I believe the best answers are 400-450 nm and 670 -680 nm. Photosynthesis is the process in which green plants make their own food by using energy from sunlight in organelles called chloroplasts. Chlorophyll absorb light used in photosynthesis. In this process the sun's energy is converted to chemical energy by the photosynthetic organisms. Absorption spectrum of chlorophyll includes wavelengths of blue and orange-red light, as is indicated by their peaks around 450-475 nm and around 650-675 nm
Complex nutrients are digested and then absorbed into the bloodstream as monomers.
Nutrients from food can be used in the body only when are broken down to their basic units: carbohydrates in monosaccharaides, lipids in free fatty acids, proteins in amino acids and nucleic acids in nucleotides.
Those molecules together with water and minerals from the diet, are absorbed in the small intestine. The absorbed molecules are then transported into the bloodstream and carried to different parts of the body for usage, storage or chemical transformation. Some of the macromolecules are broken down in mouth (e.g. starch), or in stomach by the enzymes.
