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College Biochemical Pathways Questions

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College Biochemical Pathways
During cellular respiration, oxygen
  1. delivers electrons to the destination known as the citric acid cycle.
  2. is chemically converted to ATP.
  3. delivers its electrons to the electron transport chain.
  4. is reduce to NADP+.
  5. acts the final electron acceptor.
College Biochemical Pathways
1. One of the most abundant proteins on Earth, aids in carbon fixation
2. The enzyme for one of the earliest steps in glycolysis, is highly regulated in mammals
  1. NADH, NADPH
  2. FAD, FADH2
  3. Phosphofructokinase, ATP synthase
  4. Rubisco, ATP synthase
  5. Rubisco, Phosphofructokinase
College Biochemical Pathways
What are the products of glycolysis? Select all that apply.
  1. 2 ATP/glucose molecule
  2. NADPH
  3. NAD+
  4. 2 pyruvic acids
  5. FADH2
College Biochemical Pathways
The [math]CO_2[/math] we exhale is produced during which stage of respiration?
  1. ETC
  2. Glycosis
  3. Kreb's Cycle
  4. Kreb's Cycle and ETC
  5. Calvin Cycle
College Biochemical Pathways
What is the final stage of glucose oxidation?
  1. intermediate stage
  2. glycolysis
  3. citric acid cycle
  4. electron transport system
College Biochemical Pathways
Respiration                                        and cellular respiration                                       .
  1. produces ATP ..... is gas exchange
  2. is gas exchange ..... produces ATP
  3. produces glucose ..... produces oxygen
  4. uses glucose ..... produces glucose
  5. light energy ..... produces ADP
College Biochemical Pathways
What are the main products of photosynthesis?
  1. glucose and oxygen
  2. ATP and oxygen
  3. mesophyll
  4. photosynthesis
College Biochemical Pathways
The third stage of glucose oxidation is called                          .
  1. intermediate stage
  2. glycolysis
  3. citric acid cycle
  4. electron transport system
College Biochemical Pathways
Photosynthesis is the process by which                                                                                     .
  1. autotrophs convert glucose into ATP molecules
  2. animals are able to supple themselves and all other organisms with food
  3. producers convert light energy into chemical energy using simple inorganic molecules
  4. plants convert glucose into water, oxygen, and ATP molecules using light energy
  5. autotrophs convert chemical energy into light energy
College Biochemical Pathways
Which of the following occurs during the light-independent reactions of photosynthesis?
  1. Water is converted into hydrogen and water.
  2. CO2 is converted into sugars.
  3. Chlorophyll acts as an enzyme.
  4. Nothing occurs; the plant rests in the dark.
  5. None of the above
College Biochemical Pathways
During photosynthesis, ATP molecules are generated by
  1. chemiosmosis
  2. the splitting of water
  3. digestion
  4. fermentation
College Biochemical Pathways
What is the molecule that enters the citric acid cycle?
  1. pyruvic acid
  2. lactic acid
  3. citric acid
  4. acetyl coenzyme A
College Biochemical Pathways
If the arrow in the below chemical formula points to the right, what process is it and which steps occur during that process?
[math] 6CO_2 +12 H_2O square C_6H_12O_6 + 6O_2 + 6H_2O [/math]
  1. Cellular respiration: Glycolysis, Kreb's cycle, ETC
  2. Photosynthesis: Glycosis, Kreb's cycle, ETC
  3. Cellular respiration: Light dependent reactions, Calvin cycle
  4. Photosynthesis: Glycolysis, Kreb's cycle, ETC
  5. Photosynthesis: Light dependent reactions, Calvin Cycle
College Biochemical Pathways
In the absence of oxygen, yeast cells can obtain energy by fermentation, resulting in the production of                             .
  1. ATP, CO2, and lactate
  2. ATP, pyruvate and acetyl CoA
  3. ATP, NADPH, and pyruvate
  4. ATP, pyruvate and oxygen
  5. ATP, CO2 and ethanol
College Biochemical Pathways
To what does pyruvate undergo oxidation when it loses electrons?
  1. carbon dioxide
  2. NAD+
  3. glucose
  4. NADH
College Biochemical Pathways
Why do photosynthesis and aerobic respirations form a balanced cycle in the biosphere?
  1. both processes produce about equal amounts of oxygen
  2. both processes break down organic molecules into CO2 and H2O
  3. both processes occur in the mitochondria
  4. their overall reactions are exactly the opposite of one another
  5. photosynthesis operates only in plants, while respiration operates only in animals
College Biochemical Pathways
Match the method of producing ATP with the appropriate choices below.

1. An inefficient pathway that can be used when no oxygen is present, makes lactic acid or ethanol to regenerate NAD+

2. Method employed by mostly bacteria in environments with no oxygen

3. A method that uses oxygen as the final electron acceptor
  1. Anaerobic respiration, Aerobic respiration, Fermentation
  2. Fermentation, Anaerobic respiration, Aerobic Respiration
  3. Aerobic respiration, Anaerobic respiration, Fermentation
  4. Fermentation, Aerobic respiration, Anaerobic respiration
  5. None of the above
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