GENERAL HISTOLOGY

Detailed explanation-1: -Ribosomes are non-membrane bound organelles found in all cells-both eukaryotic as well as prokaryoric. Within the cell, ribosomes are found not only in the cytoplasm but also within the two organelles-chloroplasts (in plants) and mitochondria and on rough ER.

Detailed explanation-2: -Ribosomes are present in the cytoplasm of bacterial and eukaryotic cells. They are also present within semiautonomous eukaryotic organelles of bacterial ancestry, namely mitochondria and chloroplasts.

Detailed explanation-3: -Ribosomes are mainly found bound to the endoplasmic reticulum and the nuclear envelope, as well as freely scattered throughout the cytoplasm, depending upon whether the cell is plant, animal, or bacteria.

Detailed explanation-4: -Ribosomes are not membrane-bound and float freely in the cytoplasm. These organelles do not require a membrane to carry out their functions and thus are devoid of it.

Detailed explanation-5: -Mitochondria are bounded by a double-membrane system, consisting of inner and outer membranes. Folds of the inner membrane (cristae) extend into the matrix.