MS Sample Set 15, Round 4 from NSB
Which of the following nitrogenous bases is the most structurally similar to guanine? W) Thymine X) Uracil Y) Adenine Z) Cytosine
W: W) Thymine
X: X) Uracil
Y: Y) Adenine
Z: Z) Cytosine
Answer: Y) Y) Adenine
Which of the following is an example of a protist? W) Cyanobacterium X) Mosquito Y) Mushroom Z) Kelp
W: W) Cyanobacterium
X: X) Mosquito
Y: Y) Mushroom
Z: Z) Kelp
Answer: Z) Z) Kelp
If the intercepts of a line are (8, 0) and (0, –8), what is the slope-intercept equation of the line?
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Solve the following equation for x: x² + 17x – 480 = 0.
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A substance is sampled multiple times for some measurements. The mass is recorded on the y-axis and volume on the x-axis. What physical property of that substance will equal the slope?
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Which of the following diatomic bonds is most polar? W) Br – Br X) C – H Y) C – N Z) Cl – H
W: W) Br – Br
X: X) C – H
Y: Y) C – N
Z: Z) Cl – H
Answer: Z) Z) Cl – H
What is the term for the 3-kelvin radiation field that fills all of space?
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RR Lyrae and Cepheid stars are examples of what general type of stars?
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Researchers at Pacific Northwest National Lab are studying the genomes of fungi that are found living in a mutualistic relationship with algae. What is the term for this composite organism?
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Argonne National Lab researchers are studying how to biosynthesize gold nanoparticles within hypoxic tissues. The main organ they are studying accounts for 25% of the body’s oxygen demand but only 2% of the body’s mass. What organ is this?
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Mammals are named for their mammary glands, which produce what substance?
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Identify all of the following three statements that are true of single-celled organisms: 1) They are all prokaryotic; 2) They can sexually reproduce; 3) They include both autotrophs and heterotrophs.
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Giving your answer as a decimal, decreasing a number by 54% is equivalent to multiplying it by what?
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What is the volume of a rectangular pyramid with base dimensions 13 and 9 and height 15?
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David has two ramps with the same height but at different angles to the horizontal. He places identical marbles at the tops of the ramps and allows them to roll down. Which of the following quantities will be the same for the two marbles? W) Time taken to roll down the ramp X) Velocity at the bottom of the ramp Y) Acceleration along the ramp Z) Position along the ramp after one second
W: W) Time taken to roll down the ramp
X: X) Velocity at the bottom of the ramp
Y: Y) Acceleration along the ramp
Z: Z) Position along the ramp after one second
Answer: X) X) Velocity at the bottom of the ramp
Identify all of the following three ionic compounds that are readily soluble in water: 1) Lithium phosphate; 2) Silver nitrate; 3) Calcium hydroxide.
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What term is used to describe ground that is frozen for a period of at least two years?
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Identify all of the following three statements that are true of felsic magma: 1) It is more viscous than mafic magma; 2) It has a higher melting temperature than mafic magma; 3) It has a higher gas content than mafic magma.
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Scientists at Argonne National Lab are using copper-based photocatalysts to reduce carbon dioxide into useful compounds. To trace the movement of carbon atoms, they used carbon dioxide composed of a stable yet uncommon isotope of carbon. What isotope was this?
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Ames Lab has been developing a device called the SelectShred, which can recover rare earth elements from discarded disk drives. Identify all of the following three statements that are true of rare earth elements: 1) They are all metals; 2) They are all actinides; 3) Their total abundance in Earth’s crust is lower than gold.
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Halophytes are plants that have adapted to which of the following environmental challenges? W) Aridity X) Salinity Y) Long winters Z) Flooded soil
W: W) Aridity
X: X) Salinity
Y: Y) Long winters
Z: Z) Flooded soil
Answer: X) X) Salinity
The medulla, pons, and midbrain collectively form what structure of the brain?
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Simplify the following expression: 21 – 5 times 3.
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What is the largest prime factor of 2385?
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A wave is generated by moving one end of a rope up and down, so that the displacement of the rope is perpendicular to the direction of travel of the wave. What is the term for this type of wave?
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According to VSEPR theory, what is the molecular geometry of water? W) Bent X) Linear Y) Tetrahedral Z) Trigonal planar
W: W) Bent
X: X) Linear
Y: Y) Tetrahedral
Z: Z) Trigonal planar
Answer: W) W) Bent
Which of the following is primarily responsible for the presence of carbon-14 used in radiometric dating? W) Volcanic gases X) Biomass burning Y) Cosmic rays Z) Lightning
W: W) Volcanic gases
X: X) Biomass burning
Y: Y) Cosmic rays
Z: Z) Lightning
Answer: Y) Y) Cosmic rays
Which of the following minerals, when examined at a molecular level, would appear to be a stack of loosely interacting sheets? W) Muscovite X) Augite Y) Olivine Z) Quartz
W: W) Muscovite
X: X) Augite
Y: Y) Olivine
Z: Z) Quartz
Answer: W) W) Muscovite
Brookhaven National Lab researchers are working on a reactor that can reduce a notable greenhouse gas into compounds such as formic acid, ethanol, and acetic acid. Which greenhouse gas are they attempting to reduce?
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Lawrence Berkeley National Lab researchers are working to develop new uses for graphene, an atomically thin 2D material. Identify all of the following four statements that are true of graphene: 1) It is an excellent electrical conductor; 2) It is an excellent heat conductor; 3) It contains silicon atoms; 4) It contains carbon atoms.
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