Nucleic acids are polymers of individual nucleotide monomers. Each nucleotide is composed of three parts: a 5-carbon sugar, a phosphate group, and a nitrogenous base. Only two 5-carbon sugars are found in nature: ribose and deoxyribose. 5-carbon sugar (ribose or deoxyribose) forms the central molecule in a nucleotide. By convention, the carbon atoms in the sugar are numbered from the original carbonyl position on the chain using a number plus the prime symbol (â).
Photosynthesis is the process by which green plants and certain other organisms transform light energy into chemical energy. Photosynthesis in green plants harnesses the energy of sunlight to convert carbon dioxide, water, and minerals into organic compounds and gaseous oxygen.
Key content 1. photosynthesis is a cellular process through which organisms capture light energy from the sun and use it to generate and store energy. 2. cellular respiration releases stored energy in glucose, allowing the organism to function. 3. Light is required for photosynthesis to occur, although parts of photosynthesis can happen in the absence of light. 4. photosynthesis happens in the chloroplasts, which con-tain chlorophyll. 5.