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प्रश्न
Distinguish between the following pairs of terms :
Centrosome and chromosome
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उत्तर
| Centrosome | Chromosome | ||
| (i) | It is a clear area of cytoplasm close to the nucleus, from which spindle fibres develop during cell division. | (i) | Chromosomes carry hereditary information or genes, which transmit genetic characters from parents to offspring. |
| (ii) | A centrosome is found only in an animal cell. | (ii) | Chromosomes are found in the nucleus of both animal and plant cells. |
| (iii) | These are found outside the nucleus. | (iii) | These are found inside the nucleus. |
| (iv) | It consists of centrioles and centrospheres. | (iv) | It consists of nucleic proteins and nucleic acids |
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संबंधित प्रश्न
Cells are the basic structural units of living organisms’. Explain
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.
Name the following
(a) The cell organelle which synthesizes protein.
(b) The type of plastid which stores food.
Who am I?
I am ATP producing factory
What would have happened? If .........
There had been no differences between mitochondria and plastids.
Who is odd man among us? Give reason.
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 |
Name the part of the cell concerned with the following :
Synthesis of proteins
Name the part of the cell concerned with the following :
Initiation of cell division
State whether the following statement is true (T) or False (F):
All animal cells contain a cell wall.
State whether the following statement is true (T) or False (F):
Centrosome occurs in animal cells.
Distinguish between the following pair of terms:
Protoplasm and cytoplasm
Distinguish between the following pairs of science :
Cell wall and cell membrane
State the major function of the following :
Lysosomes
Fill in the blanks:
______ membrane is a selectively permeable membrane.
Fill in the blanks:
Golgi bodies are also called ______.
Write true or false for each statement. Rewrite the false statements correctly:
The nuclear membrane encloses a colourless, dense fluid called nucleoplasm
Write true or false for each statement. Rewrite the false statements correctly:
Chromoplasts are the kitchen of the cell
Write true or false for each statement. Rewrite the false statements correctly:
Vacuoles are filled with a fluid called nucleoplasm
Organelle without a cell membrane is
