Question

Name two cell organelles which are membrane bound.

Answer 1

Internal membranes create intracellular compartments with different functions – membrane-bounded or membrane-enclosed organelles.

ORGANELLES BOUNDED BY DOUBLE-MEMBRANE ENVELOPES

Three of the major cell organelles, the nucleus, mitochondrion, and, in plant cells, the chloroplast, are all enclosed within an envelope consisting of two membranes.

ORGANELLES BOUNDED BY SINGLE-MEMBRANE ENVELOPES

Eukaryotic cells contain many sacs and tubes bounded by a single membrane. Although these are often rather similar in appearance, they can be subdivided into different types specialized to carry out distinct functions. The next organelles are single-membrane-bounded: endoplasmic reticulum, Golgi apparatus, lysosomes, peroxisomes.

ORGANELLES WITHOUT MEMBRANE ENVELOPES

The discrete structures of a eucaryotic cell that are specialized to carry out a particular functions and are not enclosed within membrane: ribosome, centrosome, cytoskeleton, some types of cells have cilia or flagella.