1. Click to edit Master title style Click to edit Master subtitle style CLICKER QUESTIONS For CAMPBELL BIOLOGY, NINTH EDITION Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson © 2011 Pearson Education, Inc. Carbon and the Molecular Diversity of Life Chapter 4 Questions prepared by William Wischusen Louisiana State University Jung Choi Georgia Institute of Technology

2. © 2011 Pearson Education, Inc. What functional group is commonly used in cells to transfer energy from one organic molecule to another? a) carboxyl b) sulfhydryl c) hydroxyl d) phosphate e) amino

3. © 2011 Pearson Education, Inc. The Miller-Urey experiment, shown below, a)showed that the conditions of early Earth were inhospitable to life b)demonstrated that amino acids and other organic molecules form under conditions that may have existed on Earth before life began c)proved that life could originate from inorganic chemicals d)both B and C

4. © 2011 Pearson Education, Inc. Based on carbon’s valence (4), how many different molecular shapes can be made from 6 carbons? a)1 b)2 c)4 d)6 e)more than 6

5. © 2011 Pearson Education, Inc. Silicon (atomic number 14, atomic weight 28) is in the same column as carbon in the periodic table of the elements (Group IV). Why isn’t life on Earth based on silicon, instead of carbon? a)Silicon is far more rare than carbon in the Earth’s crust b)Silicon cannot form polar covalent bonds with oxygen c)Silicon has a different valence than carbon d)Silicon compounds often have very different physico- chemical properties than the analogous carbon compounds e)Silicon is not present in the environment in a form that can be used by living organisms

6. © 2011 Pearson Education, Inc. How many isomers can you make from the molecular formula C 6 H 12 O 6 ? a)1 b)2 c)4 d)6 e)more than 6

7. © 2011 Pearson Education, Inc. Given a chemical formula for an organic molecule, (e.g., C 6 H 12 O 6 ), one can usually deduce its a)Structure b)Molecular weight c)Solubility in water d)All of the above e)Molecular weight and solubility in water

8. © 2011 Pearson Education, Inc. Is this molecule soluble in water? a)yes b)no

9. © 2011 Pearson Education, Inc. Compared to a carbon atom with only single covalent bonds, a carbon with a double bond a)Shares fewer electron pairs with other atoms b)Is more flexible in the spatial arrangement of its bonds c)Has a planar configuration of its electron orbitals rather than a tetrahedral configuration d)Is more polar

10. © 2011 Pearson Education, Inc. The general structure of amino acids are shown in this figure. What functional groups are highlighted in salmon and yellow, respectively? a)Amino and carbonyl b)Hydroxyl and carbonyl c)Amino and carboxyl d)Methyl and carboxyl e)Methyl and hydroxyl

11. © 2011 Pearson Education, Inc. The central carbon in amino acids is asymmetric in all amino acids except: a)Glycine (R = -H) b)Alanine (R = -CH 3 ) c)Aspartate (R = -CH 2 COOH) d)Cysteine (R = -CH 2 SH) e)All amino acids without exception