The nematode C. elegans has approximately 19,000 genes, while humans have 25,000. Although the number of genes is similar, humans can make more than 4x as many proteins as C. elegans. What is the most plausible explanation for this phenomenon?
Multiple Choice
The C. elegans genome is much smaller in size, so not as many proteins are made.
Genes in humans are much larger than those of C. elegans.
Human proteins are modified post-translationally by changing amino acid side chains.
In humans, genes can be transcribed using either strand of DNA as a template.
In humans, more pre-RNAs can be alternatively spliced to generate different mRNAs.