(a) Describe the structure of centriole. ; (b). Point out the difference between Golgi apparatus of plant and animal cells
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Explanation:
a)A centriole is a small set of microtubules arranged in a specific way. There are nine groups of microtubules. When two centrioles are found next to each other, they are usually at right angles. The centrioles are found in pairs and move towards the poles (opposite ends) of the nucleus when it is time for cell division.
b)Plant and animal cells are very similar because they are both eukaryotic cells. They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes. Plant cells can be larger than animal cells.
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First of all let’s understand what is ‘CENTROSOME’.
- It’s a Non-membrane bound, cylindrical, rod shaped, microtubular structure.
- It’s found only in animal cell.
- 2 centrioles are present in one body.
- Long axis of one centriole is perpendicular to the long axis of another.
CENTRIOLES :
As shown in the diagram of the inner structure of centriole, you can see those ball like structures.
Those are nothing but microtubules made up of a protein called Tubulin.
These microtubules are present in a pair of three.
There are 9 such pairs present in a circular manner.
And those thread like structures connecting the microtubules to each other are known as ‘Linkers’.
At the centre there’s a protein part called ‘Central hub’.
The 9 triplets of microtubules are attached to the Central Hub by another thread like structures called ‘Radial Spokes’.
Such an arrangement of microtubules is known as (9 + 0) arrangement.
GOLGI APPARATUS :
The difference is that,
Animals cells tend to have fewer and larger Golgi apparatus
Where as Plant cells can have as many as several hundreds of such Golgi apparatus but the smaller versions of it.
- It’s a Non-membrane bound, cylindrical, rod shaped, microtubular structure.
- It’s found only in animal cell.
- 2 centrioles are present in one body.
- Long axis of one centriole is perpendicular to the long axis of another.
CENTRIOLES :
As shown in the diagram of the inner structure of centriole, you can see those ball like structures.
Those are nothing but microtubules made up of a protein called Tubulin.
These microtubules are present in a pair of three.
There are 9 such pairs present in a circular manner.
And those thread like structures connecting the microtubules to each other are known as ‘Linkers’.
At the centre there’s a protein part called ‘Central hub’.
The 9 triplets of microtubules are attached to the Central Hub by another thread like structures called ‘Radial Spokes’.
Such an arrangement of microtubules is known as (9 + 0) arrangement.
GOLGI APPARATUS :
The difference is that,
Animals cells tend to have fewer and larger Golgi apparatus
Where as Plant cells can have as many as several hundreds of such Golgi apparatus but the smaller versions of it.
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