MCAT Question of the Day
    •

    Q:

    		 Chlorophyll absorbs maximally in red and blue wavelengths. Consider a genetically modified plant which expresses an enzyme that emits red and blue light using energy from the conversion of ATP to ADP. If the plant were placed in complete darkness, would it be able to grow sustainably from the light energy emitted by the enzymes?
    		 

    A

    		 No, because the amount of energy absorbed by the plant must be greater than or equal to the energy involved in the metabolism of the plant, impossible under the described conditions since the light energy emitted must be less than the energy involved in the metabolism of the plant.

    B

    		 No, because the amount of energy absorbed by the plant must be less than or equal to the energy involved in the metabolism of the plant, yet the energy emitted by the enzymes is greater than the the energy involved in the metabolism of the plant.

    C

    		 Yes, because the energy emitted from the enzyme is greater than the required energy for metabolic metabolic processes required to produce the light.

    D

    		 Yes, because only a small amount of light energy is needed to stimulate growth; the remainder can come from the soil, air, and water.



    Enzyme Structure and Function | Energy & Work |
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