Nucleic acids are the molecules that carry the genetic information that is passed down from parent to child. However, nucleic acids are special since they can also combine with proteins to become the machines -- called ribosomes -- that turn genetic instructions in nucleic acids into other protein machines. Nucleic acids are linked together into a chain. DNA is made of two chains that connect like a rope ladder.
Stock Ticker V The ticker symbol for Visa is V and it is traded on the New York Stock Exchange. Shares of the credit giant began trading on March 19, 2008.
All Visa credit cards start with a 4, MasterCard with a 5, and 6 is dedicated to Discover. The first six digits of your card, including the industry identifier, represent the issuer identification number. This identifies the bank that issued the card. And then, of course, there's your personal account number. This is made up of the seventh digit on -- everything except the last number on your card. The final digit on your credit card is known as the check digit or checksum.. This number is set by something called the Luhn formula, patented by Hans Peter Luhn, an IBM scientist in 1960. It's a formula that uses the numerals in your card's account number to verify that it's valid.