Biology

The Fundamental Unit of Life

Question:

Are Viruses Prokaryotic or Eukaryotic?

Answer:

Neither of the two. Viruses are smaller than prokaryotic cells. A virus is considered as a simple nucleic acid surround by a protein coat. They act as non-living and become living on finding a suitable host.
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The Fundamental Unit of Life

Q 1.

Who proposed fluid-mosaic model of cell or plasma membrane?

Q 2.

What are chromosomes?

Q 3.

What are the components nucleus?

Q 4.

Name the smallest cell in human body.

Q 5.

Will the temperature have any effect on the process of the osmosis?

Q 6.

When chromosomes are visible in the nucleus?

Q 7.

Name the cell organelles which their own DNA and Ribosomes.

Q 8.

Name the biggest cell in human body.

Q 9.

What is the full form of DNA and RNA?

Q 10.

What are different types transport of components across cell membrane?

Q 11.

What is diffusion?

Q 12.

What is osmoregulation?

Q 13.

Who expanded cell theory by suggesting that all cells arise from pre-existing cells?

Q 14.

Name the cell type that have internal membranes which compartmentalize their functions.

Q 15.

Identify cell organelle and write down its name:
Present in some animal cells, help in locomotion.

Q 16.

Identify cell organelle and write down its name:
Powehouse of cell

Q 17.

Identify cell organelle and write down its name:
A structure involved in production of ribosomes, present inside a nucleus.

Q 18.

Name the world's smallest cell.

Q 19.

Define Osmosis. What are different types of osmosis? Give examples of osmosis.

Q 20.

What is the function of nucleoplasm?

Q 21.

Identify cell organelle and write down its name:
A fluid-filled space surrounded by a membrane. Generally contains salts and sugars in plants.

Q 22.

What are the function of nucleus?

Q 23.

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 24.

Which organ of the plant body helps in osmoregulation?

Q 25.

What is cytoskeleton?

Q 26.

What is plasmolysis?

Q 27.

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 28.

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 29.

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 30.

Identify cell organelle and write down its name:
Digestive organelle where macromolecules are hydrolyzed

Q 31.

Identify cell organelle and write down its name:
Detoxify drugs and poisons specially in liver cells.

Q 32.

Define Cell

Q 33.

Who coined the term 'protoplasm'?

Q 34.

Name the longest cell in human body.

Q 35.

Give an example of anucleate cell i.e. cell without nucleus.

Q 36.

What do you mean by Endocytosis? How does an Amoeba obtain its food?

Q 37.

Who is known as Father of Biology?

Q 38.

Who discovered Golgi apparatus?

Q 39.

What is the energy currency of the cell called?

Q 40.

What are centrosomes? What functions do they perform?

Q 41.

Name the cell organelles which change energy from one form to another.

Q 42.

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 43.

Identify cell organelle and write down its name:
Called 'suicide bags' of a cell.

Q 44.

In which year electron microscope was invented?

Q 45.

Name the book in which Robert Hooke published his observations about cork cells.

Q 46.

Who discovered nucleus in the cell?

Q 47.

Name the largest cell?

Q 48.

What is the plasma membrane composed of?

Q 49.

Is plasma membrane permeable or selectively permeable?

Q 50.

Which organelle of the cell in animals helps in osmregulation?