Open your document and click on the file menu, then click on Save As. On the right hand side you will need to choose a location to save the password protected version of the PDF. Now drop down the Save as type box and choose PDF. This will make an options button appear, click on it.
To do the math, each base pair takes 2 bits (you can use 00, 01, 10, and 11 for T, G, C and A). Multiply that by the number of base pairs in the human genome, and you get 2 * 3 billion = 6,000,000,000 bits. And remember, you have to go from bits to bytes to get to an answer in megabytes. A bit is just a single unit of digital information, but a byte is a sequence of bits (usually 8).
These four molecules are adenine (A), thymine (T), cytosine (C), and guanine (G). All genes are made up of stretches of these four bases (arranged in different ways and in different lengths). Photo: National Institute of Health. A critical feature of DNA is the ability of the nucleotides to make specific pairs: . Adenine pairs with Thymine and Cytosine pairs with Guanine. The human genome of Homo sapiens is stored on 23 chromosome pairs. 22 of these are autosomal chromosome pairs, while the remaining pair is sex-determining. The haploid human genome occupies a total of just over 3 billion DNA base pairs that means 6 billion base pairs per diploid cell.