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Graduate Chemistry Questions

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Graduate Biochemical Pathways
Which polysaccharide consists of individual long, twisted, unbranched chains of glucose?
  1. Starch
  2. Cellulose
  3. Glycogen
  4. This does not describe a polysaccharide.
Graduate Biochemical Pathways
In a recent newspaper article promoting the eating of seaweed and seaweed products, the argument was made that doing so was a more efficient use of energy than eating animals. Why would eating seaweed be more energy efficient than eating an animal?
  1. The energy found in animal matter represents a fraction of the energy found in the plant matter eaten by the animal. It would be better to just eat the plant and skip a step.
  2. The conversion of plant matter to animal matter produces less waste than converting animal material to animal material.
  3. Plant matter contains more energy per unit volume than does animal matter.
  4. Plant matter contains more energy per unit weight than does animal matter.
Graduate Biochemical Pathways
The reaction that results in the lengthening of a polymer chain by adding an additional monomer is called a                               .
  1. hydrolysis reaction
  2. hydrogen bond
  3. dehydration synthesis reaction
  4. Van Der Waals forces
Graduate Macromolecules
What might lead to a protein that does not function properly?
  1. Incorrect folding of the amino acid chain
  2. The active site becoming blocked
  3. The active site becoming distorted
  4. All of these
Graduate Biochemical Pathways
All living things require substantial quantities of carbon. Where do plants get the carbon they need to survive?
  1. From decaying organic matter
  2. From the air
  3. From the soil (but not water)
  4. From the water in the soil
Graduate Reactions
We use energy in many ways. Describe one thing we cannot do to energy.
  1. Destroy it.
  2. Waste it.
  3. Convert it
  4. Store it
Graduate Macromolecules
What makes the "head" of a phospholipid hydrophilic?
  1. The even distribution of electrons across the fatty acids makes the head polar.
  2. The uneven distribution of electrons across the fatty acids makes the head polar.
  3. The phosphate group carries a negative charge, making the head polar.
  4. The phosphate group carries a negative charge, making the head nonpolar
Graduate Biochemical Pathways
Phosphorylation of Fructose 6-Phosphate is allosterically inhibited by                             .
  1. High ATP
  2. High citrate
  3. Low Fructose 2,6 Bisphosphate
  4. Two of the Above
  5. All of the Above
Graduate Biochemical Pathways
What is pyruvate converted into in the mitochondria during gluconeogenesis?
  1. Citrate
  2. Malate
  3. ADP
  4. Phosphoenolpyruvate
  5. NADH
Graduate Biochemical Pathways
In the pathway favored by glucagon, carbon dioxide is released when                                                .
  1. Glucose 6-P ---> Fructose 6-P
  2. Isocitrate ---> a-Ketogluterate
  3. Succinyl CoA --> a-Ketogluterate
  4. 1,3 Bisphosphoglycerate ---> Glyceraldehyde 3-P
  5. None of the Above
Graduate Biochemical Pathways
What is the definition of energy?
  1. The capacity to do work
  2. The movement of an object
  3. Particles moving in waves through a system
  4. The amount of order in a system
Graduate Biochemistry
An organic molecule contains two or more atoms of                            .
  1. Carbon.
  2. Hydrogen.
  3. Oxygen.
  4. All of the answers are true
Graduate Biochemical Pathways
Choose the best explanation as to why both consumers and producers perform cellular respiration.
  1. Although they may obtain their sugars in different ways, both consumers and producers rely on cellular respiration to make ATP.
  2. Both consumers and producers perform cellular respiration to produce the sugars that will be "burned" to fuel the energy of life.
  3. Both consumers and producers perform cellular respiration to produce the oxygen necessary to sustain life.
  4. Both consumers and producers perform cellular respiration to produce the heat necessary to sustain life.
Graduate Periodic Table and Elements
He 2 | 4.003
  1. hydrogen
  2. helium
  3. beryllium
  4. boron
  5. carbon
  6. nitrogen
  7. oxygen
  8. fluorine
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