HS Sample Set 9, Round 8 from NSB
Meiosis I differs from mitosis in that: W) Meiosis I separates sister chromatids whereas mitosis does not X) Meiosis I introduces genetic diversity via crossing over whereas mitosis does not Y) Meiosis I lines up homologous chromosomes at the equator whereas mitosis does not Z) Meiosis I is much shorter than mitosis
W: W) Meiosis I separates sister chromatids whereas mitosis does not
X: X) Meiosis I introduces genetic diversity via crossing over whereas mitosis does not
Y: Y) Meiosis I lines up homologous chromosomes at the equator whereas mitosis does not
Z: Z) Meiosis I is much shorter than mitosis
Answer: X) X) Meiosis I introduces genetic diversity via crossing over whereas mitosis does not
Identify all of the following three organelles that are surrounded by a double membrane: 1) Nucleus; 2) Lysosome; 3) Ribosome.
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Which of the following countries uses the highest percentage of wind power per annum to generate electricity? W) France X) Australia Y) Denmark Z) Iceland
W: W) France
X: X) Australia
Y: Y) Denmark
Z: Z) Iceland
Answer: Y) Y) Denmark
Which of the following materials could be used as a moderator in a nuclear reactor? W) Uranium X) Graphite Y) Zirconium Z) Cesium
W: W) Uranium
X: X) Graphite
Y: Y) Zirconium
Z: Z) Cesium
Answer: X) X) Graphite
How many faces does a regular icosahedron have?
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You have a sample of 30 values that correspond to the amount of money you spent on gas each month. You notice that the highest value was mistakenly recorded with an extra zero, but after correcting it, it remains the highest value. Identify all of the following three values that change after the correction: 1) Mean; 2) Median; 3) Range
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Argon gas has a total of 3 degrees of freedom. How many of these degrees of freedom are rotation and vibrational, respectively?
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Which of the following molecules has a tetrahedral molecular geometry? W) Sulfur tetrafluoride X) Xenon tetrafluoride Y) Carbon tetrafluoride Z) Bromine tetrafluoride anion
W: W) Sulfur tetrafluoride
X: X) Xenon tetrafluoride
Y: Y) Carbon tetrafluoride
Z: Z) Bromine tetrafluoride anion
Answer: Y) Y) Carbon tetrafluoride
Which of the following is a warm core, low pressure system? W) Anticyclone X) Hurricane Y) Nor’easter Z) Mid-latitude cyclone
W: W) Anticyclone
X: X) Hurricane
Y: Y) Nor’easter
Z: Z) Mid-latitude cyclone
Answer: X) X) Hurricane
A total solar eclipse can occur only during what phase of the moon? W) Full moon X) New moon Y) First quarter Z) Last quarter
W: W) Full moon
X: X) New moon
Y: Y) First quarter
Z: Z) Last quarter
Answer: X) X) New moon
How much energy, in joules, does a circuit containing a 1.5 volt battery and a 2 ohm resistor dissipate over 8 seconds?
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A spring with spring constant k = 200 N/m with a 0.5 kg mass attached is released from rest at 0.02 m from its equilibrium point. What is the magnitude, in meters per second, of the maximum velocity attained by the mass?
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Which of the following is least likely to improve the rate of an endothermic reaction involving two gas species reacting on the wall of a vessel? W) Coating the wall with a catalyst X) Increasing the volume Y) Increasing the reactant partial pressure Z) Increasing the temperature
W: W) Coating the wall with a catalyst
X: X) Increasing the volume
Y: Y) Increasing the reactant partial pressure
Z: Z) Increasing the temperature
Answer: X) X) Increasing the volume
A gas expands by 1.2 L at a constant pressure of 2.5 bar. During the expansion, 500 J of heat is added. Given that 1 bar = 10^5 Pa, find the change, in joules, in the internal energy of the gas.
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At which of the following pH values would pepsin likely be most active? W) 2 X) 4 Y) 6 Z) 8
W: W) 2
X: X) 4
Y: Y) 6
Z: Z) 8
Answer: W) W) 2
What group of monoamine hormones is derived from tyrosine?
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What type of conic section is represented by the following equation: $$0 = x^2 + 2x - y^2 + 6y - 14$$ W) Ellipse X) Circle Y) Hyperbola Z) Parabola
W: W) Ellipse
X: X) Circle
Y: Y) Hyperbola
Z: Z) Parabola
Answer: Y) Y) Hyperbola
If the equations 2x + 8 = 4 and ax – 30 = –22 both have the same solution for x, what is the value of a?
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Reaction A has the same change in Gibbs free energy per mole of reactants as reaction B. If 2 mol of electrons are transferred per mole of reactants in reaction A, and 3 mol of electrons are transferred per mole of reactants in reaction B, what is the ratio of the redox potential for reaction A to that of B?
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Which of the following amino acids is present in collagen and is often called an imino acid? W) Cysteine X) Serine Y) Glutamic acid Z) Proline
W: W) Cysteine
X: X) Serine
Y: Y) Glutamic acid
Z: Z) Proline
Answer: Z) Z) Proline
The rate at which temperature decreases with increasing altitude is known as the: W) Temperature slope X) Lapse rate Y) Temperature sounding Z) Thermocline
W: W) Temperature slope
X: X) Lapse rate
Y: Y) Temperature sounding
Z: Z) Thermocline
Answer: X) X) Lapse rate
A backdoor cold front is most likely to occur in which of the following states? W) Florida X) California Y) Maine Z) Michigan
W: W) Florida
X: X) California
Y: Y) Maine
Z: Z) Michigan
Answer: Y) Y) Maine
Identify all of the following three particles that would be deflected while traveling in a magnetic field: 1) Positron; 2) Neutrino; 3) Neutron.
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An object sits in front of a spherical mirror with a focal length of 20 cm. The image produced by the mirror is upright and has a height one-third that of the original object. Which of the following is true? W) The image is real and the mirror is convex X) The image is real and the mirror is concave Y) The image is virtual and the mirror is convex Z) The image is virtual and the mirror is concave
W: W) The image is real and the mirror is convex
X: X) The image is real and the mirror is concave
Y: Y) The image is virtual and the mirror is convex
Z: Z) The image is virtual and the mirror is concave
Answer: Y) Y) The image is virtual and the mirror is convex
Which of the following are examples of asexual reproduction? W) Fragmentation, budding, and binary fission X) Parthenocarpic fruit development and budding Y) Binary fission and zygote formation Z) Fragmentation and sporogenesis
W: W) Fragmentation, budding, and binary fission
X: X) Parthenocarpic fruit development and budding
Y: Y) Binary fission and zygote formation
Z: Z) Fragmentation and sporogenesis
Answer: W) W) Fragmentation, budding, and binary fission
Conifers often have needlelike leaves, which are an adaptation to arid conditions. The slopes of mountains, however, often have dense conifer populations and experience a large amount of rainfall each year. Which of the following correctly explains why trees with adaptations to arid climates flourish near mountains? W) Albedo near mountains is high, desiccating normal leaves X) Most soil water is frozen, rendering it unavailable to the tree Y) The high winds near mountains increase the rate of desiccation Z) The soil around mountains drains poorly
W: W) Albedo near mountains is high, desiccating normal leaves
X: X) Most soil water is frozen, rendering it unavailable to the tree
Y: Y) The high winds near mountains increase the rate of desiccation
Z: Z) The soil around mountains drains poorly
Answer: X) X) Most soil water is frozen, rendering it unavailable to the tree
What scientist is credited with discovering electrons and calculating their mass to charge ratio?
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When computing freezing point depression and boiling point elevation most directly, what measure of solute concentration should be used, which has units of moles per kilogram?
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A continuous function f has domain the closed interval from 1 to 25 and range the closed interval from 3 to 30. If f′(x) < 0 for all x in [1,25], what is f(25)? W) 1 X) 3 Y) 25 Z) 30
W: W) 1
X: X) 3
Y: Y) 25
Z: Z) 30
Answer: X) X) 3
The two legs of a right triangle have lengths of 6 and $2\sqrt{3}$. How long is the altitude to the hypotenuse? W) 2 X) 3 Y) 4 Z) 5
W: W) 2
X: X) 3
Y: Y) 4
Z: Z) 5
Answer: X) X) 3
A chinook wind causes which of the following? W) Cooling and moistening of air X) Cooling and drying of air Y) Warming and moistening of air Z) Warming and drying of air
W: W) Cooling and moistening of air
X: X) Cooling and drying of air
Y: Y) Warming and moistening of air
Z: Z) Warming and drying of air
Answer: Z) Z) Warming and drying of air
Compared with Earth, Mars has: W) A denser atmosphere X) A shorter year Y) More surface water Z) Lower average surface temperature
W: W) A denser atmosphere
X: X) A shorter year
Y: Y) More surface water
Z: Z) Lower average surface temperature
Answer: Z) Z) Lower average surface temperature
What is the law that describes the relationship between the magnetic field contribution and its source current element?
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The daylight color of the sky is most directly caused by which type of scattering?
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Which of the following quantities increases with the addition of a catalyst? W) Gibbs free energy X) Activation energy Y) Reaction rate Z) Equilibrium constant
W: W) Gibbs free energy
X: X) Activation energy
Y: Y) Reaction rate
Z: Z) Equilibrium constant
Answer: Y) Y) Reaction rate
Which of the following occurs when a dilute solution of ammonia is added to a solution containing iron(III) ions? W) Fe(NH₂)₃ precipitates X) Fe(OH)₃ precipitates Y) The solution turns from yellow to blue Z) Hydrogen gas is given off
W: W) Fe(NH₂)₃ precipitates
X: X) Fe(OH)₃ precipitates
Y: Y) The solution turns from yellow to blue
Z: Z) Hydrogen gas is given off
Answer: X) X) Fe(OH)₃ precipitates
What term describes the random motion of particles suspended in a fluid resulting from collisions with individual fluid atoms or molecules?
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Which of the following is a disadvantage of using LEDs over incandescent light sources? W) Shorter lifespan X) Larger size Y) Higher energy consumption Z) Temperature dependence of performance quality
W: W) Shorter lifespan
X: X) Larger size
Y: Y) Higher energy consumption
Z: Z) Temperature dependence of performance quality
Answer: Z) Z) Temperature dependence of performance quality
You have some number of marbles of several different sizes and colors. For any set of 5 marbles, at least two of them will be the same size and at least two of them will be the same color. What is the maximum possible number of size-color combinations?
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Determine all values in the closed interval $[0,\,2\sqrt{3}]$ that are prescribed by Rolle’s Theorem for $$f(x)=x^3-12x\,. $$
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Which of the following statements most accurately describes Einstein’s first postulate of special relativity? W) The speed of light in a vacuum is the same in all inertial reference frames X) The laws of physics are the same in all inertial reference frames Y) It is impossible for an observer to travel at the speed of light in a vacuum Z) An observer cannot discern between inertial acceleration and acceleration due to gravity
W: W) The speed of light in a vacuum is the same in all inertial reference frames
X: X) The laws of physics are the same in all inertial reference frames
Y: Y) It is impossible for an observer to travel at the speed of light in a vacuum
Z: Z) An observer cannot discern between inertial acceleration and acceleration due to gravity
Answer: X) X) The laws of physics are the same in all inertial reference frames
What phenomenon occurs in solid materials that results in a burst of light when the material is crushed or scratched?
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Which of the following methods was used to determine the 3D structure of hemoglobin? W) Circular dichroism X) X-ray crystallography Y) Protein NMR Z) Electrolysis
W: W) Circular dichroism
X: X) X-ray crystallography
Y: Y) Protein NMR
Z: Z) Electrolysis
Answer: X) X) X-ray crystallography
What common second messenger is released after epinephrine binds to liver GPCRs and was the subject of the 1994 Nobel Prize?
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A line of brown semicircles on a weather map indicates: W) A warm front X) A cold front Y) A dry line Z) Smog
W: W) A warm front
X: X) A cold front
Y: Y) A dry line
Z: Z) Smog
Answer: Y) Y) A dry line
What structural modification did the United States introduce to enable atmospheric pollutants such as nitrogen and sulfur oxides to be dispersed at higher altitudes?
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