Suppose you have two gas samples in fl exible containers with the same outside pressure and the same amount of gas in each. Sample A is at a temperature of 25 8C and Sample B is at 5 8C. Which of these statements is true? (A) Sample A occupies a larger volume and has lower density. (B) Sample A has higher density and a smaller volume. (C) Sample B has molecules moving at a greater average speed.
Biochemistry – Weeks 6-7 (Lectures 11, 12) Enzyme Control • The series of enzyme-catalyzed reactions constitutes a pathway • Feedback inhibition – final product blocks an early reaction and shuts down the whole series o Ex: In the biosynthesis of Cytidine, the final product inhibits the first step of the biosynthesis involving aspartate and the removal of HPO 2- 4 • Inhibitors decrease enzyme activity while activators increase enzyme activity Allosteric Enzymes: Concerted Control • R (relaxed) and T (tense) forms of an allosteric enzyme exist • Only RR and TT combinations are allowed; RT does not exist o The two subunits must have the same conformation in order to
