From the sandy creek in the Cajon Pass, into Lone Pine Canyon, up and along the Blue Ridge to the summit of Mt. Baden-Powell, then edging along to Islip Saddle, the trail within proximatey to Wrightwood provides views of the extended metropolitan areas of Southern California and the Mojave Desert.
Guanine, along with adenine and cytosine, is present in both DNA and RNA, whereas thymine is usually seen only in DNA, and uracil only in RNA. Guanine has two tautomeric forms, the major keto form (see figures) and rare enol form. It binds to cytosine through three hydrogen bonds.
DNA has a thymine base and RNA has a uracil base. Identify the nucleotide base found only in DNA and the base found only in RNA. Two outside strands consist of alternating deoxyribose and phosphate. Cytosine and guanine bases pair to each other by three hydrogen bonds. Thymine and adenine bases pair to each other by two hydrogen bonds. Summarise the important features of the DNA molecule proposed by James Watson and Francis Crick.