Thursday, October 1, 2009
Thurs-Day 1
Bio 3/6- we explained and illustrated the effect of increasing enzyme concentration on the rate of enzyme activity/reaction given a set/constant concentration of its (complementary shaped) substrate; we showed that the reaction would increase with increasing enzyme concentration but would eventually reach a maximum rate and remain constant at that maximum even at higher enzyme concentration because there is only a limited quantity of substrate that can be catalyzed by a certain number of enzymes at once; any excess enzyme molecules would have no substrate to crash into and catalyze/help to hydrolyze.
We saw the same type of relationship when the concentration of enzyme is held constant and the concentration of substrate is increased. Eventually, all of the enzymes are "occupied"/saturated/temporarily bound to the substrate molecules so that any excess substrate will not be catalyzed; thus, at that point, the reaction rate remains constant at a maximum.
We then discussed the necessity and function of coenzymes that must bind to their inactive partner enzymes in order to "complete" the enzyme and make its "active site" the complementary shape of its substrate.
We made it to the last major important organic biomolecule type: nucleic acids.
DNA and RNA are the two main types of nucleic acids; there are small but significant differences between DNA and RNA: DNA is a double helix shaped polymer of nucleotides, RNA is a single helix shaped polymer of nucleotides; DNA contains the nitrogenous bases A,T,G, and C whereas RNA contains only A, U, G, and C.
Nucleic acids are made up of building blocks called nucleotides; each nucleotide has three components bonded together: a phosphate group, a 5-membered ring sugar, and a nitrogenous base. DNA has the Deoxyribose sugar, RNA has the Ribose sugar.
AP Chem- we finished our alkane combustion mixture problem and then did a mixture of two sulfide salts problem.
We saw the same type of relationship when the concentration of enzyme is held constant and the concentration of substrate is increased. Eventually, all of the enzymes are "occupied"/saturated/temporarily bound to the substrate molecules so that any excess substrate will not be catalyzed; thus, at that point, the reaction rate remains constant at a maximum.
We then discussed the necessity and function of coenzymes that must bind to their inactive partner enzymes in order to "complete" the enzyme and make its "active site" the complementary shape of its substrate.
We made it to the last major important organic biomolecule type: nucleic acids.
DNA and RNA are the two main types of nucleic acids; there are small but significant differences between DNA and RNA: DNA is a double helix shaped polymer of nucleotides, RNA is a single helix shaped polymer of nucleotides; DNA contains the nitrogenous bases A,T,G, and C whereas RNA contains only A, U, G, and C.
Nucleic acids are made up of building blocks called nucleotides; each nucleotide has three components bonded together: a phosphate group, a 5-membered ring sugar, and a nitrogenous base. DNA has the Deoxyribose sugar, RNA has the Ribose sugar.
AP Chem- we finished our alkane combustion mixture problem and then did a mixture of two sulfide salts problem.
# posted by C @ 12:03 PM 
