Final answer:
DNA codes for DNA polymerase, and without regulatory sites, gene expression would not be controlled. Therefore, the correct answer is T&T (True and True), as both statements are accurate.
Step-by-step explanation:
DNA codes for DNA polymerase. DNA polymerase is an enzyme responsible for synthesizing new DNA strands during DNA replication. Without DNA polymerase, DNA replication would not be possible.
Without regulatory sites, the expression of a gene would not be controlled.
Regulatory sites, such as promoter sequences and transcription factor binding sites, play a crucial role in controlling the expression of genes.
These sites determine when and how much a gene is transcribed into mRNA and ultimately translated into a protein.
Therefore, the correct answer is T&T (True and True), as both statements are accurate.