Question:
What are chromosomes?
Answer:
Chromosomes are compact rod like bodies, which are formed at the time of cell division from chromatin material. They are made up of DNA and carry genes (unit of inheritance).
The Fundamental Unit of Life
Q 1.
Who proposed fluid-mosaic model of cell or plasma membrane?
Q 2.
Name the biggest cell in human body.
Q 3.
What are chromosomes?
Q 4.
Identify cell organelle and write down its name:
Present in some animal cells, help in locomotion.
Q 5.
Who expanded cell theory by suggesting that all cells arise from pre-existing cells?
Q 6.
What are the components nucleus?
Q 7.
Name the cell organelles which their own DNA and Ribosomes.
Q 8.
What is osmoregulation?
Q 9.
When chromosomes are visible in the nucleus?
Q 10.
What is the full form of DNA and RNA?
Q 11.
Name the cell type that have internal membranes which compartmentalize their functions.
Q 12.
Identify cell organelle and write down its name:
A fluid-filled space surrounded by a membrane. Generally contains salts and sugars in plants.
Q 15.
Identify cell organelle and write down its name:
A partially permeable layer prevents cell contents from escaping controls what substances enter and leave the cell. Identify?
Q 16.
What is the function of nucleoplasm?
Q 17.
Who coined the term 'protoplasm'?
Q 18.
Who is known as Father of Biology?
Q 19.
What are centrosomes? What functions do they perform?
Q 20.
Who discovered Virus?
Q 21.
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 22.
Identify cell organelle and write down its name:
Digestive organelle where macromolecules are hydrolyzed
Q 23.
Identify cell organelle and write down its name:
Called 'suicide bags' of a cell.
Q 24.
Name the longest cell in human body.
Q 25.
Which organelle of the cell in animals helps in osmregulation?
Q 26.
Name the cell organelles which change energy from one form to another.
Q 27.
Identify cell organelle and write down its name:
Powehouse of cell
Q 28.
Name the smallest cell in human body.
Q 29.
What are the function of nucleus?
Q 30.
Identify cell organelle and write down its name:
Detoxify drugs and poisons specially in liver cells.
Q 31.
Will the temperature have any effect on the process of the osmosis?
Q 32.
Are there any exceptions to cell theory proposed by Schleiden & Schwann and Virchow? If yes, what are those?
Q 33.
Why is mitochondria absent in red blood cells?
Q 34.
Identify cell organelle and write down its name:
A structure involved in production of ribosomes, present inside a nucleus.
Q 35.
Who proposed the cell theory?
Q 36.
Name the two postulates of the cell theory.
Q 37.
Give examples of cells which are muti-nucleate (i.e. having many nuclei).
Q 38.
What will happen if a de-shelled egg in a concentrated salt solution for 5 minutes?
Q 39.
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 40.
Which organ of the plant body helps in osmoregulation?
Q 41.
Are Viruses Prokaryotic or Eukaryotic?
Q 42.
Which cell organelle is called 'transport system'?
Q 43.
Identify cell organelle and write down its name:
Jelly like substance containing particles and other organelles. What is it?
Q 44.
What are different types transport of components across cell membrane?
Q 45.
Define Passive Transport.
Q 46.
Who discovered Golgi apparatus?
Q 47.
Which cell organelle is known as 'protein factory'?
Q 48.
What is the energy currency of the cell called?
Q 49.
What are the conditions for osmosis?
Q 50.
Identify cell organelle and write down its name:
Contains green colour pigment, traps light energy. Present in some plant cells.
