Final answer:
The molecule involved in homologous DNA recombination that coats single-stranded DNA and binds it to a second DNA strand is single-stranded binding proteins.
Step-by-step explanation:
The molecule involved in homologous DNA recombination that coats single-stranded DNA and binds it to a second DNA strand is single-stranded binding proteins. Single-stranded binding proteins are involved in the repair of DNA breaks and are responsible for preventing the single-stranded DNA from rewinding into a double helix. They play a crucial role in the formation of hydrogen bonds between complementary sequences on single strands to form double-stranded DNA through a process called annealing.