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प्रश्न
Define the term cell? Also, describe types of cells.
उत्तर
Cell is the smallest structural and functional unit of all living organisms and is a membrane bound structure enclosing the protoplasm.
The two types of cells are:
- Prokaryotic cells – These cells lack a well-organised nucleus and membrane bound organelles. They are usually found in unicellular organisms, which are referred to as prokaryotes. Examples of prokaryotes are bacteria and blue-green algae.
- Eukaryotic cells – These cells possess a well-organised nucleus and membrane bound organelles. Organisms made up of eukaryotic cells are called eukaryotes. Examples of eukaryotes are plants and animals.
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संबंधित प्रश्न
Fill in the blanks:
Organisms which are made up of a single cell are called ______ organisms.
Why was the invention of the microscope so important to the study of living beings?
What was the contribution of the following to our knowledge of cells?
Schwann
Describe the structure of the chromosome in brief.
Fill in the blank with a suitable word:
Cell ______ was proposed by Schleiden and Schwann.
Match the items in column A with the appropriate items in column B:
| column A | column B |
| 1. Platform or workplace for the synthesis of proteins | a. Golgi complex |
| 2. A powerhouse of cells | b. Ribosomes |
| 3. Help in the formation of cell plate during cell division | c. Chloroplast |
| 4. Site for photosynthesis | d. Mitochondria |
| 5. Control tower of cell | e. Chromosomes |
| 6. A structure bearing genes | f. Nucleus |
Who studied the cell first?
Name the longest cell.
What is difference between us?
Prokaryotic cell and eukaryotic cell.
Answer the following question.
Why is the cell called the structural and functional unit of life?
