churn in American English. churnverb [ I/T ] [ I ] The water was churning and the boat was rocking. [ M ] The fish churned up the water when we threw them some food. [ T ] fig. Seeing the car ahead flip over churned his stomach.
Animal cells and plant cells both contain: 1  cell membrane. 2  cytoplasm. 3  nucleus. mitochondria.
The hereditary molecule that controls cellular function is DNA (deoxyribonucleic acid). DNA contains information for protein synthesis in cells. The characteristics of organisms depend on the chemical reactions that occur inside them. These reactions are catalyzed by enzymes, which are highly specific proteins.