Biology: Life on Earth (11th Edition)
11th Edition
ISBN: 9780134168296
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 3MC
Which of the following statements is False?
a. In starch breakdown, water is formed.
b. In chitin, glucoses are linked as in cellulose.
c. Peptide bonds determine primary peptide structure.
d. Disulfide bridges are formed by covalent bonds.
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Chapter 3 Solutions
Biology: Life on Earth (11th Edition)
Ch. 3 - 1. Polar molecules
a. dissolve in lipids.
b. are...Ch. 3 - Which match is correct? a. monosaccharide-sucrose...Ch. 3 - 3. Which of the following statements is...Ch. 3 - Which of the following is not composed of...Ch. 3 - Prob. 5MCCh. 3 - 1. In organic molecules made of chains of...Ch. 3 - Prob. 2FTBCh. 3 - Proteins are synthesized by a reaction called...Ch. 3 - 4. A nucleotide consists of three parts: ______...Ch. 3 - 5. Fill in the following with the appropriate type...
Ch. 3 - Prob. 1RQCh. 3 - List the four principal classes of biological...Ch. 3 - What roles do nucleotides play in living...Ch. 3 - Prob. 4RQCh. 3 - Prob. 5RQCh. 3 - Describe the synthesis of a protein from amino...Ch. 3 - Where in nature do we find cellulose? Where do we...Ch. 3 - Based on their structure, sketch and explain how...Ch. 3 - Prob. 2ACCh. 3 - In an alternate universe where people could digest...
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- Which of the following pairs of amino acids stabilizes a fold in a polypeptide chain through ionic interaction at physiological pH? A. cysteine and cysteine B. phenylalanine and valine C. glutamate and lysine D. serine and threoninearrow_forwardWhich of the following statements about monosaccharides is true? A. Monosaccharides are classified according to the location of their carbonyl group. B. The penultimate chiral center of a monosaccharide determines its handedness. C. If the carbonyl group of a monosaccharide is terminal then it will react positively with Barfoed's and Seliwanoff's tests. D. The cyclization of monosaccharides results to the formation of a cyclic ether. E. The existence of anomers is due to the mutarotation along the reference carbonarrow_forwardWhat is the chemical difference between cellulose and chitin? Select one: a. Replacement of the hydroxyl group at C5 with an acetylated amino group b. Replacement of the hydroxyl group at C3 with an acetylated amino group c. Replacement of the hydroxyl group at C4 with an acetylated amino group d. Replacement of the hydroxyl group at C2 with an acetylated amino grouparrow_forward
- What type of intermolecular forces exist between the side chains of each of the following pairs of amino acids? a. isoleucine and valine c. Lys and Glu b. threonine and phenylalanine d. Arg and Asparrow_forwardWhich of the following statements concerning fatty acids is correct? a. Used to make phospholipids b. They all contain one or more double bonds. c. They are a constituent of sterols. d. They are strongly hydrophilic.arrow_forwardWhat structural feature makes possible the role of cellulose in biological systems? A. Cellulose polymers are linear molecules that form strong crystalline fibers. B. Cellulose fibers contain amorphous regions that can accommodate a large amount of water C. Cellulose have B-1,4 linkages which cannot be hydrolyzed by animal enzymes. D. Both A and B E. All of these.arrow_forward
- Unlike a phospholipid, cholesterol hasa. a glycerol backbone.b. a polar phosphate group.c. a multiple ring structure.d. unsaturated fatty acid chainsarrow_forwardWhich of the following is not a function of proteins? a. transport molecules b. acting as messengers c. supports the structure d. store genetic information What monomers join to form polypeptides? a. fatty acids b. nucleotides c. amino acids d. monosaccharides Which of the following is NOT a basic component of every amino acid? a. R group b. Amino group c. Carboxyl group d. Hydroxyl group What chemical bond links the amino group of one amino acid to the carboxyl group of the other? a. Ionic bond b. Peptide bond c. Covalent bond d. Hydrogen bondarrow_forwardSugars are technically called carbohydrates, referring to the fact that their formulae are only multiple of C(H₂O). Pentoses therefore have five carbons, ten hydrogens and five oxygen atoms. Ribose is a pentose. Choose from among the following another pentose. A. Fructose B. Ribulose C. Galactose D. Erythrose Monomers are bonded together by which of the following processes? A. Hydrolysis B. Non-hydration lysis C. Ionic Bonding D. Dehydration Synthesisarrow_forward
- Which one of the following statements comparing alpha keratin and silk fibroin is a true statement? A. Both protein compounds are stabilized by covalent interactions B. Both protein complexes are intracellularly located C. Both protein complexes are primarily alpha-helical in characterarrow_forwardProteins are the dominant structural and functional molecules in a cell. Which one of the following statements about proteins is NOT correct? A. The native conformation of a protein is usually arrived at very quickly after synthesis. B. Hydrogen bonding is the only type of bonding that gives rise to secondary structure. C. Urea denatures proteins by disrupting the interactions among non-polar (hydrophobic) amino acids D. Most proteins consist of a single polypeptide and thus do not have quaternary structure.arrow_forwardWhich of the following makes carbohydrates unique from the other biological macromolecules? Select one: a. Long-term energy storage is provided by carbohydrates. b. Carbohydrates contain a 1:2:1 ratio of carbon to hydrogen to oxygen. c. Carbohydrates are polymers that always form a ring structure. d. The monomers in carbohydrates are held together by peptide bonds.arrow_forward
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