as natural selection which explains how evolution occurred. This theory is based on the idea that
Question 12
Alternative forms of a gene are
A They could not produce antibodies.
B They have a natural resistance to the streptomycin.
C They were able to build up a natural immunity to the streptomycin.
D They did not come into contact with enough streptomycin to kill them.
A favourable variations gradually become more common in the population.
B individual organisms acquire favourable characteristics.
C asexual reproduction causes variation.
D all variations are favourable.
A alleles.
B chromatids.
C karyotypes.
D chromosomes.
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Questions 13 and 14 refer to the following pedigree showing the inheritance of haemophilia.
Question 13
What is the chance of female 5 being a carrier?
Question 14
Female 3 is a carrier. If she decides to have a child with an unaffected male, what is the chance of her child being a haemophiliac?
Question 15
Which of the following is an example of a variable?
A 0%
B 25%
C 50%
D 100%
A 0%
B 25%
C 50%
D 100%
A the mass of a particular piece of filter paper
B leaving a plant in the sun for two hours
C the temperature during a particular day
D a particular person’s date of birth
1
3 4 5 6
2
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Question 16
Refer to the table below.
In which country was the rate of population growth the greatest?
Question 17
RNA does not contain which of the following molecules?
Question 18
Which of the following organisms has the greatest biomass in a particular community?
Country Birth rate(per thousand of population)
Death rate(per thousand of population)
Country 1 14.0 14.3
Country 2 44.0 11.0
Country 3 50.0 20.0
Country 4 42.0 17.0
A Country 1
B Country 2
C Country 3
D Country 4
A uracil
B guanine
C thymine
D cytosine
A predators
B producers
C herbivores
D third-order consumers
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Question 19
The following diagram represents aspects of the carbon cycle.
The three missing processes (in order X, Y, Z) are
Question 20
Densely packed organisms are living in one small area. They are most likely to compete if they belong to one species rather than if they belong to many different species. The most likely reason for this is that organisms of the same species
End of Part A
A photosynthesis, combustion, respiration
B photosynthesis, respiration, decay
C decay, photosynthesis, respiration
D respiration, decay, combustion
A have similar death rates.
B can produce more fertile offspring.
C have similar biological requirements.
D are less likely to move out of the area.
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Part B
Short response
Suggested time allocation: 40 minutes.
This part has five questions of equal value. Attempt all questions.
Part B assesses Investigating Biology (IB).
Respond to the questions in the spaces provided.
Question 1
A researcher was testing the hypothesis that the range of sound frequencies that a person can hear decreases as they age. Males and females of differing ages were selected. A sound generator produced noises that varied in frequency. State the dependent variable in this experiment.
Vitamin C is believed to prevent colds. To test this, 10000 volunteers were divided into four equal groups. Each person received a dose every evening for one year. The results were as follows:
State which group (1, 2, 3 or 4) is the control group. Justify your response.
height m x height m ---------------------------------------------------------------- =
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Part C
Extended response
Suggested time allocation: 50 minutes.
This part has two questions of equal value. Attempt both questions.
Part C assesses Evaluating Biological Issues (EBI).
Write an extended response to each of the questions on the following pages.
Each response must refer to biological principles, concepts and ideas.Plan your responses carefully. If you do a first draft and then a final draft, indicate which is the draft to be assessed.
Additional lined pages for responses, if required, are on pages 15–17. If you use the additional pages, label the question you are responding to in the box provided on each page.
Question 1
Stem cells are generally thought to be able to develop into many different cell types in the body. When a stem cell divides, each new cell has the potential to either remain a stem cell or become another type of cell with a more specialised function, such as a muscle cell, a red blood cell or a brain cell. Cancerous cells are those which display some form of uncontrolled growth. Occasionally, embryonic stem cells injected into patients can cause disabling if not deadly tumours. Justify the ongoing proposed use of stem cell therapy to treat patients with life-threatening conditions by critically evaluating the benefits and risks involved.
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Question 2
Organ transplantation is the replacement of body tissues. Discuss the positive and negative aspects of organ transplants. Predict the possible future directions for research.