OBJECTIVE LIFE SCIENCE
CELL BIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
mitochondria
|
|
|
nucleus
|
|
|
lysosome
|
|
|
endoplasmic reticulum (ER)
|
Detailed explanation-1: -Definition. Endoplasmic reticulum is a network of membranes inside a cell through which proteins and other molecules move. Proteins are assembled at organelles called ribosomes.
Detailed explanation-2: -From the ER membrane, they proceed to their final destination along the same pathway as that of secretory proteins: ER→ Golgi→ plasma membrane or lysosomes. These proteins are transported along this pathway as membrane components, however, rather than as soluble proteins.
Detailed explanation-3: -The endoplasmic reticulum (ER) plays a key role in the modification of proteins and the synthesis of lipids. It consists of a network of membranous tubules and flattened sacs. The discs and tubules of the ER are hollow, and the space inside is called the lumen.