MS Sample Set 12, Round 13 from NSB
Which of the following describes the lines represented by the equations $$5x - 6y = 30$$ and $$10x + 12y = 60$$? W) They are parallel X) They are skew Y) They intersect at exactly one point Z) They are the same line
W: W) They are parallel
X: X) They are skew
Y: Y) They intersect at exactly one point
Z: Z) They are the same line
Answer: Y) Y) They intersect at exactly one point
To the nearest integer, what is the geometric mean of 6 and 55?
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Which of the following distances is NOT approximately equal to one light year? W) 0.3 parsecs X) 9.5 petameters Y) 3.2 giga-lightseconds Z) 5.9 teramiles
W: W) 0.3 parsecs
X: X) 9.5 petameters
Y: Y) 3.2 giga-lightseconds
Z: Z) 5.9 teramiles
Answer: Y) Y) 3.2 giga-lightseconds
Identify all of the following three particles that are freely found in solar wind: 1) Protons; 2) Neutrons; 3) Electrons.
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For an inelastic collision, identify all of the following three quantities that are conserved: 1) Momentum; 2) Kinetic energy; 3) Total energy.
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Identify all of the following three changes that would change the magnitude of the force between two point charges: 1) Reversing the sign of one of the charges; 2) Increasing the distance between the charges; 3) Doubling the first charge and halving the second charge.
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A cell is undergoing mitosis and has its paired chromatids aligned at the center of the cell. In what stage of mitosis is the cell? W) Telophase X) Prophase Y) Metaphase Z) Interphase
W: W) Telophase
X: X) Prophase
Y: Y) Metaphase
Z: Z) Interphase
Answer: Y) Y) Metaphase
In healthy mammals, which of the following is least likely to be filtered out of the bloodstream by the glomerulus? W) Albumin X) Urea Y) Water Z) Potassium
W: W) Albumin
X: X) Urea
Y: Y) Water
Z: Z) Potassium
Answer: W) W) Albumin
Rice paddies are flooded fields. Due to microscopic organisms in this swampy environment, rice paddies contribute nearly 20% of all global emissions of what greenhouse gas?
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To visualize the DNA coiling with HU proteins, the researchers used light from what range of the electromagnetic spectrum?
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Which of the following sets of conditions is most conducive to ductile deformation of rock? W) High pressures and high temperatures X) High pressures and low temperatures Y) Low pressures and high temperatures Z) Low pressures and low temperatures
W: W) High pressures and high temperatures
X: X) High pressures and low temperatures
Y: Y) Low pressures and high temperatures
Z: Z) Low pressures and low temperatures
Answer: W) W) High pressures and high temperatures
Assuming Pratt isostasy and giving your answer in kilometers, calculate the height of a mountain range with a mean crustal density of 2500 kg/m³ if it is in isostatic equilibrium with an adjacent, sea-level plain that is 20 km thick and has a density of 2700 kg/m³.
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According to valence bond theory, how many electrons are being shared between two atoms of fluorine in diatomic fluorine gas?
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Identify all of the following four molecules that are polar: 1) CH₄; 2) NH₃; 3) H₂O; 4) HF.
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Solve the following equation for x: $$5^{x+2} = \frac{1}{25}$$
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What is the volume in liters of a circular cylindrical container with a radius of 30 cm and a height of 1.1 m?
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The human hip is an example of what type of joint? W) Ball-and-socket X) Saddle Y) Hinge Z) Pivot
W: W) Ball-and-socket
X: X) Saddle
Y: Y) Hinge
Z: Z) Pivot
Answer: W) W) Ball-and-socket
Identify all of the following three options that are examples of qualitative data: 1) Nick’s body temperature is 99 °F; 2) Kevin walks slowly; 3) Kate can lift a maximum of 40 pounds.
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Scientists using the Advanced Photon Source have solved the structure of the glucagon receptor, providing a potential therapeutic target for what disease? W) Breast cancer X) Tay-Sachs disease Y) Cystic fibrosis Z) Diabetes mellitus
W: W) Breast cancer
X: X) Tay-Sachs disease
Y: Y) Cystic fibrosis
Z: Z) Diabetes mellitus
Answer: Z) Z) Diabetes mellitus
Researchers at Pacific Northwest National Lab are studying the dependence of mouse embryo implantation on the levels of what tumor-suppressor gene often lost in cancers, which is named for the molar mass of its protein product?
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Which of the terrestrial planets has the largest atmospheric pressure at its surface?
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Identify all of the following four planets that currently have active plate tectonics: 1) Mercury; 2) Venus; 3) Earth; 4) Mars.
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What happens to the population of white blood cells when a bacterial infection occurs? W) Increases X) Decreases Y) Stays the same Z) Shifts to red blood cells
W: W) Increases
X: X) Decreases
Y: Y) Stays the same
Z: Z) Shifts to red blood cells
Answer: W) W) Increases
FAD is a cofactor derived from what vitamin? W) A X) B Y) E Z) K
W: W) A
X: X) B
Y: Y) E
Z: Z) K
Answer: X) X) B
Assuming a gravitational force equal to that on the surface of the Earth, what integer is closest to the weight in pounds of a 6-kilogram mass?
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What is the remainder when the polynomial $$x^3 + 2x^2 + x - 7$$ is divided by $$x + 4$$?
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Researchers at Brookhaven National Lab are developing sodium-ion batteries as a potential replacement for lithium-ion batteries. However, like lithium-ion batteries, they lose capacity over hundreds of charge cycles. Which of the following best explains the reason for loss in capacity? W) Sodium ions get oxidized to sodium metal over time X) Sodium ions escape the battery enclosure during recharging Y) Irreversible side reactions occur slowly over time Z) Sodium ions get reduced to sodium metal over time
W: W) Sodium ions get oxidized to sodium metal over time
X: X) Sodium ions escape the battery enclosure during recharging
Y: Y) Irreversible side reactions occur slowly over time
Z: Z) Sodium ions get reduced to sodium metal over time
Answer: Y) Y) Irreversible side reactions occur slowly over time
Argonne National Lab researchers are studying iridium oxide nanoparticles as a catalyst for the water-splitting reaction. Which of the following has the highest concentration of iridium? W) Meteorites X) Earth’s crust Y) Earth’s mantle Z) Earth’s lithosphere
W: W) Meteorites
X: X) Earth’s crust
Y: Y) Earth’s mantle
Z: Z) Earth’s lithosphere
Answer: W) W) Meteorites
According to the Lewis theory of acids and bases, a base is a species that can donate what?
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What is the formal charge on the central nitrogen atom in nitrous oxide, which has the formula N₂O?
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Which of the following best describes the watershed of the Mississippi River? W) The land west of the Rocky Mountains X) The land between the Rocky and Appalachian Mountains Y) The land between the Sierra Nevada and Rocky Mountains Z) The land east of the Appalachian Mountains
W: W) The land west of the Rocky Mountains
X: X) The land between the Rocky and Appalachian Mountains
Y: Y) The land between the Sierra Nevada and Rocky Mountains
Z: Z) The land east of the Appalachian Mountains
Answer: X) X) The land between the Rocky and Appalachian Mountains
Identify all of the following three glacial features that consist of sorted, layered sediments: 1) Kames; 2) Eskers; 3) Drumlins.
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Which of the following types of enzymes would most likely be involved in changing glucose-6-phosphate to glucose-1-phosphate? W) Isomerase X) Phosphatase Y) Kinase Z) Ligase
W: W) Isomerase
X: X) Phosphatase
Y: Y) Kinase
Z: Z) Ligase
Answer: W) W) Isomerase
Reflexes are mediated by what major structure in the central nervous system?
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What is the following sum of three fractions: $$\frac{1}{5} + \frac{1}{9} + \frac{1}{45}$$?
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A circle has an area of 49. What is its circumference?
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What type of wave is composed of two equally-sized waves that move in opposite directions and interfere continuously with each other?
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On a graph of force versus displacement, what quantity is best represented by the area underneath the curve?
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What greenhouse gas can comprise up to 4 percent of the Earth’s atmosphere?
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Identify all of the following three items that will influence rock weathering rate: 1) Rock composition; 2) Presence of cracks; 3) Local precipitation.
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Deoxygenated blood enters the human heart in what chamber?
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Identify all of the following three molecules that are proteins: 1) Keratin; 2) Casein; 3) Insulin.
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The radius of a sphere is multiplied by 8. By what factor is its surface area multiplied?
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A certain medication has a 60% success rate of curing people who have a specific illness. If three people with the illness are selected at random and take the medicine, what is the probability that exactly two of the three people will be cured?
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Which of the following metals has the most similar valence electron configuration to silver? W) Iridium X) Rhodium Y) Titanium Z) Gold
W: W) Iridium
X: X) Rhodium
Y: Y) Titanium
Z: Z) Gold
Answer: Z) Z) Gold
Order the following four substances by increasing length of the alkanes that typically compose them: 1) Kerosene; 2) Asphalt; 3) Natural gas; 4) Gasoline.
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