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Without any qualitative test outside the Visking tubing, to investigate the diffusion of starch through a membrane following things can be used:

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Important Questions on Cell Biology

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Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells
What are the components of the transport system in highly organized plants? How are water and minerals transported in plants? What is the role of transpiration in transporting water and minerals in plants?
MEDIUM
Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells
Explain the following terms:
Diffusion
EASY
Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells
Identify the incorrect statements among the following.
A) Epidermal cells are parenchymatous and have small amount of cytoplasm
B) Gymnosperms have vessels in their xylem
C) In bicollateral vascular bundle, phloem is present on either side of cortex
D) Root endodermal cells have deposition of water impermeable, suberin as casparian strips
EASY
Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells
The xylem in plants are responsible for
EASY
Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells
A biology teacher placed a hen’s egg in three different solutions:
 Solution A: Pure water,
 Solution B: saturated salt solution,
 Solution C: Hydrochloric acid
 The sequence of treatments and the ensuring probable effect on the egg are listed below:
 I. A - B - C -Remains unchanged
 II. B - C - A - Swells
 III. C - A - B - Shrinks
 IV. B - A - C - Loses salts
 Based on the above sequence to treatment which one of the options will be correct?
EASY
Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells
The living component of xylem tissue is
EASY
Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells
The movement of molecules during diffusion can be described through all of the following except - 
EASY
Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells

Which of the following is not a component of phloem?

EASY
Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells
 A few dried raisins are put in water for some time and then placed inside the concentrated salt solution. What we observe is, raisins:
EASY
Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells
When a cell is placed in a strong salt solution. It shrinks, because:
EASY
Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells
Which one of the following will have maximum diffusion pressure?
MEDIUM
Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells

Differentiate between the following pairs on the basis of what is mentioned in the brackets:

Osmosis and Active Transport (Substances undergoing movement)

EASY
Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells
What will happen to cells of cyanobacteria if they are placed in purified water?
EASY
Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells

Give biological explanations for the following:

Plants growing in fertilized soil are often found to wilt if the soil is not adequately watered

MEDIUM
Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells
Describe the mechanism of osmosis. Give its importance.
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Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells
Mass of raisins before and after placing them in pure water for some time is 20 gm and 25 gm. The percent water absorbed will be calculated by the formula
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Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells
Write a note on plasmolysis.
MEDIUM
Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells
Following are a few definitions of osmosis. Read carefully and select the correct definition.
EASY
Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells
Write down four steps of the procedure of the experiment to calculate the percentage of water absorbed by the raisins in the laboratory.
MEDIUM
Biology>Cell : The Structural Unit>Cell Biology>Ultrastructure of Cells
When RBC's become shrunken and crenated in a given solution, the solution is