A gene is a sequence of Blank______. Multiple choice question. DNA RNA
The correct answer and explanation is:
The correct answer is DNA.
A gene is a sequence of DNA. DNA stands for deoxyribonucleic acid, and it contains the hereditary information necessary for the growth, development, and functioning of all living organisms. Genes are specific segments of DNA that carry instructions for making proteins or RNA molecules. These instructions are encoded in the sequence of nucleotides within the DNA strand.
DNA is made up of four types of nucleotides, which are adenine (A), thymine (T), cytosine (C), and guanine (G). The sequence of these nucleotides determines the genetic code. When a gene is expressed, its DNA sequence is first transcribed into RNA, specifically messenger RNA (mRNA), which then directs the synthesis of proteins in a process called translation.
RNA, or ribonucleic acid, is similar to DNA but typically single-stranded and contains the nucleotide uracil (U) instead of thymine. RNA molecules are often the product of gene expression, but the gene itself is a DNA sequence. RNA plays various roles in the cell, including carrying genetic information from DNA to ribosomes, serving as a catalyst, or regulating gene expression.
In summary, genes are segments of DNA that serve as the blueprint for producing RNA and proteins. While RNA is crucial for gene expression, the gene itself is made of DNA.