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PUCET (Punjab) DPD — practice questions

Explore 2 free DPD questions in PUCET (Punjab) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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DPD questions and exercises with answers

Showing questions 1–2 of 2.

In a plant cell at flaccid state (TP = 0), the relationship between OP and DPD is:Read the answer and worked solution →If a plant cell has OP = 12 atm and TP = 4 atm, its **DPD** is:Read the answer and worked solution →

Worked practice questions

In a plant cell at flaccid state (TP = 0), the relationship between OP and DPD is:

  1. DPD = 0
  2. DPD = OP (since DPD = OP − TP = OP − 0)
  3. DPD = 2·OP
  4. DPD < 0
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Correct answer: B. DPD = OP (since DPD = OP − TP = OP − 0)

DPD = OP − TP. When TP = 0 (flaccid cell), DPD = OP. The cell can absorb water maximally. As it absorbs water, TP rises and DPD falls — until full turgidity (TP = OP, DPD = 0).

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If a plant cell has OP = 12 atm and TP = 4 atm, its **DPD** is:

  1. 16 atm
  2. 4 atm
  3. 8 atm (= 12 − 4)
  4. −8 atm
Show answer and solution

Correct answer: C. 8 atm (= 12 − 4)

DPD = OP − TP = 12 − 4 = 8 atm. This cell can still absorb water (it has 'thirst' equivalent to 8 atm).

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