A-LevelBiologyTransport in plants9700/12 · Oct/Nov 2015 · Q241 Mark
Sucrose is loaded into companion cells and phloem sieve tube elements by active transport and diffusion using transport proteins and plasmodesmata. Which row shows how sucrose is loaded?
Ainto companion cell into phloem sieve tube element into companion cell into phloem sieve tube element
Binto companion cell into phloem sieve tube element into phloem sieve tube element into companion cell
Cinto phloem sieve tube element into companion cell into companion cell into phloem sieve tube element
Dinto phloem sieve tube element into companion cell into phloem sieve tube element into companion cell
✓ Correct answer
A: into companion cell into phloem sieve tube element into companion cell into phloem sieve tube element
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