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College Biochemistry Questions

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College Biochemical Pathways
Of what does aerobic respiration comprise?
  1. the Electron Transport Chain
  2. Glycolysis and the Krebs Cycle
  3. Glycolysis
  4. the Krebs Cycle
  5. Krebs Cycle, Electron Transport Chain, Glycolysis
College Biochemical Pathways
Why is aerobic respiration performed?
  1. Cells need ATP replenished continuously
  2. ATP is not a stable storage molecule
  3. Energy is stored in molecules like glucose which must be converted to ATP
  4. All of the above
  5. None of the above
College Biochemical Pathways
Which of the following are products of cellular respiration?
  1. oxygen and ATP
  2. oxygen and carbon dioxide
  3. ATP and carbon dioxide
  4. oxygen and glucose
College Biochemical Pathways
What is the equation for the cellular respiration of glucose?
  1. C5 H12 O6 + 6O2 -> 5CO2 + 6H2O + ATP + heat
  2. 5CO2 + 6H2O -> C5 H12 O6 + 6O2 + ATP + heat
  3. C6 H12 O6 + ATP + heat -> 6CO2 + 6H2O + 6O2
  4. C6 H12 O6 + 6O2 -> 6CO2 + 6H2O + ATP + heat
  5. 4CO2 + 12H2O -> 2C5 H12 O6 + 8O2 + ATP + heat
College Biochemical Pathways
What is the primary function of the Calvin cycle?
  1. use ATP to release carbon dioxide
  2. use NADPH to release carbon dioxide
  3. synthesize simple sugars from carbon dioxide
  4. transport RuBP out of the chloroplast
  5. split water and release oxygen
College Macromolecules
Which of these can denature a protein?
  1. Heat
  2. changes in pH
  3. high salt concentration
  4. all of the above
College Macromolecules
What is the most common carbohydrate used in metabolism?
  1. Hydrogen
  2. Glucose
  3. Potassium
  4. ATP
College Biochemical Pathways
What mechanism allows you to smell a friend's cologne shortly after he or she has entered the room?
  1. filtration
  2. osmosis
  3. active transport
  4. pinocytosis
  5. diffusion
College Biochemical Pathways
What are the products of the Kreb's cycle?
  1. Pyruvate
  2. FADH2
  3. NADH
  4. CO2
  5. B, C, and D
College Biochemical Pathways
Where does the Calvin cycle take place?
  1. cytoplasm surrounding the chloroplast
  2. thylakoid membrane
  3. outer membrane of the chloroplast
  4. chlorophyll molecule
  5. stroma of the chloroplast
College Macromolecules
Why is ATP and important molecule in metabolism?
  1. Its hydrolysis provides an input of free energy for exergonic reactions
  2. It provides energy coupling between endergonic and exergonic reactions
  3. It's terminal phosphate group contains a strong ionic bond that when hydrolyzed releases free energy
  4. It's terminal phosphate bond has higher energy and the other two
  5. It is one of the four for DNA synthesis
College Macromolecules
Enzymes                       chemical reactions in living systems by                      the activation energy.
  1. slow down, decreasing
  2. slow down, increasing
  3. speed up, decreasing
  4. speed up, increasing
  5. stop, eliminating
College Biochemical Pathways
The process of glucose breakdown to produce ATP that occurs solely in the cytoplasm and does not require oxygen is termed?
  1. glycolysis
  2. Krebs cycle
  3. electron transport
  4. citric acid cycle
  5. none of the above
College Biochemical Pathways
Which of the following is not a catabolic reaction that cells use to get energy from nutrients?
  1. chemiosmosis
  2. photosynthesis
  3. digestion
  4. cellular respiration
College Biochemical Pathways
The production of ATP in photosynthesis is called                          .
  1. photophosphorylation
  2. chemiosmosis
  3. catabolism
  4. oxidative phosphorylation
College Macromolecules
How does a competitive inhibitor of an enzyme work?
  1. fitting into the enzyme's active site
  2. fitting into the allosteric site of the enzyme
  3. attaching itself to the substrate, thereby preventing the enzyme from making contact with substrate
  4. increasing the activation energy of the enzyme-catalyzed reaction
College Macromolecules
Which of the following determines the chemical reactivity of biological molecules?
  1. functional groups
  2. isomers
  3. number of carbon atoms
  4. length the hydrocarbon chain
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