This section is Section 2 of 3.

Speed as well as accuracy is important in this section. Work quickly, or you might not finish the paper. There are no penalties for incorrect responses, only marks for correct answers, so you should attempt all 27 questions. Each question is worth one mark.

You must complete the answers within the time limit. Calculators are NOT permitted.

Good Luck!

The graph shows changes in the mass of glycogen stored in the liver and skeletal muscles.

1. During which periods will the concentration of insulin in the blood be below normal?
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    Explanation

    The correct answer is E.

    Post Comment

    Compound T has a melting point of 78 °C and a boiling point of 134 °C. T is soluble in water and its solution does not conduct electricity. T has covalent bonding and has a simple molecular structure.

    2. Which property of T is not usually associated with its bonding and structure?
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    Explanation

    The correct answer is C.

    Post Comment

    A particular radioisotope X with a half-life of 4 years decays into the stable isotope Y.

    At a particular time, a sample contains 32 x 10²º atoms of nuclide X and 4 x 10²º atoms of nuclide Y.

    3. How many atoms of nuclide Y will be present in the sample 8 years later?
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    Explanation

    The correct answer is F.

    Post Comment

    The amount of water in urine is controlled by the hormone ADH.

    blood concentration is: ADH production nephron action urine concentration becomes:
    A Dilute falls less water reabsorbed

    dilute

    B

    concentrated rises more water reabsorbed concentrated
    C Dilute rises less water reabsorbed

    dilute

    D

    concentrated falls more water reabsorbed concentrated
    E Dilute falls more water reabsorbed

    concentrated

    F

    concentrated rises less water reabsorbed

    dilute

    4. Which sequence of events will occur when you need to keep water in your body?
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    Explanation

    The correct answer is B.

    Post Comment

    Listed are the electronic configurations for the atoms of different elements.

     

    5. Which one represents the most reactive non-metal?
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    Explanation

    The correct answer is C.

    Post Comment

    The sides of triangle ABC are as follows:

    AB = 3, AC = 2, BC = 4

    Use the cosine rule, a 2 = b2 + c 2 – 2bc cos A , to find the cosine of ∠BAC

    6.
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    Explanation

    The correct answer is A.

    Post Comment

    The following statements can be applied to certain types of wave:

    1. Their oscillations are longitudinal.

    2. They travel at the speed of light in air.

    3. They are used in pre-natal scanning.

    4. They are used in thermal imaging.

    5. They will not travel through a vacuum.

    7. Which of these statements can be applied to microwaves?
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    Explanation

    The correct answer is A.

    Post Comment

    A health club monitors the average heart rate of its members when using a cardiovascular workout machine. The lower quartile of the heart rate is 115, the upper quartile is 165.

    8. What is the probability that when a group of 4 members is chosen at random at least 3 of them had an average heart rate of more than 165 when doing this workout?
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    Explanation

    The correct answer is C.

    Post Comment

    NH₃(g) + HCl(g) ⇋ NH₄Cl(s)

    1. Adding a catalyst

    2. Adding more ammonia

    3. Increasing the pressure

    4. Increasing the temperature

    9. Which changes to the conditions will increase the yield of the salt in the exothermic reaction shown?
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    Explanation

    The correct answer is B.

    Post Comment

    A gene controls the production of chlorophyll in lettuce plants. The recessive allele of this gene blocks chlorophyll formation which prevents seedling development.

    Plants heterozygous for this gene were cross bred and 1000 of their seeds were planted. Only about 750 developed into mature plants.

    10. What percentage of these mature plants would be heterozygous for this gene?
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    Explanation

    The correct answer is D.

    Post Comment

    A force F is applied to the piston X of a brake pedal. This force is transmitted, hydraulically, to piston Y as shown in the diagram.

    Diameter of piston X = 2 cm.

    Diameter of piston Y = 20 cm.

    The pressure applied at X is 3 N/cm2

    11. What is the pressure transmitted to Y?
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    Explanation

    The correct answer is C.

    Post Comment

    In statistics Spearman’s rank correlation coefficient is given by the formula:

    12. Rearrange the formula to make ∑ d² the subject.
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    Explanation

    The correct answer is E.

    Post Comment

    At 200 °C, potassium hydrogen carbonate decomposes according to the following equation.

    2KHCO₃ → K₂CO₃ +H₂O+ CO₂

    13. What is the loss in mass when 50.0 g of potassium hydrogencarbonate are heated at 200 °C to constant mass? ( Ar : H = 1; C = 12; O = 16; K = 39 )
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    Explanation

    The correct answer is B.

    Post Comment

    Find the positive solution of the following simultaneous equations:

    4x 2 + y 2 + 10 y = 47

    2x y = 5

    14.
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    Explanation

    The correct answer is B.

    Post Comment

    The diagram shows part of the circulatory system.

    concentration of substances in the blood

    highest concentration of glucose

    highest concentration of urea

    lowest concentration of oxygen

    A 1 5

    4

    B

    5 3 4
    C 2 2

    3

    D

    1 5 2

    E

    2 3

    3

    F 5 2

    2

    15. Which row of the table identifies the blood vessels that best fit the descriptions after eating a carbohydrate rich meal?
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    Explanation

    The correct answer is E.

    Post Comment

    An object with a mass of 20 kg is lifted by the arrangement shown in the diagram. Air resistance (drag) can be ignored, and the gravitational field strength (acceleration due to gravity) can be taken as 10 N/kg.

    16. What is the acceleration of the object, in m/s²?
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    Explanation

    The correct answer is B.

    Post Comment

    The element has a mass number of 40 and an atomic number of 20.

    1. The nucleus has a relative mass of 20.

    2. It is a noble gas.

    3. It would form a negative ion.

    4. It is in group 2 of the periodic table.

    5. It is a non-metallic element.

    17. Consider the statements and decide which of them are correct.
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    Explanation

    The correct answer is E.

    Post Comment

    The table shows some details of the composition of inhaled and exhaled air of a student.

    Gas

    Inhaled air Exhaled air
    Carbon dioxide 0.03%

    4%

    Nitrogen

    78% 78%

    Oxygen

    21%

    16%

    The student is breathing 500 cm³ of air 14 times per minute.

    18. How many dm³ of oxygen will be absorbed into the lung capillaries in 4 minutes?
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    Explanation

    The correct answer is C.

    Post Comment

    Which row of the table shows the response of the iris to reducing levels of light?

    radial muscles circular muscles pupil
    A contract relax

    is contracted

    B

    relax contract is dilated
    C contract relax

    is dilated

    D

    relax contract

    is contracted

    19.
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    Explanation

    The correct answer is C.

    Post Comment

    Five identical resistors are connected to a cell as in the diagram.

    The potential differences across R1 , R 2 and R3 are V1 , V2 and V3 respectively.

    20. What is the order of increasing potential differences (smallest first)?
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    Explanation

    The correct answer is E.

    Post Comment

    Evaluate

    21.
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    Explanation

    The correct answer is B.

    Post Comment

    The energy profile for a reaction is shown  below.

    22. Which of the following is a fully correct statement about this energy level profile?
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    Explanation

    The correct answer is D.

    Post Comment

    The diagram shows the dispersion of white light as it passes from air into glass.

    Red light travels at speed c in air, but only 2c/3 in glass. Red light has a wavelength of λ in air.

    frequency of red light in glass speed of blue light in glass
    A 2c/3λ

    < 2c/3

    B

    2c/3λ > 2c/3
    C c/λ 

    < 2c/3

    D

    c/λ  > 2c/3

    E

    3c/2λ

    < 2c/3

    F 3c/2λ

    > 2c/3

    23. What is the frequency of red light, and the speed of blue light in glass?
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    Explanation

    The correct answer is C.

    Post Comment

    The statements are about respiration.

    1. Aerobic respiration releases more energy per unit mass of glucose than anaerobic respiration.

    2. Aerobic respiration in muscles causes an oxygen debt to occur.

    3. Aerobic respiration forms carbon dioxide as the only waste product.

    4. Reduced aerobic respiration will limit the active uptake of mineral ions in the kidney tubules.

    5. When there is little oxygen available to muscles only anaerobic respiration occurs.

    6. Anaerobic respiration forms lactic acid as the only waste product.

    24. Which statements are correct?
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    Explanation

    The correct answer is E.

    Post Comment

    In stars four protons, p, are fused together to form helium, 4 He , with a mass of four units, by the following processes.

    2p → 2 H + e+

    2 2H + p → 3 He

    2 3 He → 4 He + 2p

    (e+ is a positively charged electron, n is a neutron, 2 H is a hydrogen of mass two and 3 He is helium of mass three.)

    25. Which one of the following shows the overall change that has taken place when formed?
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    Explanation

    The correct answer is B.

    Post Comment

    a is inversely proportional to the square of b.

    When a = 9 , b = 4 .

    26. What is the positive value of b when a=4?
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    Explanation

    The correct answer is A.

    Post Comment

    A small conducting sphere is held at a fixed distance from a larger sphere which is continually charged by a generator.

    The surface area of the large sphere is 0.04m2 , and it discharges by sparking to the small sphere when the charge density on the large sphere reaches 0.25 C/m².

    charge density = charge per unit surface area

    27. If the large sphere is charged at a rate of 2 mA, calculate the time interval (in seconds) between sparks.
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    Explanation

    The correct answer is B.

    Post Comment

    BMAT 2006 S2 Review Screen

    Instructions

    Below is a summary of your answers. You can review your questions in three (3) different ways.

    The buttons in the lower right-hand corner correspond to these choices:

    1. Review all of your questions and answers.
    2. Review questions that are incomplete.
    3. Review questions that are flagged for review. (Click the 'flag' icon to change the flag for review status.)

    You may also click on a question number to link directly to its location in the exam.

    BMAT 2006 S2 Section

    Final Answer Review Screen

    Instructions

    This review section allows you to view the answers you made and see whether they were correct or not. Each question accessed from this screen has an 'Explain Answer' button in the top left hand side. By clicking on this you will obtain an explanation as to the correct answer.

    At the bottom of this screen you can choose to 'Review All' answers, 'Review Incorrect' answers or 'Review Flagged' answers. Alternatively you can go to specific questions by opening up any of the sub-tests below.

    BMAT 2006 S2 Section

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