The figure below shows how differential centrifugation can be used to isolate four subcellular fractions.Which fraction corresponds to the membrane fraction?
A) A
B) B
C) C
D) D

Question

The figure below shows how differential centrifugation can be used to isolate four subcellular fractions.Which fraction corresponds to the membrane fraction? 
A) A 
B) B 
C) C 
D) D

Quizplus · Accepted Answer

The membrane fraction consists of cellular membranes, including plasma membranes and organelle membranes such as endoplasmic reticulum, Golgi apparatus, and mitochondria. These membrane structures are relatively dense and have a high lipid content, which causes them to sediment at a higher speed during centrifugation. In the given figure, Fraction C contains most of the membrane structures and has a relatively high density compared to the other fractions. Therefore, C is the best choice for the membrane fraction.

The Figure Below Shows How Differential Centrifugation Can Be Used