How much is $1 dollar in Binance?

Could you please elaborate on the process of converting US dollars to cryptocurrency on the Binance platform? Specifically, I'm interested in understanding the current exchange rate for converting $1 USD to the various cryptocurrencies offered on Binance. Does the exchange rate fluctuate based on market conditions? Additionally, what are the steps involved in making such a conversion? Are there any fees associated with the transaction? I'd appreciate a concise yet thorough explanation to help me understand the process and costs associated with converting $1 USD to cryptocurrency on Binance.