HS Sample Set 11, Round 13 from NSB
What hormone targets the kidneys and stimulates reabsorption of water from urine?
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What thyroid hormone plays a role in inhibiting calcium loss from bones?
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Identify all of the following three changes that would increase the magnetic field outside an ideal solenoid of infinite length: 1) Increasing current strength; 2) Increasing turn density; 3) Adding an iron core.
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What mineral is commonly used in watch crystals and radio transmitters due to its piezoelectric properties?
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Which of the following statements is TRUE concerning SN2 reactions? W) Pentavalent transition state X) Pentavalent intermediate Y) Trivalent transition state Z) Trivalent intermediate
W: W) Pentavalent transition state
X: X) Pentavalent intermediate
Y: Y) Trivalent transition state
Z: Z) Trivalent intermediate
Answer: W) W) Pentavalent transition state
Identify all of the following three statements concerning crystal structures that are true: 1) The FCC lattice fills volume more efficiently than the BCC lattice; 2) The number of atoms in a BCC unit cell is 4; 3) The coordination number of an FCC lattice is 12.
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Which of the following solar cell systems has the highest efficiency? W) Silicon X) Gallium Arsenide Y) Thin Film Photovoltaic Z) Polymeric Photovoltaic
W: W) Silicon
X: X) Gallium Arsenide
Y: Y) Thin Film Photovoltaic
Z: Z) Polymeric Photovoltaic
Answer: X) X) Gallium Arsenide
Which of the following materials would most likely be used as a catalyst for fuel cells? W) Titanium X) Silver Y) Carbon Z) Palladium
W: W) Titanium
X: X) Silver
Y: Y) Carbon
Z: Z) Palladium
Answer: Z) Z) Palladium
Given that the function f of x has a zero at x = 6, at what x-value must 2 + f of x have a zero? W) 3 X) 4 Y) 8 Z) It need not have a zero
W: W) 3
X: X) 4
Y: Y) 8
Z: Z) It need not have a zero
Answer: Z) Z) It need not have a zero
What is the real quadratic polynomial with least possible positive integer leading coefficient that has 7 – 8i as a zero?
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What type of feature is the Moon’s Rupes Recta? W) Fault X) Ridge Y) Bay Z) Valley
W: W) Fault
X: X) Ridge
Y: Y) Bay
Z: Z) Valley
Answer: W) W) Fault
When corals bleach due to warming seas they expel what symbiotic organisms, leaving them vulnerable to starvation and disease? W) Chlorella X) Diatoms Y) Zooxanthellae Z) Spirogyra
W: W) Chlorella
X: X) Diatoms
Y: Y) Zooxanthellae
Z: Z) Spirogyra
Answer: Y) Y) Zooxanthellae
What is the adjective for the type of nephron that possesses long loops of Henle in order to promote water reabsorption?
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Rank the following four plasma proteins in terms of increasing mass: 1) Fibrinogen; 2) Transferrin; 3) Albumin; 4) Immunoglobulin G.
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Modulo a dimensionless constant, the Heisenberg uncertainty principle relates the products of momentum and positional uncertainties to what constant?
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In the Grand Unified Theory, which of its three unified forces separates from the other two earliest on?
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Rank the following three substances in order of increasing energy density: 1) Bituminous coal; 2) Gasoline; 3) TNT.
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Metal-organic frameworks, or MOFs, are a subject of research at Lawrence Berkeley National Lab. Which of the following is a potential use of MOFs? W) Tools for quantum computing X) Developing more accurate predictions via density functional theory Y) Efficient storage of gases Z) Homogeneous catalysts
W: W) Tools for quantum computing
X: X) Developing more accurate predictions via density functional theory
Y: Y) Efficient storage of gases
Z: Z) Homogeneous catalysts
Answer: Y) Y) Efficient storage of gases
What is the greatest integer that is less than or equal to the log base 6 of 975?
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To the nearest degree, what is the measure of each interior angle of a regular 65-sided polygon?
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Which of these is true regarding the Sargasso sea? W) It has relatively low biological productivity X) It is adjacent to the Bay of Bengal Y) It is primarily a hypoxic dead zone Z) It has the saltiest ocean water
W: W) It has relatively low biological productivity
X: X) It is adjacent to the Bay of Bengal
Y: Y) It is primarily a hypoxic dead zone
Z: Z) It has the saltiest ocean water
Answer: W) W) It has relatively low biological productivity
Rank the following three stars in order of increasing surface temperature: 1) Arcturus; 2) Betelgeuse; 3) The Sun.
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Which of the following compounds would have the largest retention factor in a TLC experiment with a silica stationary phase and hexane mobile phase? W) Benzene X) Benzoic acid Y) Phenylacetone Z) Benzyl methyl ether
W: W) Benzene
X: X) Benzoic acid
Y: Y) Phenylacetone
Z: Z) Benzyl methyl ether
Answer: X) X) Benzoic acid
Arrange the following three hydrogens in a proton-NMR spectrum in terms of increasing chemical shift: 1) Hydrogens in benzene; 2) Aldehyde hydrogen in acetaldehyde; 3) Hydroxyl group in methanol.
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If the definite integral from 1 to 6 of f(x) dx = 21, then what is the definite integral from 1 to 6 of (f(x) – 3) dx?
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What is the sum of the squares of the first 20 positive integers?
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In inductors, the back EMF generated most directly depends on which of the following properties of the circuit? W) Voltage X) Time derivative of voltage Y) Current Z) Time derivative of current
W: W) Voltage
X: X) Time derivative of voltage
Y: Y) Current
Z: Z) Time derivative of current
Answer: Z) Z) Time derivative of current
In an electromagnetic motor, what conductive component generates an electromotive force?
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Which of the following scientific names correctly describes a family of plants? W) Quercus rubra X) Liliaceae Y) Poales Z) Magnoliophyta
W: W) Quercus rubra
X: X) Liliaceae
Y: Y) Poales
Z: Z) Magnoliophyta
Answer: X) X) Liliaceae
Identify all of the following three statements that are true of second messengers: 1) Phospholipase C catalyzes the release of IP3; 2) Cells store calcium in the nucleus; 3) Calmodulin binds to cyclic GMP.
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What is the empirical formula for the acid anhydride of phosphoric acid?
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Identify all of the following four compounds in which London dispersion forces dominate intermolecular interactions: 1) Dichloromethane; 2) Neon; 3) Ammonia; 4) Hydrogen.
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DOE scientists at SLAC have been using the Linac Coherent Light Source to study SNARE proteins in the brain. Which of the following processes are SNARE proteins involved with? W) Vesicle docking X) Actin polymerization Y) Intracellular trafficking Z) Hormonal signalling
W: W) Vesicle docking
X: X) Actin polymerization
Y: Y) Intracellular trafficking
Z: Z) Hormonal signalling
Answer: W) W) Vesicle docking
Researchers at Lawrence Berkeley National Lab are currently working on optimizing plants to produce less lignin. For which of the following are these genetically modified plants likely to be used? W) Construction materials X) Ethanol production Y) Insulation Z) Food
W: W) Construction materials
X: X) Ethanol production
Y: Y) Insulation
Z: Z) Food
Answer: X) X) Ethanol production
Which of the following is closest to the percentage of the Earth's total surface water contained in ice caps, glaciers, and permanent snow? W) 2 X) 13 Y) 25 Z) 45
W: W) 2
X: X) 13
Y: Y) 25
Z: Z) 45
Answer: W) W) 2
The orbital period of Pluto is 248 years. For what percentage of Pluto's orbital period is it closer to the Sun than Neptune is? W) 8 X) 24 Y) 37 Z) 48
W: W) 8
X: X) 24
Y: Y) 37
Z: Z) 48
Answer: W) W) 8
What is the major acidic species that forms when an acid is dissolved in water?
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Identify all of the following three compounds that have a higher lattice energy than sodium fluoride: 1) Sodium chloride; 2) Aluminum fluoride; 3) Sodium oxide.
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Which animal phylum contains the most extant species?
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Identify all of the following three nucleobases that are purines: 1) Guanine; 2) Uracil; 3) Thymine.
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What is the name for the device Michelson and Morley used to disprove the existence of luminiferous aether?
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A hydrogen atom is in its 4th excited state. What is the value of its principal quantum number n?
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What is the general term for the formation of mountains?
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What soil horizon is composed primarily of decaying organic matter?
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The point (5, 6) is reflected across the y-axis and the resulting point is then translated 4 units down. What are the coordinates of the final image point?
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At what x-value does the maximum value of the function f(x) = 2x^3 – 3x^2 – 12x – 6 occur on the closed interval from –4 to 4?
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