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प्रश्न
Draw a well labelled diagram of animal cell and mention one function of the main cell organelles.
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उत्तर
Following are the main cell organelles:
(i) Nucleus: It controls all the metabolic activities of a cell and regulates the cell cycle.
(ii) Endoplasmic reticulum: They provide skeletal framework to the cell and are concerned with the production of lipids and proteins.
(iii) Ribosomes: They play an important role in protein synthesis.
(iv) Mitochondria: They are the powerhouse of the cell as they provide energy to the cell by performing cellular respiration.
(v) Golgi apparatus: It is involved in the synthesis of cell wall, plasma membrane, and lysosomes.
(vi) Lysosomes: They are the cellular housekeepers and form a kind of garbage disposal system of the cell by removing worn out or damaged cellular organelles.
(vii) Vacuoles: They help in maintaining the osmotic pressure in the cell. and also in storing excess nutrients and molecules.
(viii) Peroxisomes: They carry out certain oxidative reactions (detoxification) and remove the toxic substances from the cell.
(ix) Centrosome: It helps in cell division in animal 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.
What are centrioles?
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 |
State whether the following statement is true (T) or False (F):
The cell wall is made of protein.
Put a tick mark (✓) against the correct alternative in the following statement:
The organelle that controls all activities in
State the difference between cytoplasm and protoplasm
Fill in the blanks:
The jelly-like fluid that surrounds the nucleus of a cell is called ______.
Fill in the blanks:
Golgi bodies are also called ______.
Write true or false for each statement. Rewrite the false statements correctly:
A mitochondrion is bound by two membranes
Identify the cellular structure with the help of the following clue:
It gives turgidity to the plant cells.
