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प्रश्न
Differentiate between Centrosome and centromere.
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उत्तर
| Centrosome | Centromere |
| It is an organelle of the animal cell. | It is a non-stainable part of the chromosome at which two chromatids join. |
| It contains two centrioles, which move towards the opposite poles and form spindle fibres during cell division | It provides attachment of spindle fibres during cell division. |
| They are responsible for the inheritance of characters from parents to off-spring. Chromosomes also help in cell division and control various metabolic activities. | It is the region of attachment of the sister chromatids and also the site of attachment to the spindle fibre. |
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संबंधित प्रश्न
The diagram given below represents a stage during cell division.
Study the same and answer the questions that follow:
- Identify whether it is a plant cell or an animal cell. Give a reason in support of your answer.
- Name the stage depicted in the diagram. What is the unique feature observed in this stage?
- Name the type of cell division that occurs during:
- Replacement of old leaves by new ones
- Formation of gametes
- What is the stage that comes before the stage shown in the diagram?
- Draw a neat, labelled diagram of the stage mentioned in (iv) above keeping the chromosome number constant.
With the help of suitable diagrams, explain the five stages of prophase-I of meiosis.
Choose the correct answer:
Nuclear membrane reappears in ____________
In which one of the following options the two stages of mitosis have been given in correct sequence?
Identify the stages of mitosis given below and label the figures.
Draw a well-labelled diagram to show the anaphase stage of mitosis in plant cells having four chromosomes.
Explain the Term Cell Diakinesis
Name the following:
Mitosis takes place in which cells.
Name the following:
Replacement of dead cells is accomplished by which process.
Name the Following
The stage when chromosomes arrange at the equator.
Name the Following
Name the stage during which nuclear membrane and nucleoli reappear.
Multiple Choice Question:
The nuclear membrane disappears in
Explain the following figure.
Identify the stage of mitosis from the below picture. List the chromosomal events in this stage.
Match List - I with List - II.
| List - I | List - II |
| A. Centromere | I. Mitochondrion |
| B. Cilium | II. Cell division |
| C. Cristae | III. Сell movement |
| D. Cell membrane | IV. Phospholipid Bilayer |
Choose the correct answer from the options given below:
