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प्रश्न
Why is the cell called the structural and functional unit of life?
उत्तर
- The building blocks of all living things are cells. The structural unit of life is therefore the cell.
- Because of the particular arrangement of its membrane and cytoplasmic organelles, every cell has its own unique structure and function.
- Cells with this kind of organization are able to carry out essential processes like breathing, getting nutrients, getting rid of waste, making new proteins, etc. Thus, the fundamental functioning unit of living things is the cell.
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संबंधित प्रश्न
Complete the crossword with the help of clues given below.
Across
1. This is necessary for photosynthesis.
3. Term for component present in the cytoplasm.
6. The living substance in the cell.
8. Units of inheritance present on the chromosomes.
Down
1. Green plastids.
2. Formed by collection of tissues.
4. It separates the contents of the cell from the surrounding medium.
5. Empty structure in the cytoplasm.
7. A group of cells.
Where do the ribosomes get synthesized?
Draw a well labelled diagram of animal cell and mention one function of the main cell organelles.
Give functions.
Vacuole
Who gives me the colour? (Select the correct option)
| a. Red tomato | 1. Chlorophyll |
| b. Green leaf | 2. Carotene |
| c. Carrot | 3. Anthocyanin |
| d. Violet | 4. Lycopene |
Match the item in column 'A' with those in column 'B'.
| Column A | Column B |
| (a) Vacuoles | (i) Intracellular digestion |
| (b) Nucleolus | (ii) Respiratory enzymes |
| (c) Lysosomes | (iii) Covered by tonoplast |
| (d) Anthocyanin | (iv) Dissolved in the cytoplasm |
| (e) Cristae | (v) Forms RNA |
Mention any three differences between a living cell and a brick in a wall.
Put a tick mark (✓) against the correct alternative in the following statement:
Identify the part which contain pigment
Briefly describe the three essential basic parts of a cell
Identify the cellular structure with the help of the following clue:
It synthesizes the respiratory enzymes.
