Problem Set 3 S09 KEY

Problem Set 3 S09 KEY - Problem Set 3 Chapters 8-10 BILD1 /...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Problem Set 3 BILD1 / Spring 2009 Chapters 8-10 Dr. Kiger 1 Metabolism 1) Choose the pair of terms that correctly completes this sentence: Catabolism is to anabolism as _____ is to _____. A) exergonic; spontaneous B) exergonic; endergonic C) free energy; entropy D) work; energy E) entropy; enthalpy 2) If an enzyme has been inhibited noncompetitively, A) the Δ G for the reaction it catalyzes will always be negative. B) the active site will be occupied by the inhibitor molecule. C) raising substrate concentration will increase inhibition. D) more energy will be necessary to initiate the reaction. E) the inhibitor molecule may be chemically unrelated to the substrate 3) Which of the following characteristics is not associated with allosteric regulation of an enzyme's activity? A) A mimic of the substrate competes for the active site. B) A naturally occurring molecule stabilizes a catalytically active conformation. C) Regulatory molecules bind to a site remote from the active site. D) Inhibitors and activators may compete with one another. E) The enzyme usually has a quaternary structure. 4) In this branched metabolic pathway, a red arrow with a minus sign symbolizes inhibition of a metabolic step by an end product: Which reaction would prevail if both Q and S were present in the cell in high concentrations? A) L M B) M O C) L N D) O P E) R S
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Problem Set 3 BILD1 / Spring 2009 Chapters 8-10 Dr. Kiger 2 5) What is the correct label for "A"? 6) Which of the following reactions would be endergonic? A) HCl H+ + Cl- B) C6H12O6 + 6 O2 6 CO2 + 6 H2O C) ATP ADP + Pi D) glucose + fructose sucrose E) all of the above 7) The binding of an allosteric inhibitor to an enzyme causes the rate of product formation by the enzyme to decrease. Which of the following best explains why this decrease occurs? A) The allosteric inhibitor binds to the active site, preventing the substrate from binding. B) The allosteric inhibitor causes free energy change of the reaction to increase. C) The allosteric inhibitor causes a structural change in the enzyme that prevents the substrate from binding at the active site. D)
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/11/2009 for the course BILD 1 taught by Professor Kiger during the Spring '09 term at CSU Northridge.

Page1 / 5

Problem Set 3 S09 KEY - Problem Set 3 Chapters 8-10 BILD1 /...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online