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Graduate Chemistry Questions

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Graduate Properties of Matter
Water "beads up" on synthetic fabric like polyester but binds to cotton. What is the most likely explanation for this?
  1. Polyester is not a naturally occurring substance, whereas cotton is a naturally occurring substance.
  2. Polyester is more flexible than cotton.
  3. Polyester fibers are thinner than cotton fibers.
  4. Polyester is nonpolar, whereas cotton is polar.
Graduate Macromolecules
Which would have the highest concentration of C-H bonds?
  1. Saturated fat
  2. Unsaturated fat
  3. Trans fat
  4. Cholesterol
Graduate Atomic Structure
How many neutrons in a carbon-14 atom?
  1. 6
  2. 7
  3. 8
  4. 14
Graduate Molecules and Compounds
What is a compound?
  1. a variable mixture
  2. 2 or more elements chemically combined.
  3. a mix of cells
  4. a combination of all the cells in an animal
Graduate Biochemical Pathways
Identify the principal role of cellular respiration.
  1. To convert solar energy into the chemical energy of sugars
  2. To convert kinetic energy into the chemical energy of sugars
  3. To convert the chemical energy of sugars into the chemical energy that fuels life's processes
  4. To convert the chemical energy of sugars into heat to maintain an elevated body temperature
Graduate Biochemical Pathways
Organize the following steps of the light reaction in order.
  1. Absorb sunlight, produce high-energy electron carriers, produce oxygen, split water
  2. Absorb sunlight, produce high-energy electron carriers, split water, produce oxygen
  3. Absorb sunlight, split water, produce oxygen, produce high-energy electron carriers
  4. Absorb sunlight, produce oxygen, split water, produce high-energy electron carriers
Graduate Macromolecules
The functional group -NH2 is called the                 group.
  1. methyl
  2. alcohol
  3. amino
  4. carboxyl
Graduate Biochemical Pathways
NADH is anaerobically produced in what pathway(s)?
  1. Glycolysis
  2. Oxidative Phosphorylation
  3. Gluconeogenesis
  4. Two of the Above
  5. All of the Above
Graduate Kinetics and Equilibrium
Predict what would happen as the entropy of a system approached 100%.
  1. All motion would stop.
  2. Randomness would become maximized.
  3. Order would become maximized.
  4. Heat would decrease.
Graduate Solvents, Solutes, and Solubility
Why is one side of a water molecule partially negative while the other side is partially positive?
  1. Uneven sharing of electron pairs occurs due to the strong pull of hydrogen.
  2. Uneven sharing of electron pairs occurs due to the strong pull of oxygen.
  3. Oxygen donates its electrons to hydrogen
  4. Hydrogen donates its electrons to oxygen.
Graduate Macromolecules
Which of the following large organic molecules includes table sugar?
  1. Carbohydrates
  2. Lipids
  3. Proteins
  4. Nucleic acids
Graduate Biochemistry
What is the most common element in your body?
  1. Oxygen
  2. Water
  3. Carbon
  4. Sugar
Graduate Macromolecules
What is the name of the chemical bond linking monosaccharide subunits in disaccharides?
  1. glycosidic bond
  2. glycodiester bond
  3. hydrogen bond
  4. peptide bond
  5. phosphodiester bond
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