Question

Which of the following statements about membrane-enclosed organelles is TRUE? Other than the nucleus, most organelles are small and thus, in a typical cell, only about 10% of a cell’s volume is occupied by membrane-enclosed organelles; the other 90% of the cell volume is the cytosol. The nucleus is the only organelle that is surrounded by a double membrane. In a typical cell, the area of the endoplasmic reticulum membrane far exceeds the area of plasma membrane. The nucleus is the only organelle that contains DNA.

Answer 1

The third option is the correct answer: In a typical cell, the area of the endoplasmic reticulum membrane far exceeds the area of plasma membrane.

Step-by-step explanation:

Eucaryotic cells contain intracellular membranes that enclose nearly half the cell's total volume in separate intracellular compartments called organelles.

Membrane-enclosed organelles are those that are bound by a phospholipid bilayer (the membrane), thereby allowing the organelles within the cell to control what goes in or out of it using a semi-permeable membrane.

The main types of membrane-enclosed organelles present in all eucaryotic cells are the endoplasmic reticulum, Golgi apparatus, nucleus, mitochondria, lysosomes, endosomes, and peroxisomes.

The ER encompasses approximately half of the total membrane area of an animal cell, thus, the area of the endoplasmic reticulum membrane far exceeds the area of plasma membrane.

Answer 2

The correct answer is: "In a typical cell, the area of the endoplasmic reticulum membrane far exceeds the area of plasma membrane".

Step-by-step explanation:

The endoplasmic reticulum (ER) is a membranous organelle that is in charge of the synthesis and transport of certain molecules. This organelle is composed of a folded lipidic bilayer that branches into interconnected tubules enclosing the lumen. This lumen occupies about 10% of the cell total volume.

More than half of the total membrane of eukaryotic cells is found in the ER. The ER´s membrane size also exceeds the total size of the plasmatic membrane.

The membrane of the endoplasmatic reticulum allows the selection of molecules that need to be transported from the cytoplasm to the organelle´s lumen. It is also a connection channel between the nucleus and the cytoplasm.