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College Biochemical Pathways Questions

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College Biochemical Pathways
What are some other molecules that can be used to generate ATP in cellular respiration?
  1. Lipids
  2. Proteins
  3. RuBP
  4. A and B
  5. None of the above
College Biochemical Pathways
Which of the following happens during the electron transport chain in light reactions?
  1. water splitting enzymes do not split water
  2. electrons move across the thylakoid to gain energy, and then transfer their energy to atp
  3. electron's lost energy is used to pull protons into the stroma
  4. electron's lost energy is used to pull protons out of the stroma
  5. the pigments absorb all wavelengths of light
College Biochemical Pathways
ATP, the energy molecule of the cell, is known to perform phosphorylation of many different molecules. What does this mean?
  1. ATP can recieve many different phosphate groups
  2. ATP can convert molecules into nucleic acids
  3. ATP can donate phosphate groups to other molecules
  4. ATP can release a large amount of energy when hydrolized
College Biochemical Pathways
In glycolysis, the exergonic reaction 1,2-diphosphoglycerate -> 3-phosphoglycerate is coupled to the reaction ADP + Pi -> ATP. which of the following is most likely to be true about the reaction ADP + Pi -> ATP?
  1. Temperature will not affect the rate constant of the reaction.
  2. There is a large decrease in free energy.
  3. The reaction is endergonic.
  4. The reaction never reaches equilibrium.
  5. The reaction is spontaneous.
College Biochemical Pathways
Pyruvate                                                  .
  1. is the molecule that starts the citric acid cycle
  2. is a product of glucose oxidation by glycolysis
  3. is the end product of oxidative phosphorylation
  4. is a six-carbon molecule
  5. is produced by pyruvate oxidation
College Biochemical Pathways
Where does glycolysis occur in an animal cell or plant cell?
  1. mitochondrial matrix
  2. cytoplasmic fluid
  3. inner mitochondrial membrane
  4. electron transport chain
  5. outer mitochondrial membrane
College Biochemical Pathways
Which of the following is the proper sequence by which proteins are digested by different enzymes?
  1. pepsin-trypson-carboxypeptidase-dipeptidase
  2. pepsin-trypron-dipeptidase-carboxypeptidase
  3. trypsin-pepsin-carboxypeptidase-dipeptidase
  4. trypsin-pepsin-dipeptidase-carboxypeptidase
  5. dipeptidase-carboxypeptidase-pepsin-trypsin
College Biochemical Pathways
In which of the following does the electron transport chain run through?
  1. Stroma
  2. Granum
  3. Thylakoid
  4. Outer Membrane
  5. Thylakoid Membrane
College Biochemical Pathways
Which of these describes anabolic reactions?
  1. are examples of kinetic energy.
  2. require light.
  3. are the breakdown of complex molecules into more simple components.
  4. require an input of energy.
  5. always occur in the absence of catabolic reactions.
College Biochemical Pathways
All living systems require constant input of                .
  1. Free Energy
  2. Sunlight
  3. Food
  4. Glucose
  5. Water
College Biochemical Pathways
The Z scheme is                                                                                                           .
  1. the passing of high-energy electrons through ATP synthase.
  2. another name for the splitting of water.
  3. the wavelengths of light absorbed by a specific molecule.
  4. a graph of the energy state of electrons when they are bounced out of the pigments of the reaction center.
  5. the addition of CO2 to RuBP to form a six-carbon sugar.
College Biochemical Pathways
During photosynthesis, to where does the reactant carbon dioxide supply oxygen atoms?
  1. the products glucose and water
  2. the product glucose only
  3. the product water only
  4. the oxygen molecules only
  5. the products glucose, water, and oxygen
College Biochemical Pathways
The main control point of glycolysis is the glycolytic enzyme                          .
  1. kinase.
  2. acetylfructokinase.
  3. phosphofructokinase.
  4. oxaloacetate convertase.
  5. isocitrate dehydrogenase.
College Biochemical Pathways
Noncyclic photophosphorylation requires the coordinated action of four transmembrane enzyme complexes. These transmembrane membranes complexes are                                                                                .
  1. Photosystem I, Photosystem II, phosphofructokinase, ATP synthase.
  2. Photosystem I, NADP+ reductase, plastocyanin and ferredoxin.
  3. Photosystem II, cytochrome b6/f, Photosystem I and ATP synthase
  4. Photosystem II, the antenna complex, carotenoid pigments and protoporphyrin IX.
College Biochemical Pathways
What occurs during noncyclic electron flow?
  1. both photosystem I and II split water
  2. only photosystem I splits water
  3. both photosystems must operate to form NADPH
  4. neither photosystem splits water
  5. no NADPH is formed
College Biochemical Pathways
Which of the following statements about the enzyme Rubisco is true?
  1. Rubisco is found in the Krebs cycle
  2. Rubisco is found in the light reactions of photosynthesis
  3. Rubisco is a very slow enzyme
  4. Some plants do photosynthesis without Rubisco
  5. There are little amounts of Rubisco in a plant
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