The organelle shown below is found in all cells but is most numerous in cells requiring a large amount of energy (e.g., liver cells). What is the name of this organelle?
A) Lysosome
B) Golgi apparatus
C) Rough endoplasmic reticulum
D) Mitochondrion
E) Chloroplast

Question

The organelle shown below is found in all cells but is most numerous in cells requiring a large amount of energy (e.g., liver cells). What is the name of this organelle? 
A) Lysosome 
B) Golgi apparatus 
C) Rough endoplasmic reticulum 
D) Mitochondrion 
E) Chloroplast

Quizplus · Accepted Answer

The organelle shown is the mitochondrion, which is responsible for producing ATP, the energy currency of cells. Liver cells require a large amount of energy for their functions, including detoxification and metabolism of nutrients, resulting in a high number of mitochondria. Lysosomes are involved in breaking down waste materials, the Golgi apparatus is involved in modifying and sorting proteins, the rough endoplasmic reticulum is involved in protein synthesis, and chloroplasts are found only in plant cells and are involved in photosynthesis.

The Organelle Shown Below Is Found in All Cells but Is