Principles of Biochemistry, 5th Edition

Principles of Biochemistry, 5e (Moran/Horton/Scrimgeour/Perry/Rawn) Chapter 1 Introduction to Biochemistry 1) Wohler showed that a chemical found only in living organisms can be made from inorganic substances when he synthesized . A) Ammonium cyanate B) Amino acids C) Urea D) Uric acid Answer: C Page Ref: Section 1-1 2) The lock-and-key theory described the action of A) enzymes as keys that fit different chemicals. B) substrates as keys that fit different enzymes. C) enzymes as locks that fit other enzymes. D) substrates as locks that fit different enzymes. Answer: B Page Ref: Section 1-1 3) According to Crick's Central Dogma of molecular Biology, there can be NO transfer of information from A) DNA to RNA. B) RNA to RNA. C) RNA to protein. D) protein to RNA. Answer: D Page Ref: Section 1-1 4) What is the correct order in which these key breakthroughs in biochemistry occurred? I. Watson and Crick DNA structure II. Crick Central dogma III. Avery, MacLeod and McCarty DNA work on Streptococcus IV. Widespread use of computers A) I, II, III, IV B) III, I, II, IV C) II, I, III, IV D) IV, III, I, II Answer: B Page Ref: Section 1-1