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chemical basis of life


science that investigates matter and its interactions


all atoms with the same atomic #

recognize elements of the periodic table,examples:

K-potassium, O- oxygen, N- nitrogen

how many elements are known to be needed by living things?

26 elements

over 95% of the human body is made up of what four elements?

oxygen, hydrogen, carbon, nitrogen

list the parts of the atoms

protons, nuetrons, electrons

what is the characteristic of a proton in a atom

posotive charge and found in the nucleus

what is the characteristic of a nuetron in a atom

no charge found in the nucleus

what is the characteristic of a electron in a atom

negative charge and found on the outer shell


forms of an element whos atoms contain the same number of protons and nuetrons

gamma rays

the most penetraining form of radiation

which istope has the longest half life?

Ra, Radon

what isotope is used for thyroid treatment


what happens to electrons in a covalent bond

sharing of electrons

what happens to electrons in an ionic bond

transfer of electrons

what is different about a hydrogen bond?

weak negative charge


takes place in an endergonic reaction


tekes placei n a exoganic reaction


a protien

what is an enzymes function?

catalyzes a biochemical reaction


any substance that breaks apart in a solution to release hydrogen ions


a substance that removes hydrogen ions from a solution

pH scale

extreme nuetal extreme
acid base

whats the difference in concentration from one step to another on the pH scale

its either more of a base or one step more toward an acid


conditions of an acid


condition of alkaline (basic)

what are the 4 inorganic constituents of the body?

H2O, O2, CO2, salts

what is the function of the inorganic constituent H2O

stabalizes, body temperature, protection, lubracants

what is the function of the inorganic constituent O2

cellular organelles use O2 to release energy from glucose and other nutrients

what is the function of the inorganic constituent CO2

reacts with H2Oto form weak acid which ionizes

what is the function of the inorganic constituent salts

transports thing out of cells, maintains prople water concentration


organic compound containing carbon, hydrogen and oxygen in a specific ratio

functions of a carbohydrate

provides energy for cells; stored as reserved energy


inorganic compound containing carbons, hydrogens and oxygens in a ration that does not approximate in 1:2:1

examples of lipid

fats, oils and waxes

what is the most common lipid?


what are two steroids

cholestral and sex hormones


a large polypeptide with a complex structure

what are the function of a protien

support structural materials for 3-d framework transprots hormones

protien denaturing

it makes the protiens lose its 3-d structure

what causes protien denaturing

high temp.

nucleic acid

a chain of nucleotides containing a 5 carbon sugar, a phosphat group and one of four nitrogen bases that regulate

what are the functions of nucleic acid

strong and also process information

what is DNA

deoxiribonucleic acid

what is RNA

ribosnucleic acid

deoxyribonucleic acid

stored info for cells to synthesize protien molecules, inherited characteristics

ribosnucleic acid

specific protien synthesis

what base pairs are associated with nucleic acid

thymine, adenine, unacil, guanine, and cytosine

what is the most important high energy compound for our cells


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