【单选题】UNIT 3 PART 2 SECTION B TASK 3 There are ten short dialogues and monologues about dreams and reality. Listen carefully, and choose the best answer to each question. (Quetstion 9 to 18 ) Listen to...
【多选题】What is the structure of the Golgi apparatus?
A.
The Golgi apparatus is usually located near the cell nucleus, and in animal cells it is often close to the centrosome, a small cytoskeletal structure near the cell center. The Golgi apparatus consists of a collection of flattened, membrane-enclosed sacs called cisternae, which are piled like stacks of pita bread.
B.
Each stack contains 3–20 cisternae, and the number of Golgi stacks per cell varies greatly depending on the cell type: some cells contain one large stack, while others contain hundreds of very small ones.
C.
Each Golgi stack has two distinct faces: an entry, or ci s , face and an exit, or trans , face. The ci s face is adjacent to the ER, while the trans face points toward the plasma membrane. The outermost cisterna at each face is connected to a network of interconnected membranous tubes and vesicles.
D.
Soluble proteins and pieces of membrane enter the ci s Golgi network via transport vesicles derived from the ER.