GENERAL HISTOLOGY

Detailed explanation-1: -Which of the following is found in bacterial cell & plant cell but not in animal cell?

Detailed explanation-2: -Bacteria lack many of the structures that eukaryotic cells contain. For example, they don’t have a nucleus. They also lack membrane-bound organelles, such as mitochondria or chloroplasts.

Detailed explanation-3: -Unlike the eukaryotic (true) cells, bacteria do not have a membrane enclosed nucleus. The chromosome, a single, continuous strand of DNA, is localized, but not contained, in a region of the cell called the nucleoid. All the other cellular components are scattered throughout the cytoplasm.

Detailed explanation-4: -The DNA of bacterial cells is found loose in the cytoplasm. It is called chromosomal DNA and is not contained within a nucleus. Bacteria also have small, closed-circles of DNA called plasmids present in their cytoplasm.

Detailed explanation-5: -Bacteria lack the membrane-bound nuclei of eukaryotes; their DNA forms a tangle known as a nucleoid, but there is no membrane around the nucleoid, and the DNA is not bound to proteins as it is in eukaryotes. Whereas eukaryote DNA is organized into linear pieces, the chromosomes, bacterial DNA forms loops.