Indicate true (T) and false (F) statements below regarding the cell cytoskeleton. Your answer would be a four-letter string composed of letters T and F only; e.g. TTFF. ( ) The three major building blocks of cytoskeletal filaments can bind to and hydrolyze nucleotides. ( ) The building blocks of microfilaments and microtubules are globular proteins, whereas those of intermediate filaments are themselves filamentous proteins. ( ) Intermediate filaments are typically thicker than actin filaments but thinner than microtubules. ( ) Plant cells lack microtubules.