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Biology Exam Terms

BJU chapters 1-6 terms

QuestionAnswer
matter anything taking up space and has mass
element a pure substance that cannot be broken down inot a simpler form
atom smallest unit of an element
ion an atom with a charge
mixture two or more substances are combined without chemical bonding
energy ability to do work or cause a change
catalyst substances that affect the rate of the reaction but are not changed themselves in the reaction
solution homogeneous mixture of one or more substances
colloid a special protoplasmic mixture
diffusion the net movement of molecules inot a higher concentrated area
permeable a barrier that allows passages of all molecules
semipermeable membrane a barrier that only allows certain things in
osmosis diffusion of water molecules between a semipermeable membrane
glucose a six carbon sugar manufactured by plants
hydrolysis a large molecule is broken down by adding water
pollysaccaride a large molecule of momssacharide units
hydrophilie is attracted to water by the polar pull
hydrophobic repelent to water
protein consists primarily of carbon dioxide
amino acid basic building blocks of a protein
peptide bond one that links carboxyl group of one amino acid to another
DNA primary nucleic acid in many oranisms
replication producing two new DNA molecules from one old one
RNA basic nucleic acids for a few viruses
transcription RNA is fomred by DNA
isotonic consentration outside the cell is the same as in the cell
hypotonic higher solution inside the cell
passive transport movement of molecules across a membrane with the concentration gradient
active transport when energy is required
autotroph able to make their own food
heterotroph depending on another organism to make their own food
Created by: kimberleyr
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