Answered: 1. Which best describes the…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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1. Which best describes the contribution of primary (1’) structure of polypeptides to the native conformation of proteins: a) Structure that results from intrachain interactions of amino acid side chains b) Structure that results from interchain interactions of amino acid side chains c) Structure that results from base pairing d) Structure that results from the linear sequence of amino acids from beginning to end of molecule. 2. What shapes result from secondary structure: a) β- helix & α-sheets b) α-helix and β-sheets c) ɗ-bilayers & β-domains d) µ-folds 3. Which best describes the contribution of tertiary (3’) structure of to the native conformation of polypeptides and proteins: a) Structure that results from intrachain interactions of amino acid side chains b) Structure that results from interchain interactions of amino acid side chains c) Structure that results from base pairing d) Structure that results from the linear sequence of amino acids from beginning to end of molecule 4. Which best describes the contribution of quaternary (4’) structure of polypeptides to the native conformation of proteins: a) Structure that results from intrachain interactions of amino B) Structure that results from interchain interactions of amino acid side chains c) Structure that results from base pairing d) Structure that results from the linear sequence acid side chains of amino acids from beginning to end of molecule 5. Which class or reactions results in the making of all macromolecules: a) dehydration synthesis of monomersà polymers with the loss of an H2O with the addition of each monomer b) hydrolysis with the addition of one H2O for each reaction c) oxidation with the loss of an e- d) reduction with the gain of an e- 6. Which class or reactions results in the degradation of all macromolecules: a) dehydration synthesis of monomersà polymers with the loss of an H2O with the addition of each monomer b) hydrolysis with the addition of one H2O for each reaction c) oxidation with the loss of an e- d) reduction with the gain of an e- 7. Native conformation of proteins may result from: a) hydrophobic interactions b) H-bonds c) ionic bonds d) covalent bonds e) all a-d may contribute to native conformation 8. Loss of native conformation by a protein: a) is always reversible b) is always irreversible c) always causes a loss of function d) is always valence variable 9. Translation is the flow of information from: a) DNAàDNA b) DNAà mRNA c) mRNAà polypeptide d) polypeptideà amino acids 10. Replication is the flow of information from: a) DNAàDNA b) DNAà mRNA c) mRNAà polypeptide d) polypeptideà amino acids 11. Transcription is the flow of information from: a) DNAàDNA b) DNAà mRNA c) mRNAà polypeptide d) polypeptideà amino acids 12. The sugars glucose, fructose, and inositol all have the same formula i.e. C6H12O6 yet they have 3 very similar but different structures. This is an example of: a) geometric isomers b) structural isomers c) stereo isomers d) none are correct 13. When a chain of carbons has all single C-C covalent bonds with a single C=C double bond such that the C backbone looks like this R1-C-C=C-C-R2 this molecule has two very different shapes. These 2 alternate shapes are called: a) geometric isomers b) structural isomers c) stereo isomers d) none are correct 14. The side chain of glycine is an H atom. Glycine is the only amino acid that does not have which type of isomer.: a) geometric isomers b) structural isomers c) stereo isomers d) none are correct 15. Which nitrogenous base is only found in DNA: a) adenine b) guanine c) thymine d) uracil 16. Which nitrogenous base is only found in RNA: a) adenine b) guanine c) thymine d) uracil 17. All nucleotides have the same organization, a phosphate group attached to a pentose (a 5 C sugar), and a nitrogenous base attached to the pentose as well. The polynucleotides (DNA & RNA) carry information in: a) the native conformation b) the backbone of the molecule c) the linear sequence of nitrogenous bases from beginà end d) the ribofusion 18. Polypeptides beginà end are: a) 5’ à 3’ b) 2’ à 5’ c) CO2H à NH2 d) NH2 à CO2H 19. Polynucleotides beginà end are: a) 5’ à 3’ b) 2’ à 5’ d) NH2 à CO2H 20. Polymerization of sugars results in: a) polypeptides b) polynucleotides c) polysaccharides d) polylipids 21. Polymerization of amino acids results in: a) polypeptides b) polynucleotides c) polysaccharides d) polylipids 22. Polymerization of nucleotides results in: a) polypeptides b) polynucleotides c) polysaccharides d) polylipids 23. Which is not a function of proteins: a) catalyzing reactions b) structural properties such as mechanical strength, shape, flexibility c) carries genetic information d) movement or contraction 24. The sidechain of the amino acid serine is -CH2-OH. Serine is classified as this type of amino acid (side chain): a) hydrophobic and nonpolar b) hydrophilic and polar c) acidic d) basic 25. All of the chemical reactions conducted by a specific organism: a) anabolism b) catabolism c) intermediary metabolism d) metabolism 26. All of the chemical reactions of a specific organism that result in the synthesis of biological molecules and employ ATP as a source of energy: a) anabolism b) catabolism c) intermediary metabolism d) metabolism 27. All of the chemical reactions of a specific organism that result in the synthesis of ATP and supply C for biosynthesis. : a) anabolism b) catabolism c) intermediary metabolism d) metabolism 28. What is the only usable form of energy for all known life i.e. within cells and used by proteins: a) glucose b) amino acids c) ATP d) fatty acids

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