AP BIOLOGY

Detailed explanation-1: -The nucleus is the most conspicuous organelle found in a eukaryotic cell. It houses the cell’s chromosomes and is the place where almost all DNA replication and RNA synthesis occurs.

Detailed explanation-2: -The nucleus is particularly important among eukaryotic organelles because it is the location of a cell’s DNA.

Detailed explanation-3: -In eukaryotic cells, genomic DNA is compactly stored in the nucleus by wrapping DNA around histone cores. The nuclear envelope (NE), composed of a double lipid bilayer and a structure called the nuclear lamina, encloses chromatin via the interaction between the nuclear lamina and chromatin.

Detailed explanation-4: -Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA). Mitochondria (Figure 5) are structures within cells that convert the energy from food into a form that cells can use.

Detailed explanation-5: -In eukaryotic cells, most DNA is located in the cell nucleus (though some DNA is also contained in other organelles, such as in the mitochondria and the chloroplast in plants).