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Terms
undefined, object
copy deck
- RNA polymerase
- catalyzes transcription of DNA
- transcription
- the copyin g of the dNA message onto mRNA
- translation
- reading of messenger RNA for protein synthesis
- mRNA
- directs synthesis of a protein
- tRNA
- binds to an amion oacid and holds it in place on a ribosome until it is incorportated into a protein during translation
- rRNA
- joins with ribosomal proteins to make ribosomes
- promotor
- segment of DNA where transcription begins
- intron
- do not code for parts of proteins
- exon
- do code for parts of proteins
- lysosomes
- vesicle formed from golgi complex; contains digestive enzymes
- peroxisomes
- vesicles containing oxidases and catalase
- proteasomes
- tiny structure that contains proteases (proteolytic enzymes); degrade defective transporters
- facilitated dffusion
- passive movement of a substance down its concentration gradient via transmembrane proteins that act as transporters
- primary active transport
- transport of a substance across the membrane across its concentration gradient by pumps; transmembrane proteins that use energy supplied by hydrolysis of ATP
- secondary active transport
- indirectly uses energy obtained from the breakdown of ATP; involves symporters and antiporters
- phagocytosis
- type of endocytosis in which large solid particles are taken in
- pinocytosis
- type of endocytosis that involves the nonselective uptake of tiny droplets of extracellualr fluid
- exocytosis
- movememnt of materials out of the cell by fusing of secretory vesicles w/ the plasma membrane
- receptor mediated endocytosis
- process that allows a cell to take specific ligands from the ECF by forming vesicles
- trancytosis
- vesicular movement involving endocytosis on on eside of a cell and subsequent exocytosis on the opposite side of the cell
- cations
- a positively charged ion
- anions
- a negatively charged ion
- which atom in H2O has greater electronegativity?
- the oxygen atom than the hydrogens
- Why would you expect ammonia to form hydrogen bonds with water molecules?
- the N atom in ammoni ais electro negative; it attracts electrons stronger tha H atons; the nitrogen end has a slight negative charge whic hattracts the H's
- exergonic rxn
- reactants have more potential energy than the products
- does a catalyst change potential energies?
- NO. a catalyst lowers the activation energy needed to get a rxn going
- phospholipid bilayer: hydrophilic and hydrophobic
- polar head is hydrophilic and the nonpolar tail is hydrophobic
- amino acid-minimum number of C and N atoms?
- 2 carbon and 1 nitrogen