Skip to main content

Cytoskeleton

Cytoskeleton
Cytosol contains cytoskeletal fabrics formed of microtubules, microfilaments and intermediate filaments, all constituting cytoskeleton.

Composition

Cytoskeleton is made by different proteins. The main proteins that are present in cytoskeleton are tubulin, actin, myosin, tropomyosin and others, which are also found in muscles.

Types of Cytoskeletal Fibers

(i) Microtubules
  • These are long, unbranched and slender tubulin proteinstructures.
  • Their important role is in assembly and disassembly of the spindle structure during mitosis. They are also involved in formation of cilia, flagella andbasal bodies.
(ii) Microfilaments
  • These are more slender cylinders made up of contractile actin protein, linked to inner face of the plasma membrane.
  • They are involved in internal cell motion e.g. movement of cyclosis and amoeboid movement.
(iii) Intermediate Filaments

  • They have diameter in between those of microtubules and microfilaments.
  • They play role in maintenance of cell shape and integration of cellular compartment.

Comments

Post a Comment

Popular posts from this blog

Mr chips important short questions.

Chapter#1 Question # 1:How does a person spend his time in old age after retirement? Answer : After retirement when a person becomes old, he has nothing to do. His time seems to pass like lazy cattle moving across a landscape(valley). Question # 2:Why did Chips keep on adjusting his timetable according to the school bells even after the retirement? Answer : After spending more than forty three(43) years at Brookfield, it was not possible for Chips to break his ties with school. He began to live across the road and Mrs. Wickets. That's why it was possible for Chips to keep on adjusting his timetable according to the school bells. Question # 3:How did Chips voice sound in old age? Answer : Although Chips had become old yet he did not loose the zeal and zeast for the life. So his voice remained resonant and lively even in his old age. Question # 4:What did Chips do before going to the bed? Answer : Chips was spending a pleasant and placid time at Mrs. Wickets after his retirem...
Post a Comment
Read more

DISPLACMENT, DISTANCE, SPEED, VELOCITY AND ACCELERATION

Displacement: Shortest distance between two points is called displacement                                                                OR The displacement is a change in the position of body form its initial position to final position Unit:  SI unit of displacement is metre (m)                    Dimension:             The dimension of displacement is [L] VELOCITY: The time rate of change of displacement is known as velocity. It is a vector quantity. Its direction is along the direction of displacement. Mathematically...
Post a Comment
Read more

DEFINING CHARACTERISTICS (DEFINITION)

Sometimes the definition of some word is written and the students are asked to find the word whose definition has been given. Example: 1.  The chemist tried to produce _____ that could cure all the diseases.       A) symptom                                                    C) medicine                      B) injection                                                       D) panacea More Examples: 2.  John was a ________________ , who does not  believe that any t...
Post a Comment
Read more