Chromosomes control cell processes. They do this by A) providing energy for the cell to use. B) destroying foreign organisms that invade the cell. C) coding for the production of all a cell’s proteins. D) providing a site for the synthesis of the cell’s proteins.
The Correct Answer and Explanation is :
The correct answer is C) coding for the production of all a cell’s proteins.
Explanation:
Chromosomes are structures found in the nucleus of eukaryotic cells and in the cytoplasm of prokaryotic cells, made up of DNA. DNA (deoxyribonucleic acid) carries the genetic instructions used in the growth, development, functioning, and reproduction of all living organisms. These instructions are organized in a sequence of nucleotides, which make up genes.
Each chromosome contains many genes, each coding for a specific protein or a set of proteins that the cell needs to perform various functions. The process of creating proteins is known as protein synthesis, and it occurs in two main stages: transcription and translation.
- Transcription: In the nucleus, a gene from the DNA is transcribed into a messenger RNA (mRNA) molecule. This mRNA acts as a copy of the gene and carries the genetic code from the DNA to the ribosomes, the cell’s protein-making machinery.
- Translation: At the ribosome, the mRNA is translated into an amino acid sequence, which folds into a specific protein. The proteins produced carry out essential functions in the cell, such as catalyzing metabolic reactions, providing structural support, and regulating cell processes.
Chromosomes do not directly provide energy for the cell (answer A), destroy foreign organisms (answer B), or serve as a site for protein synthesis (answer D). Instead, their primary role is to carry the genetic information that directs the production of proteins essential for all cellular functions, such as cell division, growth, and response to the environment. Without the proteins encoded by the chromosomes, the cell could not carry out its necessary processes for survival. Thus, the chromosomes control the cell’s processes through their coding functions.