Indicate true (T) and false (F) statements below regarding receptor-mediated endocytosis of LDL particles. Your answer would be a four-letter string composed of letters T and F only, e.g. TTTF. ( ) LDL receptors are normally degraded in the lysosome along with their LDL ligands. ( ) LDL receptors that do not bind to extracellular LDL cannot be internalized in clathrin-coated vesicles. ( ) A mutation that impairs the attachment of an LDL receptor to a clathrin-coated pit would cause depletion of blood LDL levels. ( ) LDL receptors at the plasma membrane are usually concentrated in clathrin-coated pits.