Write true or false and please explain

1. In secretory cells, the constitutive and regulatory pathways of exocytosis diverge at the cis Golgi network. —————— ( ) ( )
2. Many proteins are posttranslationally glycosylated at tyrosine residues in the ER. ————————————————- ( ) ( )
3. Cells import LDL molecules exclusively through pinocytosis. ————————————————————————- ( ) ( )
4. Cells recycle LDL receptors from lysosome to the plasma membrane. —————————————————————– ( ) ( )
5. Phagosomes fuse with late endosome. —————————————————————————————————— ( ) ( )
6. If a Sec mutant showed an accumulation of newly synthesized proteins at ER, then the Sec gene is likely a component of vesicle-budding machinery of trans-Golgi network. ———————————— ( ) ( )
7. A signal recognition particle is a single pass trans-membrane protein of the ER membrane. —————————————- ( ) ( )