Phototropins repress transcription of a gene that causes auxin efflux carriers to be distributed evenly around the cell. What happens next, when phototropins are released as a response to a plant cell being exposed to a directional light source?
a. Auxin efflux carriers become positioned on the sunny side of the plant.
b. Auxin efflux carriers become positioned on the shady side of the plant.
c. Auxin buildup occurs within the cells, but in no set pattern.
d. Auxin efflux carriers become positioned on the shady side of the plant and the plant bends towards the light.
e. Auxin efflux carriers become positioned on the sunny side of the plant and the plant bends towards the shade.
d
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a(n)_______.
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