Chapter 4 Test Banks Study Guide Questions And Correct Answers

energy currency of living organisms {Ans: ATP}thiol {Ans: -SH}13) A carbon atom is most likely to form what kind of bond(s) with other atoms? A) ionic B) hydrogen C) covalent D) ionic bonds, covalent bonds, and hydrogen bonds {Ans: C) covalent}5) Stanley Miller's 1953 experiments supported the hypothesis that ________. A) life on Earth arose from simple inorganic molecules B) organic molecules can be synthesized abiotically under conditions that may have existed on early Earth C) life on Earth arose from simple organic molecules, with energy from lightning and volcanoes D) the conditions on early Earth were conducive to the origin of life {Ans: B) organic molecules can be synthesized abiotically under conditions that may have existed on early Earth}31) Which of the functional groups is not reactive but serves as a recognizable tag on the DNA molecule and alter the expression of genes in the cells. A) amino B) methyl C) carboxyl D) hydroxyl {Ans: B) methyl}3) The experimental approach taken in current biological investigations presumes that ________. A) simple organic compounds can be synthesized in the laboratory from inorganic precursors, but complex organic compounds like carbohydrates and proteins can be synthesized only by