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Home Biochemistry Photosynthesis and Respiration Comments

  • Question
  • 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

  • Correct Answer
  • ETS (electron transfer system) during the light reactions 


  • Photosynthesis and Respiration problems


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

    • Options
    • A. FADH2
    • B. ATP
    • C. NADP+
    • D. CO2
    • Discuss
    • 3. 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
    • 4. The followings are the products of the light reactions of photosynthesis except

    • Options
    • A. ATP
    • B. oxygen
    • C. NADPH
    • D. glucose
    • Discuss
    • 5. 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
    • 6. 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
    • 7. 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
    • 8. 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
    • 9. 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
    • 10. Which of the following is the best described glucogenic amino acid?

    • Options
    • A. Lysine
    • B. Tryptophan
    • C. Valine
    • D. None of these
    • Discuss


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