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chemical compounds in cells (elements and compounds (elements (an element…
chemical compounds in cells
elements and compounds
elements
an element is any substance that cannot be broken down into simpler substances
oxygen and nitrogen are elements
compounds
when two or more elements combine chemically they form a compound
carbon dioxide is a compound
organic and inorganic compounds
most compounds that contain carbon are called organic compounds
Some important groups of organic compounds found in living things are carbohydrates, lipids, proteins, and nucleic acid.
proteins
functions of proteins
much of the structure of cells are made up of proteins
an enzyme is a type of protein that speeds up a chemical reaction in a living thing
structure of proteins
protein molecules are made up of smaller molecules called amino acids
there are only 20 common amino acids
lipids
fat from meat are lipids so are oils and waxes
carbohydrates
A carbohydrate is an energy-rich organic compound made of the elements carbon, hydrogen and oxygen
nucleic acids
nucleic acids are very long organic molecules made of carbon
water and living things
most chemical reactions within cells could not take place without water