Question:
What is plasmolysis?
Answer:
When a living plant cell loses water placed in hypertonic solution, the plant cell shrinks away from the cell wall. This process is called plasmolysis.Plants with plasmolysed cells wilt.
The Fundamental Unit of Life
Q 1.
Name the sac like structure which form the grana?
Q 2.
Identify cell organelle and write down its name:
Called 'suicide bags' of a cell.
Q 3.
What is the full form of DNA and RNA?
Q 4.
What are the function of nucleus?
Q 5.
Identify cell organelle and write down its name:
Slipper or oval shaped, its inner membrane is multi-folded and has lot of chemical activity
Q 6.
Identify cell organelle and write down its name:
Membrane-bound vesicles arranged approximately parallel to each other. Active in synthesis, modification, sorting, and Secretion of cell products
Q 7.
Who discovered nucleus in the cell?
Q 8.
Give examples of cells which are muti-nucleate (i.e. having many nuclei).
Q 10.
Who discovered Golgi apparatus?
Q 11.
Identify cell organelle and write down its name:
A tough, non-living layer, it prevents plant cells from bursting, freely permeable
Q 12.
Identify cell organelle and write down its name:
Powehouse of cell
Q 13.
Put dried raisins in plain water and leave them for some time. Then place them in concentrated solution of sugar or salt. What do you observe in both cases?
Q 14.
What is the energy currency of the cell called?
Q 15.
What are the components nucleus?
Q 16.
What is the function of nucleoplasm?
Q 17.
Why can't single cells grow very large? Or Big organisms like human beings are multi-cellular? Why can't such big organisms be a single large cell?
Q 18.
Name the cell organelles involved in synthesis, packaging and movement of protein (or other macromolecules) inside a cell.
Q 20.
Give an example of anucleate cell i.e. cell without nucleus.
Q 21.
What are the conditions for osmosis?
Q 22.
Which organelle of the cell in animals helps in osmregulation?
Q 23.
Identify cell organelle and write down its name:
Detoxify drugs and poisons specially in liver cells.
Q 24.
In which year electron microscope was invented?
Q 25.
Define Passive Transport.
Q 27.
Are plastids present in all cells? What are its types?
Q 28.
Which cell organelle is called 'kitchen of plant'?
Q 29.
What are chromosomes?
Q 30.
Who discovered Virus?
Q 31.
Why is mitochondria absent in red blood cells?
Q 32.
Is plasma membrane permeable or selectively permeable?
Q 33.
What would happen if the plasma membrane ruptures or breaks down?
Q 34.
What is osmoregulation?
Q 35.
Which cell organelle is called 'control center'?
Q 36.
Are there any exceptions to cell theory proposed by Schleiden & Schwann and Virchow? If yes, what are those?
Q 37.
Identify cell organelle and write down its name:
Jelly like substance containing particles and other organelles. What is it?
Q 38.
Identify cell organelle and write down its name:
Appear brown dots either present freely in cell or bound to a membrane and make proteins.
Q 39.
Identify cell organelle and write down its name:
Thread like structures made up of in DNA and proteins. Converts to chromosomes when cell is dividing.
Q 40.
Identify cell organelle and write down its name:
A structure involved in production of ribosomes, present inside a nucleus.
Q 41.
Name the book in which Robert Hooke published his observations about cork cells.
Q 42.
Name the smallest cell in human body.
Q 43.
Name the longest cell in human body.
Q 44.
Define Osmosis. What are different types of osmosis? Give examples of osmosis.
Q 45.
Why are lysosomes known as suicide bags?
Q 46.
Who is known as Father of Biology?
Q 47.
When chromosomes are visible in the nucleus?
Q 48.
Which cell organelle is called 'transport system'?
Q 49.
Name the cell organelles which change energy from one form to another.
Q 50.
Which of the following cell is better candidate to study lysosomes?
(a) White Blood Cell
(b) Muscle Cell
