MS Sample Set 12, Round 15 from NSB
Researchers at Lawrence Berkeley National Lab have developed covalent organic frameworks capable of partially reducing CO₂ to what compound used in the production of fuels, pharmaceuticals, and plastics?
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Researchers at Ames Lab are examining flexible solar cells using electron paramagnetic resonance, a technique that allows examinations of unpaired electrons. Which of the following structures can be studied using this technique? W) Free radicals X) Nitrogen gas Y) Glucose Z) Alkanes
W: W) Free radicals
X: X) Nitrogen gas
Y: Y) Glucose
Z: Z) Alkanes
Answer: W) W) Free radicals
Identify all of the following three processes that are considered net sinks of carbon dioxide: 1) Calcite precipitation 2) Respiration 3) Photosynthesis
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An endorheic lake lacks which of the following features? W) Fish X) Confining aquitard Y) River outlets Z) Annual turnover cycle
W: W) Fish
X: X) Confining aquitard
Y: Y) River outlets
Z: Z) Annual turnover cycle
Answer: Y) Y) River outlets
Which of the following human organs has the largest mass? W) Kidneys X) Spleen Y) Lungs Z) Pancreas
W: W) Kidneys
X: X) Spleen
Y: Y) Lungs
Z: Z) Pancreas
Answer: Y) Y) Lungs
Identify all of the following three structures that are considered plant organs: 1) Tracheids 2) Roots 3) Leaves
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What SI unit is equivalent to one joule divided by one watt?
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A stationary spring with spring constant of 10 kilograms per second squared pushes horizontally against a 2-kilogram brick on the floor. The spring is able to be compressed up to 40 centimeters without the brick moving. To the nearest tenth, what is the coefficient of static friction between the brick and the floor?
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What hydrogen-containing compound comprises the upper-most cloud layers on Jupiter?
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Identify all of the following three statements that are true of stellar spectroscopy: 1) Spectral emission lines are typically narrow 2) Emission lines can be used to identify elements in the Sun 3) Emission lines correspond to electron energy level transitions
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Which of the following translations changes the graph of y = x² into that of y = (x + 4)² – 6? W) 6 units down and 4 units to the left X) 6 units down and 4 units to the right Y) 6 units up and 4 units to the left Z) 6 units up and 4 units to the right
W: W) 6 units down and 4 units to the left
X: X) 6 units down and 4 units to the right
Y: Y) 6 units up and 4 units to the left
Z: Z) 6 units up and 4 units to the right
Answer: W) W) 6 units down and 4 units to the left
Two runners each run a 200-meter race at a constant pace, finishing in 23 and 26 seconds, respectively. To the nearest whole number, how many meters separate them when the winner finishes?
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What is the oxidant in a zinc-air battery?
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Scientists at Argonne National Lab have been using Bragg coherent diffraction imaging to probe the structures of nanometer-sized crystals. What part of the electromagnetic spectrum is used for this imaging? W) X-ray X) Ultraviolet Y) Visible Z) Infrared
W: W) X-ray
X: X) Ultraviolet
Y: Y) Visible
Z: Z) Infrared
Answer: W) W) X-ray
In what era did the supercontinent Pangaea break up?
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Place the following three reef types in increasing order of age: 1) Fringing 2) Atoll 3) Barrier
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What is the term for a substance that slows down a chemical reaction?
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Identify all of the following three molecules that are aromatic: 1) Benzene 2) Cyclohexane 3) Hexane
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A collaboration between Harvard University and Argonne National Lab researchers is studying peptidoglycan breakdown. Which of the following enzymes catalyzes this process? W) Amylase X) Peptidase Y) Lysozyme Z) Catalase
W: W) Amylase
X: X) Peptidase
Y: Y) Lysozyme
Z: Z) Catalase
Answer: Y) Y) Lysozyme
Researchers at Ames National Lab discovered a zinc-platinum catalytic particle that achieves what desirable pairing of physical properties? W) Low surface area, low volume X) High surface area, low volume Y) Low surface area, high volume Z) High surface area, high volume
W: W) Low surface area, low volume
X: X) High surface area, low volume
Y: Y) Low surface area, high volume
Z: Z) High surface area, high volume
Answer: X) X) High surface area, low volume
Convert two-five in base 7 to base 10.
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A rhombus has sides of length 10 and largest angle of measure 120 degrees. What is its area?
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Over hundreds of years, a population of black worms slowly stratifies into a group of ground-dwelling worms and a group of tree-dwelling worms. What type of isolation is observed here? W) Behavioral isolation X) Temporal isolation Y) Habitat isolation Z) Gametic isolation
W: W) Behavioral isolation
X: X) Temporal isolation
Y: Y) Habitat isolation
Z: Z) Gametic isolation
Answer: Y) Y) Habitat isolation
Identify all of the following three molecules that are produced by glycolysis: 1) Pyruvate 2) ATP 3) NADH
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Galena, pyrite, and cinnabar are all metal ores that contain what nonmetal element?
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When measuring liquid in a buret, your eyes should be at the same height as the top of the liquid for accurate measurement. This is a best practice to correct for what? W) Concave meniscus X) Convex meniscus Y) Parallax Z) Preventing the formation of bubbles
W: W) Concave meniscus
X: X) Convex meniscus
Y: Y) Parallax
Z: Z) Preventing the formation of bubbles
Answer: Y) Y) Parallax
In a right triangle, what is the sine of an angle with a cosine of one-third the square root of 5?
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What number must be added to the polynomial $2x^2 + 14x$ to complete the square?
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The Japanese used a powerful weather force to send balloons with bombs across the Pacific to the US during WWII. This relied on what strong westerly air current located near the tropopause?
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Local water table levels vary over time in response to a variety of factors. Which of the following statements best describes the cause of the formation of a “cone of depression”? W) Pumping rate exceeds recharge rate in an aquifer X) Water flows out of the aquifer into a gaining stream Y) Permeability decreases due to a drought Z) A flowing artesian well remains upcapped for a long period of time
W: W) Pumping rate exceeds recharge rate in an aquifer
X: X) Water flows out of the aquifer into a gaining stream
Y: Y) Permeability decreases due to a drought
Z: Z) A flowing artesian well remains upcapped for a long period of time
Answer: W) W) Pumping rate exceeds recharge rate in an aquifer
What kingdom, originally described by Carl Woese, contains many extremophile prokaryotes?
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Sharks have repeated rows of identical teeth that are shed throughout their lives. Which of the following best categorizes their teeth? W) Heterodont X) Hypsodont Y) Homodont Z) Diphyodont
W: W) Heterodont
X: X) Hypsodont
Y: Y) Homodont
Z: Z) Diphyodont
Answer: Y) Y) Homodont
What general type of reaction involves the reaction of an acid with a base to form water and salt?
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Identify all of the following three terms that can always be used to describe a compound with a carbon–carbon double bond: 1) Saturated 2) Alkene 3) Polymer
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Which of the following MUST be true of an H II region? W) It contains large specks of dust X) It is close to one or more hot stars Y) It is close to one or more cold stars Z) It is neutral in charge
W: W) It contains large specks of dust
X: X) It is close to one or more hot stars
Y: Y) It is close to one or more cold stars
Z: Z) It is neutral in charge
Answer: X) X) It is close to one or more hot stars
The r- and s-processes can occur in the cores of massive stars, enabling them to do what? W) Create nuclei heavier than iron X) Generate electron degeneracy pressure Y) Create more protons to support the core Z) Fuse elements such as silicon
W: W) Create nuclei heavier than iron
X: X) Generate electron degeneracy pressure
Y: Y) Create more protons to support the core
Z: Z) Fuse elements such as silicon
Answer: W) W) Create nuclei heavier than iron
What is the term for the post-translational modification of an amino acid residue by a kinase?
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Gram-positive bacteria are so named because they show up purple under a Gram stain. What polymer in their cell wall causes them to turn purple?
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What is the degree of the product of the three binomials x + 3, x⁵ + x³, and x⁴ – 4?
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Given the arithmetic sequence with first three terms –10, –4, 2, what is the 118th term?
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What is the ratio of the intensity of an 80-decibel sound to that of a 40-decibel sound?
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The speed of waves on a 6-meter string fixed at both ends is 5 meters per second. In hertz, what is the frequency of the third harmonic?
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If two similar triangles have a scale factor of 3/5, and a side of the larger has length 8, what is the length of the corresponding side of the smaller triangle?
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What is the units digit of 3 to the 2018th power?
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What method for identifying protein structures involves the interpretation of diffraction patterns of proteins in the solid state?
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Which of the following does NOT occur during prometaphase? W) The nuclear membrane dissolves X) Chromatids arrive at opposite cell poles Y) Kinetochores form as proteins attached to centromeres Z) Microtubules attach to kinetochores
W: W) The nuclear membrane dissolves
X: X) Chromatids arrive at opposite cell poles
Y: Y) Kinetochores form as proteins attached to centromeres
Z: Z) Microtubules attach to kinetochores
Answer: X) X) Chromatids arrive at opposite cell poles