proteins

structure of proteins

polymers of long chains of amino acid monomers

what 4 things are amino acids composed of

• central carbon

• amine group

• carboxylic acid

• side group

what is the link between amino acids called

peptide bond

2 examples of hydrophobic proteins

keratin and collagen

in hydrophobic proteins, where are the hydrophobic amino acids located

on their surface

do globular proteins have a hydrophobic or hydrophilic surface

hydrophilic surface

3 things globular proteins function as

• carrier molecules like hemoglobin

• antibodies

• enzymes

what is the structure of proteins associated with the cell membrane

contain a layer of hydrophobic amino acids sandwiched between layers of hydrophilic amino acids

main function of proteins embedded in membranes

transport or signal transfer

3 foods proteins are found in

• eggs

• meat

• beans

main function of enzymes

speed up reactions by lowering the energy required by the system to initiate the reactions

exergonic

release energy

endergonic

require energy

what could enzyme activity be affected by

environmental conditions such as temperature and pH level

where doers catalysis occur

on the active site

example of an enzyme

pepsin

what is pepsin produced and secreted by

the stomach cells

main function of pepsin

initiates protein digestion in the stomach