Question

Which of the following statements about membrane-enclosed organelles is true 

A. The nucleus is the only organelle in animal cells enclosed by a double membrane. 

B. The surface area of the ER far exceeds that of the plasma membrane of a typical cell. 

C. All of these statements are true 

D. The Golgi apparatus descends from a bacterial origin via endosymbiosis. 

E. Most proteins are synthesized in the organelles in which they reside. 

F. None of these statements are true

Answer 1

The correct option is

B. The surface area of the ER far exceeds that of the plasma membrane of a typical cell.

The membrane of ER is the location for many important cellular activities like making lipids, folding proteins and storing important molecules until they are needed. So, increased surface area of ER is crucial in its functions.

Mitochondria, Chloroplasts, Endoplasmic Reticulum, Golgi Body, and Nucleus are the double membrane bound organelles in cells. The endosymbiotic hypothesis suggests that mitochondria and chloroplasts are descended from bacteria. Most proteins are synthesized in the cytoplasm in ribosomes and are translocated to various organelles in which they reside.