Question:
What will happen if a de-shelled egg in a concentrated salt solution for 5 minutes?
Answer:
The egg shrinks because water passes out of the egg into saLt solution. The salt solution is more
concentrated than the inside of the egg. (Hypertonic)
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.
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 5.
Give examples of cells which are muti-nucleate (i.e. having many nuclei).
Q 6.
Identify cell organelle and write down its name:
Powehouse of cell
Q 7.
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 9.
Who discovered Golgi apparatus?
Q 10.
What are the function of nucleus?
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.
What is the energy currency of the cell called?
Q 13.
Which organelle of the cell in animals helps in osmregulation?
Q 14.
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 15.
Who discovered nucleus in the cell?
Q 17.
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 18.
Are plastids present in all cells? What are its types?
Q 19.
What are the components nucleus?
Q 20.
What is the function of nucleoplasm?
Q 21.
Name the cell organelles involved in synthesis, packaging and movement of protein (or other macromolecules) inside a cell.
Q 23.
In which year electron microscope was invented?
Q 24.
Define Passive Transport.
Q 25.
What are the conditions for osmosis?
Q 26.
Which cell organelle is called 'kitchen of plant'?
Q 27.
What are chromosomes?
Q 28.
Who discovered Virus?
Q 29.
Why is mitochondria absent in red blood cells?
Q 30.
Identify cell organelle and write down its name:
Detoxify drugs and poisons specially in liver cells.
Q 31.
Is plasma membrane permeable or selectively permeable?
Q 32.
What would happen if the plasma membrane ruptures or breaks down?
Q 33.
Who is known as Father of Biology?
Q 34.
What is osmoregulation?
Q 35.
Identify cell organelle and write down its name:
A network of flattened cavities surrounded by a membrane, which links with the nuclear membrane. Help in packaging proteins.
Q 36.
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 37.
Identify cell organelle and write down its name:
A structure involved in production of ribosomes, present inside a nucleus.
Q 38.
Name the book in which Robert Hooke published his observations about cork cells.
Q 39.
Name the two postulates of the cell theory.
Q 40.
Name the smallest cell in human body.
Q 41.
Name the longest cell in human body.
Q 42.
Give an example of anucleate cell i.e. cell without nucleus.
Q 43.
Who proposed fluid-mosaic model of cell or plasma membrane?
Q 44.
Define Osmosis. What are different types of osmosis? Give examples of osmosis.
Q 45.
What is plasmolysis?
Q 46.
Why are lysosomes known as suicide bags?
Q 47.
Will the temperature have any effect on the process of the osmosis?
Q 48.
Who is known as 'Father of Microscopy'?
Q 49.
Which cell organelle is called 'control center'?
Q 50.
Which cell organelle is called 'transport system'?
