The equivalent of a structural gene is a:
Correct answer: B. Cistron
- A. Muton
- B. Cistron
- C. Operon
- D. Recon
Explanation
Cistron (or gene) is a length of DNA that contains the information for coding a specific polypeptide chain or a functional RNA molecule (i.e. transfer RNA or ribosomal RNA). Hence, the cistron is a unit of function. Currently, such a gene is called a structural gene. A "cistron" is an older term that was used in early molecular biology to describe a segment of DNA that encodes a single gene. It is essentially equivalent to what we now commonly refer to as a "gene."
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About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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