Quick Answer. Instinct, or innate behavior, is an action that is impulsive or immediate based on a particular trigger or circumstance. Learned behavior is an action that someone learns or develops over time through observation, education, training or experience.
The nuclear lamina is a dense (~30 to 100 nm thick) fibrillar network inside the nucleus of most cells. It is composed of intermediate filaments and membrane associated proteins. Besides providing mechanical support, the nuclear lamina regulates important cellular events such as DNA replication and cell division.Additionally, it participates in chromatin organization and it anchors the nuclear pore complexes embedded in the nuclear envelope.he nuclear lamina is assembled by interactions of two lamin polypeptides in which the Î±-helical regions are wound around each other to form a two stranded Î±-helical coiled-coil structure, followed by a head-to-tail association of the multiple dimers.
Nuclear Membrane. The nuclear membrane is a double-layered structure that encloses the contents of the nucleus. The outer layer of the membrane is connected to the endoplasmic reticulum. A fluid-filled space or perinuclear space is present between the two layers of a nuclear membrane.tructure of Cell Nucleus. The cell nucleus consists of a nuclear membrane (nuclear envelope), nucleoplasm, nucleolus and chromosomes. Nucleoplasm, also known as karyoplasm, is the matrix present inside the nucleus. Let's discuss in brief about the several parts of a cell nucleus.