your body needs to stay at a ph level of 7.4

• _ carbonate helps maintain ph in blood

--- three of these molecules have special types of bonds, while lipds have non covalent

• proteins are made of 20 different amino acids
• carbohydrates - sugar monomers linked to polysaccharides
• lipids - noncovalent forces keep the relationship between lipid monomers
• nucleic acid- variety of four nucleotide monomers

how are macromolecules formed

• condensation reactions where polymers are formed *releases water
• monomers joined via covalent bonds; energy must be used
• water is removed, dehydration reactions

hydrolysis reaction water breaking reaction

• hydrolysis lets out energy
• takes up one water