One purpose that membrane-bound organelles serve is to allow the isolation and concentration of enzymes and reactants within a small space. This enables chemical reactions in a cell to occur faster and with greater effic... More »

Organelles are structures within a cell that have specific functions; membrane-bound organelles are organelles protected by a single or double plasma membrane. Mitochondria, lysosomes, the endoplasmic reticulum and the G... More »

The membrane-bound structure that contains digestive enzymes is the lysosome. Lysosomes contain enzymes that break down organic macromolecules such as carbohydrates, fats and proteins. All animal cells contain lysosomes,... More »

The four main functions of the plasma membrane include identification, communication, regulation of solute exchange through the membrane, and isolation of the cytoplasm from the external environment. The plasma membrane ... More »

Lysosomes are organelles bound by a single membrane. Lysosomes produce hydrolytic enzymes, which are catalytic proteins used by the cells to digest molecules from antigens, other organelles, complex sugars and proteins. More »

Eukaryotic cells are advanced cells that have, at minimum, a cellular membrane surrounding cytoplasm, a cytoskeleton and membrane-covered organelles. More advanced eukaryotic cells also contain a nucleus that protects ge... More »

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An animal cell contains a nucleus, cytoplasm that contains the various organelles and a cell membrane, also called a plasma membrane. The nucleus is the largest of the organelles and governs cell activity. It also contai... More »