NEET BIOLOGY

Detailed explanation-1: -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-2: -Mitochondria are oval-shaped, double-membrane organelles (Figure 3.17) that have their own ribosomes and DNA.

Detailed explanation-3: -A large oval structure called the nucleus (NOO klee us) acts as a cell’s control center, directing all of the cell’s activities. The nucleus is the largest of the cell’s organelles. Notice in Figure to the left, that the nucleus is surrounded by a membrane, called the nuclear envelope.

Detailed explanation-4: -The nucleus is a membrane-enclosed organelle found in most eukaryotic cells. The nucleus is the largest organelle in the cell and contains most of the cell’s genetic information (mitochondria also contain DNA, called mitochondrial DNA, but it makes up just a small percentage of the cell’s overall DNA content).

Detailed explanation-5: -The nucleus, formed by a nuclear membrane around a fluid nucleoplasm, is the control center of the cell. Threads of chromatin in the nucleus contain deoxyribonucleic acid (DNA), the genetic material of the cell.