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Home Biochemistry Photosynthesis and Respiration Comments

  • Question
  • The electrons that are released by the splitting of water during photosynthesis ultimately end up in


  • Options
  • A. ATP
  • B. O2
  • C. NADPH
  • D. rubisco

  • Correct Answer
  • NADPH 


  • Photosynthesis and Respiration problems


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    • 1. Which of the following is the reduced form of a temporary electron carrier molecule?

    • Options
    • A. FADH2
    • B. ATP
    • C. NADP+
    • D. CO2
    • Discuss
    • 2. As a result of the photosynthetic process, which product is formed?

    • Options
    • A. Oxygen
    • B. Water
    • C. Carbon dioxide
    • D. Both (a) and (b)
    • Discuss
    • 3. The followings are the products of the light reactions of photosynthesis except

    • Options
    • A. ATP
    • B. oxygen
    • C. NADPH
    • D. glucose
    • Discuss
    • 4. If the oxygen is labeled in CO2 and provide this CO2 to a plant, where it is expected to find this labeled oxygen after the plant had undergone photosynthesis?

    • Options
    • A. In the water used
    • B. In the NADPH
    • C. In the carbohydrate produced
    • D. In the oxygen given off by the plant
    • Discuss
    • 5. In algae, photosynthesis takes place in

    • Options
    • A. choloroplasts
    • B. cell membrane
    • C. mitochondria
    • D. none of the above
    • Discuss
    • 6. Carbon fixation requires the expenditure of ATP molecules which is generated by

    • Options
    • A. formation of glucose during the Calvin cycle
    • B. replenishment of chlorophyll
    • C. ETS (electron transfer system) during the light reactions
    • D. none of the above
    • Discuss
    • 7. A person with phenylketonuria is advised not to consume which of the following products?

    • Options
    • A. Glycine containing foods
    • B. Fat containing food
    • C. Glucose
    • D. Aspartame
    • Discuss
    • 8. A ketogenic amino acid is one which degrades to

    • Options
    • A. keto-sugars
    • B. either acetyl CoA or acetoacetyl CoA
    • C. pyruvate or citric acid cycle intermediates
    • D. multiple intermediates including pyruvate or citric acid cycle intermediates and acetyl CoA or acetoacetyl CoA
    • Discuss
    • 9. An example of a transamination process is

    • Options
    • A. glutamate = hexanoic acid + NH3
    • B. aspartate + hexanoic acid = glutamate + oxaloacetate
    • C. aspartate + ? ketoglutarate = glutamate + oxaloacetate
    • D. glutamate = ?-ketoglutarate + NH3
    • Discuss
    • 10. Histidine is degraded to ?-ketoglutarate and is described as a

    • Options
    • A. gluco amino acid
    • B. glucogenic amino acid
    • C. ketogenic amino acid
    • D. keto-gluco amino acid
    • Discuss


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