again temperature, it occnaturally and when you do things like run or play you get hotter and sweaty ya'know.
During Replication, each of its double strands of DNA splits into two single strands. DNA single strand acts as a template for the formation of a new strand of complementary DNA (end product).
In transcription, DNA is copied (transcribed) to mRNA (end product), which carries the information needed for protein synthesis.
During translation, mRNA directs protein synthesis (end product) with the assistance of tRNA
What polar bears do to keep their temperature at a steady pace in cold temperatures is that they eat enough food to have a steady source and supply/constant amount of fat. Fat acts as an insulating agent and bears have plenty of it. This also explain why a lot of other animals who live in very cold climates have a lot of fat on their bodies.