Igcse Model Questions Vol1 2017 Biology Question 22

Practice objective / multiple choice question 22 from the 2017 Igcse Model Questions Vol1 Biology examination.

Igcse Model Questions Vol1 2017 Biology Objective / Multiple Choice Easy Difficulty
Question 22 IGCSE_MODEL_QUESTIONS_VOL1 • 2017 • BIOLOGY • objective

A plant cell contains a large central vacuole that occupies about 80 % of the cell's volume. Explain how this vacuole contributes to maintaining turgor pressure in the cell.

Answer Options

A. By secreting lignin into the cell wall, the vacuole reinforces structural rigidity, contributing to turgor pressure.
B. By producing ATP, the vacuole powers ion pumps that stiffen the cell wall, maintaining turgor pressure.
Correct Answer C. By storing water and solutes, the vacuole creates an osmotic gradient that draws water in, expanding the vacuole and pressing against the cell wall; this outward force is the turgor pressure that keeps the cell rigid.
D. By generating heat through metabolic reactions, the vacuole raises internal temperature, which increases turgor pressure.
Correct Answer
C
Correct Option:
By storing water and solutes, the vacuole creates an osmotic gradient that draws water in, expanding the vacuole and pressing against the cell wall; this outward force is the turgor pressure that keeps the cell rigid.

About This Question

This is Igcse Model Questions Vol1 2017 Biology Question 22. It is one of the objective questions from the 2017 Igcse Model Questions Vol1 Biology examination.

Difficulty level: Easy .

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