Humber Admissions Practice Test

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What does the nucleus contain that is crucial for cell growth and reproduction?

Ribosomes
DNA and RNA
Enzymes
Proteins

The correct answer is: DNA and RNA

The nucleus plays a critical role in cell growth and reproduction because it houses the cell's genetic material, primarily in the form of DNA. This DNA contains the instructions necessary for synthesizing proteins, which are essential for various cellular functions and processes. During cell division, the replication of DNA ensures that each new cell receives an identical set of genetic information, allowing for the continuation of life and proper functioning of the organism. While RNA is also present in the nucleus, its primary function is to aid in protein synthesis, acting as a messenger that carries the information from DNA to ribosomes where proteins are made. Thus, the combination of DNA and RNA in the nucleus supports both the growth of the cell and its ability to reproduce by facilitating the flow of genetic information necessary to create proteins and other vital molecules.