point mutation has transition (when a purine base is substituted with another purine or pyramidine with pyramidine) or transversion (purine with pyramidine or vice versa) point mutations give rise to silent mutation, nonsense mutation and missense mutation. silent mutations are the least harmful cause their change of the base does not result in anything cause they code for the same amino acid. missense codes for a different amino acid, and nonsense codes for a stop codon.
The carbohydrates produced by plants are an important source of energy for animals. When animals eat plants, energy stored in carbohydrates is released in the process of respiration, a chemical reaction between glucose and oxygen to produce energy (for cell work), carbon dioxide, and water.tarch is the usual form in which carbohydrates are stored as energy by plants. Plants can split starch into its simpler glucose units for use as energy when needed. Cellulose is known as a structural carbohydrate because of the fibers formed by its molecules.
Carbohydrates are one of the four major classes of organic compounds in living cells. They are produced during photosynthesis and are the main sources of energy for plants and animals. The term carbohydrate is used when referring to a saccharide or sugar and its derivatives.arbohydrates are one of the four major classes of organic compounds in living cells. They are produced during photosynthesis and are the main sources of energy for plants and animals. The term carbohydrate is used when referring to a saccharide or sugar and its derivatives.