The cell nucleus controls most cell processes and contains DNA. The nuclear envelope surrounds the nucleus and contains pores, which regulate what goes in and out of this control center.Know More
The cell nucleus contains the chromatin, nucleolus, RNA and proteins suspended in a jelly-like matrix. The nuclear envelope encloses all these structures. Two membranes make up the nuclear envelope. The pores in the nuclear envelope restrict passage of bigger molecules such as DNA and proteins, but water, ions and smaller molecules pass through freely.
The nucleolus is a spherical structure that lies toward the center of the nucleus. Ribosomal RNA, DNA and proteins live inside this structure. Some ribosomes and partial ribosomes also inhabit the nucleolus, which is where ribosomes are made. When the ribosomes are complete, they move from the nucleus to the cytoplasm where they become the sites of protein synthesis.
The chromatin are structures that house the DNA, the molecule that provides the code for the making of proteins. During cell division, the chromatin condense into structures called chromosomes. When the cell needs to make certain proteins, the DNA is used as a template for the making of RNA. This molecule is the messenger RNA. Because DNA cannot pass through the nuclear envelope to the rest of the cells, the messenger RNA serves this function. This molecule travels to the ribosomes in the cytoplasm to be used as the template for the making of proteins.Learn more about Cells
RNA is important to cells because it relays information encoded in DNA to tiny organs within the cell, called ribosomes, which produce protein according to the RNA's instructions. RNA is thus vital to the basic functioning of the cell.Full Answer >
The cell nucleus is the command center and thus controls the activities of the eukaryotic cell. A double-walled cell nuclear envelope separates the nucleus from the cytoplasm and controls its shape while allowing chemical compounds to pass to and from the nucleus to control other activities in the cell. The nucleus contains the chromosomes, consisting of DNA, that regulate cell growth and reproduction.Full Answer >
Cell transcription occurs in the nucleus of the cell where the DNA is located. Transcription is the process whereby a DNA base sequence is copied to form an RNA molecule. The production of mRNA requires a DNA template.Full Answer >
Proteins are produced by stringing amino acids together in the order specified by messenger RNA strands that were transcribed from DNA in the cell nucleus. The process of synthesizing a protein is called translation, and it occurs on ribosomes in the cytoplasm of a cell.Full Answer >