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NEST2023BiologyTransport in Plants

Autoradiography of a green leaf of summer squash (upper panel) showed import of ¹⁴ C carbon from the source over a period of time. A similar experiment was carried out with an albino tobacco leaf (lower panel) which do not photosynthesize. Shaded portions denote ¹⁴ C labelling. Based on these observations the correct option(s) is(are)

Options

  1. AIn the early stages of development, the leaf acts as a source.
  2. BMature leaf gains the ability to load and export sugar.
  3. CThe import to export transition is dependent on the developmental stage of leaves irrespective of photosynthes
  4. DImport cessation and export initiation are two separate events.

Correct answer

D. Import cessation and export initiation are two separate events.

Step-by-step solution

No solution available.

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