Q:

How does the nucleus control a cell's activities?

A:

Quick Answer

A cell's nucleus is able to control the other activities in a cell by expressing certain segments of its DNA, which creates proteins that perform specific activities. Proteins can vary from enzymes to structural components, but they are needed for almost all processes in a cell and the human body.

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Full Answer

In order to create a protein, a segment of the DNA must first be replicated. This process begins in the nucleus, where a copy of the segment called messenger RNA, or mRNA, is created. After being formed, the mRNA exits the nucleus. It is utilized by a ribosome to create the appropriate protein that corresponds to the sequence in the mRNA.

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Related Questions

  • Q:

    What is the function of the nuclear membrane in an animal cell?

    A:

    The function of the nuclear membrane in an animal cell is to hold the DNA inside the nucleus in order to protect it from surrounding substances. The nuclear membrane also regulates which substances can enter or exit the nucleus.

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  • Q:

    What does the nucleus do in a plant cell?

    A:

    The function of the nucleus in the plant cell is to store the plant's DNA and control the activity of the cell through protein synthesis. The nucleus is enclosed by the nuclear membrane, which has pores for the passage of RNA and proteins. The nucleus contains the nucleolus and chromatin.

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  • Q:

    What role does RNA play in cell life?

    A:

    Scitable explains that the central role of ribonucleic acid, or RNA, is to convert instructions written in the code of the organism's DNA into proteins. However, RNA is also involved in a number of other processes, such as signaling other cells and functioning as catalysts in cellular chemistry. Additionally, the ribosomes, which convert RNA into structural proteins, are themselves composed primarily of RNA.

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  • Q:

    Why is the nucleus called the control center of the cell?

    A:

    The nucleus can be thought of as the control center of a eukaryotic cell because it contains most of the genetic material that carries the instructions for the cell's operations. Inside the nucleus, DNA directs the sequence of chemical steps needed for the synthesis of proteins and, by way of the proteins' action, it controls the metabolism of the rest of the cell.

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