The genome size, and the number of genes it encodes varies widely between organisms. The smallest genomes occur in viruses (which can have as few as 2 protein-coding genes), and viroids (which act as a single non-coding RNA gene). Conversely, plants can have extremely large genomes, with rice containing >46,000 protein-coding genes. The total number of protein-coding genes (the Earth's proteome) is estimated to be 5 million sequences.
The genome size , and the number of genes it encodes varies widely between organisms . The smallest genomes occur in viruses ( which can have as few as 2 protein - coding genes ) , and viroids ( which act as a single non - coding RNA gene ) . Conversely , plants can have extremely large genomes , with rice containing > 46,000 protein - coding genes . The total number of protein - coding genes ( the Earth 's proteome ) is estimated to be 5 million sequences .
What is the estimate for the total number of protein coding genes on Earth?
What is the estimate for the total number of protein coding genes on Earth ?
5 million
5 million