CENTRIOLE AND CENTROSOME

Question 1

Who discovered it ?

Answer 1

It was discovered by T. Boveri

Question 2

What is centriole ?

Answer 2

It is the non-membranous structure found in cytoplasm

Question 3

In which organism they are present ?

Answer 3

They are found in the animals and the lower plants(like algae) but they are absent in the higher plants.

Question 4

What is the structure of the centriole ?

Answer 4

It is hollow microcylindrical made up of microtubules.

Each centriole has 2 subunits and both subunits are present perpendicular to each other.

They always occur in pair.

Question 5

What is the shape of the centriole ?

Answer 5

It is cart wheel like has 9+0 arrangement of microtubule

Question 6

Give a brief description of the centriole structure

Answer 6

1. 9 sets of triplet microtubules in the periphery and the no microtubule in the center
   Total microtubule - 27 (9 set each triplet = 9*3 = 27)
2. The microtubule of the adjacent set are joined together by A-C or C-A linker
3. The peripheral microtubule sets are joined with central hub by radial spokes (9 in number)
4. In the periphery , peri-centriolar satellite \ massules \ MTG(micro tubule generator) that forms new centriole

Question 7

LEARN THE DIAGRAM O THE CENTRIOLE FROM THE NOTES

Answer 7

DONE :D

Question 8

What is the function of the centriole ?

Answer 8

1. Helps in the cell division

2. Formation of basal body \ basal granules \ blepharoplast (forms the cytoskeleton of the cilia and flagella)