IGCSE Biology Paper-1: Specimen Questions with Answers 135 - 135 of 208

Question 135

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Question

MCQ▾

In the given experiment sucrose solution is taken in funnel which is separated from water through semi-permeable membrane. Water will move into funnel till the equilibrium is reached.

Which processes is responsible for these changes?

Types of transport

Types of Transport

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Choices

Choice (4)
a.Osmosis
b.Diffusion
c.Active transport
d.Passive transport

Answer

a.

Explanation

  • Common experiment for demonstrating osmosis is thistle funnel experiment.
  • Thistle funnel experiment - In the experiment sucrose solution is taken in funnel which is separated from water through semi-permeable membrane. Water will move into funnel till the equilibrium is reached.
  • Osmosis is a kind of diffusion that plays a role in the movement of water into & within plants. In plants, it is the diffusion of water from higher concentration to lower concentration across a semi–permeable or differentially–permeable membrane.
  • The net direction and rate of osmosis depends on pressure and concentration gradient. A solution which can cause the osmotic entry of water into it is said to be osmotically active solution.
A Demonstartion of Osmosis Theory

A Demonstartion of Osmosis Theory

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