GENERAL HISTOLOGY

Detailed explanation-1: -The small darkly staining granules are chromatin (chromosomes). The larger dark purple structure is the nucleolus.

Detailed explanation-2: -Nucleus. Known as the cell’s “command center, ” the nucleus is a large organelle that stores the cell’s DNA (deoxyribonucleic acid). The nucleus controls all of the cell’s activities, such as growth and metabolism, using the DNA’s genetic information.

Detailed explanation-3: -By housing the cell’s genome, the nucleus serves both as the repository of genetic information and as the cell’s control center. DNA replication, transcription, and RNA processing all take place within the nucleus, with only the final stage of gene expression (translation) localized to the cytoplasm.

Detailed explanation-4: -EM 007 Nucleus Exists in two forms: Heterochromatin (dark blue)-condensed chromatin that is transcriptionally inactive (intensely stained) Euchromatin (light blue)-dispersed regions of unpacked chromatin that is often actively transcribed (lightly stained)