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5 days ago · Definition. Ribonucleic acid (abbreviated RNA) is a nucleic acid present in all living cells that has structural similarities to DNA. Unlike DNA, however, RNA is most often single-stranded. An RNA molecule has a backbone made of alternating phosphate groups and the sugar ribose, rather than the deoxyribose found in DNA.
5 days ago · A nucleotide consists of a sugar molecule (either ribose in RNA or deoxyribose in DNA) attached to a phosphate group and a nitrogen-containing base. The bases used in DNA are adenine (A), cytosine (C), guanine (G) and thymine (T). In RNA, the base uracil (U) takes the place of thymine.
5 days ago · Definition. Double helix, as related to genomics, is a term used to describe the physical structure of DNA. A DNA molecule is made up of two linked strands that wind around each other to resemble a twisted ladder in a helix-like shape.
6 days ago · The Short Answer: Science consists of observing the world by watching, listening, observing, and recording. Science is curiosity in thoughtful action about the world and how it behaves. Anyone can think like a scientist. Science is . . . Observing the world. Watching and listening. Observing and recording.
6 days ago · NASA’s award-winning Space Place website engages upper-elementary-aged children in space and Earth science through interactive games, hands-on activities, fun articles and short videos. With material in both English and Spanish and numerous resources for kids, parents and teachers, Space Place has something for everyone.
6 days ago · In California, there are over 6 million adults who are un-or-underemployed and feel stuck. We call them “stranded workers,” which is poetic. The United Way has recently come up with its own term, which is more technical: ALICE, an acronym for “Asset Limited, Income Constrained, Employed.”.
5 days ago · After suddenly becoming stranded on a remote Western Australia beach with no way home, the young teenagers called upon their survival skills to grab the attention of rescuers and get themselves saved!