NEET BIOLOGY

Detailed explanation-1: -Complete answer: Organic molecules are usually composed of carbon atoms in rings or long chains, to which are attached other atoms of such elements as hydrogen, oxygen, and nitrogen. Hence carbon elements are found in all organic molecules.

Detailed explanation-2: -All organic compounds, such as proteins, carbohydrates, and fats, contain carbon, and all plant and animal cells consist of carbon compounds and their polymers.

Detailed explanation-3: -Organic molecules must contain carbon atoms covalently bonded to hydrogen atoms (C-H bonds). They usually involve oxygen and can also contain nitrogen, sulfur, phosphorous, and others. Hydrocarbons, like alkanes, alkenes and alkynes are all organic molecules and so are alcohols, carboxylic acids and carbohydrates.

Detailed explanation-4: -Organic compounds contain carbon, almost always bonded to another carbon and/or hydrogen. Sometimes, other elements, such as phosphorus, nitrogen and oxygen, are also bound to carbons. There are a few carbon compounds that are not considered organic molecules.

Detailed explanation-5: -Carbon’s ability to form up to four covalent bonds means chains and rings of carbon can form. This means many different molecular structures can be built from this versatile atom. Carbon can easily bond to lots of other elements, including hydrogen, oxygen and the halogens.