Definition

1. Noun:
   • The central, membrane-bound structure within a eukaryotic cell that contains the cell's genetic material (DNA) and RNA, and is responsible for regulating growth, metabolism, and reproduction.

Usage

• The term "cell nucleus" is used in biology to refer to the defining organelle of eukaryotic cells (cells with a nucleus). It is the control center of the cell.
• It is typically used in scientific, academic, and educational contexts.

Examples

• Noun:
  • The cell nucleus contains chromosomes made of DNA.
  • Scientists observed the division of the cell nucleus during mitosis.
  • The function of the cell nucleus is to protect and organize the genetic material.

Advanced Usage

• "Nuclear envelope": The double membrane that surrounds the cell nucleus.
  • The nuclear envelope regulates the passage of molecules into and out of the cell nucleus.
• "Nuclear pore": A protein-lined channel in the nuclear envelope that allows transport.
  • RNA molecules exit the cell nucleus through nuclear pores.

Variants and Related Words

• Nucleus (n): Often used interchangeably with "cell nucleus" in biological contexts.
  • The nucleus is the most prominent organelle.
• Nuclear (adj): Of or relating to a nucleus.
  • Nuclear DNA is inherited from both parents.
• Nucleolus (n): A structure within the cell nucleus involved in ribosome synthesis.
  • The nucleolus is visible within the nucleus.

Synonyms

• Nucleus: The core or central part (in a biological context, it is synonymous).
• Karyon: A less common biological term for the cell nucleus.

Related Phrases

• "Nuclear membrane": Another term for the nuclear envelope.
  • The nuclear membrane breaks down during cell division.
• "Nuclear DNA": The DNA contained within the cell nucleus.
  • Nuclear DNA provides the blueprint for the organism.

Related Idioms

• • The original team formed the nucleus of the new company.

Noun

1. a part of the cell containing DNA and RNA and responsible for growth and reproduction