What are the constituents of life?
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So far, science knows that in every life there is oxygen and protein or amino acid but other constituents are not known yet. Hindus believe that there is a life energy which is a property of Nature that is more vital than the material property as detected by the modern Science.
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Carbohydrates, Fats, Vitamins, Proteins, Minerals, Water
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study of the substances found in living organisms, and of the chemical reactions underlying life processes. This science is a branch of both chemistry and biology; the prefix bio- comes from bios, the Greek word for “life.” The chief goal of biochemistry is to understand the structure and behavior of biomolecules. These are the carbon-containing compounds that make up the various parts of the living cell and carry out the chemical reactions that enable it to grow, maintain and reproduce itself, and use and store energy.\n\nA vast array of biomolecules is present in the cell. The structure of each biomolecule determines in what chemical reactions it is able to participate, and hence what role it plays in the cell's life processes. Among the most important classes of biomolecules are nucleic acids, proteins, carbohydrates, and lipids.\n\nNucleic acids are responsible for storing and transferring genetic information. They are enormous molecules made up of long strands of subunits, called bases, that are arranged in a precise sequence. These are “read” by other components of the cell and used as a guide in making proteins.\n\nProteins (see Protein) are large molecules built up of small subunits called amino acids. Using only 20 different amino acids, a cell constructs thousands of different proteins, each of which has a highly specialized role in the cell. The proteins of greatest interest to biochemists are the enzymes (see Enzyme), which are the “worker” molecules of the cell. These enzymes serve as promoters, or catalysts, of chemical reactions.\n\nCarbohydrates (see Carbohydrate) are the basic fuel molecules of the cell. They contain carbon, hydrogen, and oxygen in approximately equal amounts. Green plants and some bacteria use a process known as photosynthesis to make simple carbohydrates (sugars) from carbon dioxide, water, and sunlight. Animals, however, obtain their carbohydrates from foods. Once a cell possesses carbohydrates, it may break them down to yield chemical energy or use them as raw material to produce other biomolecules.\n\nLipids are fatty substances that play a variety of roles in the cell. Some are held in storage for use as high-energy fuel; others serve as essential components of the cell membrane.\n\nBiomolecules of many other types are also found in cells. These compounds perform such diverse duties as transporting energy from one location in the cell to another, harnessing the energy of sunlight to drive chemical reactions, and serving as helper molecules (cofactors) for enzyme action. All these biomolecules, and the cell itself, are in a state of constant change. In fact, a cell cannot maintain its health unless it is continually forming and breaking down proteins, carbohydrates, and lipids; repairing damaged nucleic acids; and using and storing energy. These active, energy-linked processes of change are collectively called metabolism. One major aim of biochemistry is to understand metabolism well enough to predict and control changes that occur in cells. Biochemical studies have yielded such benefits as treatments for many metabolic diseases, antibiotics to combat bacteria, and methods to boost industrial and agricultural productivity. These advances have been augmented in recent years by the use of genetic engineering techniques.
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1 ribosomes\n2 stimuli\n3 enzyme\n4 cytoplasm
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Life is a multi-faceted concept. Life may refer to the ongoing process of which living things are a part, the period between the conception (or a point at which the entity can be considered to be an individualized being) and death of an organism, the condition of an entity that has been born (or reached the point in its existence at which it can be established to be alive) and has yet to die, and that which makes a living thing alive.
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All living things are made up of Carbon, Hydrogen, Oxygen and Nitrogen so there will be plenty of these in the produce section of the grocery store.  \nAs for compounds try fructose sugar, sucrose sugar, sodium chloride salt, cellulose in the cell walls of fruit and veges.  \nIn the hardware store you can find the metal elements copper, zinc and aluminium.\nThere are also many many more but hopefully this helps.
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Oxygen\nWater\nFood\nSunlight\nLove
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I too wonder about this question . I have reached following conclusion :\n1.Life is a part of big cycle that goes on and on. Everything is conserved and if you add evrything , you get a complete zero which is the gist of every cycle.\n2.Physically or materially speaking, life is mainly about food and sex which are essential to keep the cycle going.\n3.spiritually, everybody lives a unique and different life and they go through the given set of experience to learn som lessons.
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Things that make it possible to live on earth include oxygen,O2,(respiration) sunlight for plants to do photosynthesis, enough heat , not too much, water, H2O, plants to keep the oxygen cycle going and make food, land to be on, gravity to hold the atmosphere, the rest of the minerals and etc. we need supplied.
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Unable to guesstimate.  You're talking biological macromolecules, most likely.  They would probably have carbon, hydrogen, nitrogen, oxygen, sulfur, phosphorus, and perhals a halogen or two.  And maybe even a metal ion or two thrown in for good measure.
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The ingredients to make life are quite simple. They (aminoacids, nukleotides, fattyacids, sugars) have been found on many off world places such as comets, meteorites and interstellar molecular clouds. Knowing that the ingredients are common and form easily they just need to be exposed to an energy source, like a star, while suspended in a medium (water) and exposed to catalysts (like clays rich in metallic oxides), that greatly speed things up, and eventually more and more complex substances will form. The magic ingredient is time. No God is required to make life, the planets or the universe. It took some 3.8 billion years for life to evolve from the primordial soup to us. Give me that much time to toy around and I´ll build you a staircase to the moon using nothing but a teaspoon.
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All organic substances contain Carbon. Many also contain oxygen and or hydrogen.
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Elements are Carbon, Nitrogen, Phosphate, Oxygen
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Water, you can not sustain life without it. That includes every form of life, man, animal, forests, bacteria, etc. Everything!\n\nAir, which contains oxygen on which we as human beings depend on for our dear life.\n\nSunlight, which is the beginning of our very existence. Imagine what life would be if there was no sun. \n\nThere are many other natural resources which surround us on this wonderful planet called the Earth. But I would say that these three definitely top the list.\n\nBy the way, you ask very intelligent questions. Good for you to be so concerned about your enviornment.
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Elements:\n\nMain constituents are H, C, O, N, with considerable amounts of Ca, Na, P, S, Cl, less Mg, K, Fe, I, and traces of about any common element.\n\nThe most common simple molecule is water.\n\nMost important "inorganic" compounds are CaCO3 (in the bones), NaCl (dissolved in the water) and Ca2(PO4)OH in the teeth.\n\nThe main classes of chemicals are carbohydrates and proteins, which form the main structural elements of our cells as well as most of the functional framework. (DNA for instance has a modified carbohydrate linked by phosphate as its structural basis). Fats (triglycerides of fatty acids) are abundant, but don't participate structurally in most features of human anatomy except as fillers (lower skin, lips, breasts...)
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Vegetables contain all of these organic compounds in differing amounts.  Carbohydrates as both sugars and copious amounts of cellulose.  Proteins in the cells, but not generally as large structual components (obviously no huge protein sinks like muscles.)  Lipids as cell membranes etc....  All living things have nucleic acids, even viruses.
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if ur talking about cells... i think it is organelles...not sure