For each of the following, decide whether it applies to actin filaments, intermediate filaments, and/or microtubules....
- For each of the following, decide whether it applies to actin filaments, intermediate filaments, and/or microtubules. NOTE: there may be multiple answers for each statement.
- Found in the nucleus and cytoplasm
ANSWER:
- Involved in the transport of vesicles and organelles
ANSWER:
- Associate with proteins that help adhere cells to the extracellular matrix
ANSWER:
- Their stability is influenced by nucleotide hydrolysis
ANSWER:
- Directly involved in phagocytosis
ANSWER:
- Can associate into bundles with the help of other proteins
ANSWER:
Homework Answers
1- Found in the nucleus and cytoplasm
ANSWER- All 3 protein filaments, microtubules, intermediate filaments, and microfilaments are found in the cytoplasm and near the nucleus.
2-Involved in the transport of vesicles and organelles.
ANSWER- Microtubules:- These are the thickest cytoskeleton and are involved in the intracellular translocation of vesicles and organelles.
3- Associate with proteins that help adhere cells to the extracellular matrix
ANSWER- Actin filaments- They associate with proteins aiding adherence to the extracellular matrix.
intermediate Filaments- In hemidesmosomes the integrin proteins link ntermediate filament with the extracellular matrix.
Microtubules - They are the structural component of cilia and flagella which are the locomotory organ used for adherence
Hence all the 3 cytoskeletons are associated with protein to aid adherence to the extracellular matrix
4- Stability is measure by hydrolysis of a nucleotide
ANSWER- Microtubules and actin filaments -These two polymers are assembled with energy expenditure.
5-Directly involved in phagocytosis
ANSWER- The actin cytoskeleton is directly involved in the phagocytosis during signal transduction.
6-Can associate into bundles with the help of other proteins.
ANSWER - All the three microtubules, intermediate filament, and actin filament can associate into bundles with the help
of other proteins.
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