Question:
Name the world's smallest cell.
Answer:
It is a type of bacteria called Mycoplasma about a diameter of 10?m (micrometre).
The Fundamental Unit of Life
Q 1.
Which cell organelle is known as 'protein factory'?
Q 2.
Identify cell organelle and write down its name:
A tough, non-living layer, it prevents plant cells from bursting, freely permeable
Q 3.
Is plasma membrane permeable or selectively permeable?
Q 4.
Are plastids present in all cells? What are its types?
Q 5.
Which cell organelle is called 'kitchen of plant'?
Q 6.
Which of the following cell is better candidate to study lysosomes?
(a) White Blood Cell
(b) Muscle Cell
Q 7.
What is the full form of DNA and RNA?
Q 8.
Name the two postulates of the cell theory.
Q 9.
What are chromosomes?
Q 10.
What is the plasma membrane composed of?
Q 12.
Name the sac like structure which form the grana?
Q 13.
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 14.
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 15.
Who observed the cells the first time?
Q 16.
What are different types transport of components across cell membrane?
Q 17.
What are the function of nucleus?
Q 18.
Give an example of anucleate cell i.e. cell without nucleus.
Q 19.
Name the biggest cell in human body.
Q 20.
Will the temperature have any effect on the process of the osmosis?
Q 21.
Why is mitochondria absent in red blood cells?
Q 23.
Name the smallest cell in human body.
Q 24.
What are the conditions for osmosis?
Q 25.
Identify cell organelle and write down its name:
Digestive organelle where macromolecules are hydrolyzed
Q 26.
Who proposed the cell theory?
Q 27.
Who coined the term 'protoplasm'?
Q 28.
Who proposed fluid-mosaic model of cell or plasma membrane?
Q 29.
Identify cell organelle and write down its name:
Powehouse of cell
Q 30.
Which organ of the plant body helps in osmoregulation?
Q 31.
Identify cell organelle and write down its name:
Called 'suicide bags' of a cell.
Q 32.
Who expanded cell theory by suggesting that all cells arise from pre-existing cells?
Q 33.
Who is known as 'Father of Microscopy'?
Q 34.
Which cell organelle is called 'control center'?
Q 35.
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 36.
Identify cell organelle and write down its name:
Detoxify drugs and poisons specially in liver cells.
Q 37.
In which year electron microscope was invented?
Q 38.
Are there any exceptions to cell theory proposed by Schleiden & Schwann and Virchow? If yes, what are those?
Q 39.
What is the thickness of cell membrane?
Q 40.
Name the cell type that have internal membranes which compartmentalize their functions.
Q 41.
Name the longest cell in human body.
Q 42.
Define Passive Transport.
Q 43.
Define Osmosis. What are different types of osmosis? Give examples of osmosis.
Q 44.
What is plasmolysis?
Q 45.
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 46.
Who is known as Father of Biology?
Q 47.
When chromosomes are visible in the nucleus?
Q 48.
Are Viruses Prokaryotic or Eukaryotic?
Q 49.
Name the cell organelles which their own DNA and Ribosomes.
Q 50.
Identify cell organelle and write down its name:
Contains green colour pigment, traps light energy. Present in some plant cells.
