Answer:
Molecules are two or more atoms chemically joined together
Compounds are two or more different elements joined together chemically(heteronuclear or homonuclear).
Explanation:
All compounds are molecules, but not all molecules are compounds. a molecule can be made of two atoms of the same kind, as when two oxygen atoms bind together to make an oxygen molecule, all compounds are made up of two or more different types of atoms.One that is used a lot is water(H2o)
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The answer is D. Phospholipids are diglycerides (two fatty acid chains covalently bonded to a glycerol molecule)
that are covalently bonded to a phosphate group by an ester linkage. Fatty
acids are long chains that are mostly made up of hydrogen and carbon, while
phosphate groups consist of a phosphorus molecule with four oxygen molecules
attached. Glycerol is a 3 carbon chain containing hydroxyl groups in each of the carbon.
Answer:
Stephen Hawking is the famous physicist who wrote a brief History of time
Answer:
Antigens, and epitopes.
Explanation:
Antigen is known as a substances which is capable of the causes an immune response in the body, and specifically activating white blood cells which are known as body's infection fighting cells. In general antigens are two types:
1) Foreign antigens or heteroantigens.
2) Auto-antigens or self antigens.
Epitopes are the part of an antigen which is recognized with the help of immune system, specifically by B cells, T cells, and antibodies. They are also called as antigenic determinants. The epitope is defined as the specific part of the antigen where an antibody binds.
