1-Describe the mechanisms of import used to transport soluble proteins into the following membrane-enclosed organelles: (1) Mitochondria and (2)...

1-Describe the mechanisms of import used to transport soluble proteins into the following membrane-enclosed organelles: (1) Mitochondria and (2) Endoplasmic Reticulum.

2-What does it mean to say that signal sequences on a protein are both necessary and sufficient to direct a protein to a particular destination? How can this be determined experimentally?

3-How are nuclear proteins imported from the cytosol into the nucleus through nuclear pores using nuclear import receptors and the Ran GTPase?