Tobacco mosaic virus (TMV) genes are:

Explanation

Let's explain each option individually:a) Single-stranded RNA:This option is correct. The genes of the Tobacco mosaic virus (TMV) are composed of single-stranded RNA (ribonucleic acid). TMV is a plant virus known for causing the tobacco mosaic disease, which affects various plants, including tobacco, tomatoes, peppers, and other members of the Solanaceae family. The RNA genome of TMV encodes the genetic information necessary for the virus to replicate and produce its proteins during the infection process.b) Double-stranded DNA:Double-stranded DNA (deoxyribonucleic acid) is a genetic material found in most living organisms, including plants, animals, and bacteria. However, TMV is not a DNA virus; it is an RNA virus with a single-stranded RNA genome.c) Proteinaceous:The term "proteinaceous" refers to something that is primarily composed of proteins. While TMV is a virus made up of proteins and RNA, the genes of TMV are specifically composed of single-stranded RNA, not just proteins.d) Double-stranded RNA:This option is not correct. TMV does not have a double-stranded RNA genome. Instead, its genome consists of a single-stranded RNA molecule.In summary, the correct answer is a) Single-stranded RNA. The genes of the Tobacco mosaic virus (TMV) are composed of single-stranded RNA. This RNA genome contains the instructions for the virus to infect host plant cells, replicate, and produce new viral particles, leading to the characteristic mosaic-like patterns and other symptoms observed in infected plants.