Question

Biology question, Would you please be able to compare and contrast in detail the assembly and dynamics of all of these?

1. actin

2. microtubules

3. and intermediate filaments

You can also include drawings if you want but please have an explanation more than 2 sentences underneath. Thank you!

Answer 1

ANS:

ACTIN FILAMENT VS MICROTUBULES VS INTERMEDIATE FILAMENTS

ASSEMBLY AND DYNAMICS	ACTIN FILAMENT	MICROTUBULES	INTERMEDIATE FILAMENTS
STRUCTURE	Solid which is made up of polymerized actin (F-actin)	Have hollow structure with walls that are made up of 13 protofilaments	Hollow with walls that are made up of 4-5 protofilaments
MONOMER UNITS	G-actin	α-tubulin and β-tubulin	Five types of protein from keratin family, depending upon cell type
DIAMETER (nm)	In the range of 7-9 nm	25 nm with 15 nm of lumen	10 nm
ATPase ACTIVITY	None	Present in dynein arms	None
MAIN FUNCTION	Main function includes: Muscle contraction Cytokinesis Protoplasmic streaming Cell shape changes Cell motility and cell division	Main function includes: Movement of chromosomes in cell division Movement of intracellular materials Contribution in maintaining cell shape Motility of Eukaryotes	Main function function includes: Cytoskeletal structural function in cytoplasm Integrate contractile units in muscle Formation of nuclear lamina