#phloem loading MCQ

PSS- Sec-F-Transport

Apoplastic phloem loading is inhibited by PCMBS because it blocks:

Answer: C) Membrane transporters. For PSS- Sec-F-Transport, remember the key idea and you’ll land on this option; the distractors usually swap cause and effect or confuse similar terms. Avoid: A) Photosynthesis; B) Plasmodesmata; D) Xylem flow. Name the process first, then pick the option that describes it — don’t reverse cause and effect.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

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PHLOEM TRANSLOCATION+PYQS

Polymer trapping mechanism involves synthesis of:

Raffinose and stachyose (C) is correct here. This is core PHLOEM TRANSLOCATION: once you know the definition or pathway step, Raffinose and stachyose is the clear fit. The wrong ones are A) Glucose; B) Starch; D) Cellulose. If the topic is about gradients or potentials, water/solutes move from higher to lower of the relevant quantity.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

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PHLOEM TRANSLOCATION+PYQS

Symplastic phloem loading mainly occurs via:

Answer: B) Plasmodesmata. For PHLOEM TRANSLOCATION, remember the key idea and you’ll land on this option; the distractors usually swap cause and effect or confuse similar terms. Avoid: A) Cell wall; C) Xylem vessels; D) Intercellular spaces. Name the process first, then pick the option that describes it — don’t reverse cause and effect.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

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PHLOEM TRANSLOCATION+PYQS

Apoplastic phloem loading involves transport through:

Correct option is C, Cell wall space. In PHLOEM TRANSLOCATION problems like this, the accurate statement is Cell wall space; the others are common mix-ups. Not these: A) Plasmodesmata; B) Cytoplasm; D) Vacuole. Tissue transport questions usually turn on xylem vs phloem, living vs dead cells, or source vs sink.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

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