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Define the term deplasmolysis. 

Important Questions on The Fundamental Unit of Life

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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell
The movement of molecules during diffusion can be described through all of the following except - 
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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell

Glucose is the prime source of energy in our body. However it is stored in the form of glycogen in the muscle and liver of animals and in the form of starch in plants. As a result, every time a cell requires glucose, it must hydrolyze glycogen which is an energy-consuming process. Why does the cell store glycogen instead of glucose in free form?

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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell
If a cell is placed in hypertonic solution it will-
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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell
Eukaryotic cells contain several membrane-bound subcellular structures called Organelles. The vacuole is one such organelle found in both animal and plant
cells. Which of the following statement are true for vacuoles?
A. Contain cell sap.
B. Provide turgidity to the plant cell.
C. Plant cell vacuoles are smaller than animals cell vacuoles.
D. Vacuoles store amino acids, sugar, acids and contain protein.
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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell
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?
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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell
When the concentration of solutes differs on the two sides of a membrane permeable only to water, then -
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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell
In simple organisms, exchange of gases and excretion occurs through –
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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell
Which of the following is not a divisional stage
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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell
 A few dried raisins are put in water for some time and then placed inside the concentrated salt solution. What we observe is, raisins:
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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell
When a cell is placed in a strong salt solution. It shrinks, because:
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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell
DNA synthesis occurs in which stage of cell cycle.
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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell

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

Osmosis and Active Transport (Substances undergoing movement)

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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell
Which of the following is not found in prokaryotes except?
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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell
Choose one of the following alternative statements given below which correctly explains the process of osmosis.
MEDIUM
Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell
Cell organelles are embedded in
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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell
DNA of eukaryotes have
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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell
The eukaryotic chromosomes are made up of
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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell
The plasma membrane (pm) forms the boundary of lung cells. Which of the following statements is true for the pm?
A. Plasma membrane is a semipermeable membrane
B. Water moves across the pm by osmosis.
C. O2 and CO2 can cross the pm by diffusion.
D. Na+ and K+ ions can pass the pm by diffusion.
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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell
What will happen to cells of cyanobacteria if they are placed in purified water?
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Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell

Give biological explanations for the following:

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