Muscle cells have an abundant, modified smooth ER called the sarcoplasmic reticulum.

The release and reuptake of Ca2+ by the sarcoplasmic reticulum trigger myofibril contraction and relaxation, respectively

TLS Online TPP Program

#Id: 8100

#Section 2: General Biology

Sphingolipids contain a single fatty acid, in amide linkage to the sphingosine backbone.

TLS Online TPP Program

#Id: 8951

#Section 3: Genetics, Cellular and Molecular Biology

TLS Online TPP Program

#Id: 7736

#Section 2: General Biology

The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).

TLS Online TPP Program

#Id: 8179

#Section 3: Genetics, Cellular and Molecular Biology

Peroxisomes contain oxidative enzymes: catalase and urate oxidase.

TLS Online TPP Program

#Id: 8183

#Section 3: Genetics, Cellular and Molecular Biology

β oxidation 

A major function of the oxidation reactions is the breakdown of fatty acid molecules.