Proteins are made from long chains of smaller molecules called amino acids. These long chains are folded into particular shapes. This is important in relation to how antibodies and enzymes work. Enzymes are biological catalysts. There are optimum temperatures and pH values at which their activity is greatest.
It costs just $0.25 to send a text message from the U.S. to an international number. For customers who frequently send text messages to family or friends overseas, AT&Tâs International Long Distance Messaging package includes 100 text messages sent from the U.S. for $10 a month.
Text messaging is very cheap in most parts of the world. In fact, in 2015, the cost of sending an SMS in Australia was calculated to be just $0.00016. While the bulk of a cell phone bill typically is its voice minutes or data usage, text messages are either included in the voice plan or are added as an extra cost. However, while SMS is pretty cheap in the grand scheme of things, it does have its drawbacks, which is why text messaging apps are becoming more popular. Note: SMS is often referred to as texting, sending text messages or text messaging. It's pronounced as ess-em-ess.