Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 8, Problem 5TYK
Summary Introduction
Introduction: In a biochemical reaction, free energy (G) is defined as the amount of energy available to perform work. Entropy (S) is a measure of how much energy a particular system has dispersed. The entropy of the system increases on heat dispersal, as molecule tends to disperse. This is a measure of randomness. Enthalpy (H) is the change in the energy of a
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Which of the following is true regarding proteins A. Absorbance of proteins is directly proportional to the molecular weights B.Proteins react with biuret reagent because of their side chains C. two out of the twenty amino acids can absorb at 280nm D. In proteins the average weight per amino acid residue always varies
At the isoelectric pH of a tetrapeptide:
a. only the amino and carboxyl termini contribute charge.
b. the amino and carboxyl termini are not charged.
c. the total net charge is zero.
d. there are four ionic charges.
e. two internal amino acids of the tetrapeptide cannot have ionizable R groups.
Describe the amino acid illustrated above (at pH = 7.0).A. it is a polar, negatively-charged amino acidB. it is a non-polar, negatively-charged amino acidC. it is a polar, positively-charged amino acidD. it is a non-polar, positively-charged amino acidE. it is a non-polar, uncharged amino acid
Chapter 8 Solutions
Study Guide for Campbell Biology
Ch. 8 - Complete the following concept map that summarizes...Ch. 8 - Complete the following table to indicate how the...Ch. 8 - Develop a concept map on free energy and G. The...Ch. 8 - Prob. 4IQCh. 8 - Prob. 5IQCh. 8 - In the following graph of an exergonic reaction...Ch. 8 - In the following diagram of a catalytic cycle,...Ch. 8 - Return to the diagram in Interactive Question 3.7,...Ch. 8 - Both ATP and ADP serve as regulators of enzyme...Ch. 8 - What is the relationship between the concept of...
Ch. 8 - What role do enzymes play in metabolism?Ch. 8 - ________ the totality of an organisms chemical...Ch. 8 - _______ pathways that use energy to synthesize...Ch. 8 - Prob. 3TYKFCh. 8 - _______ the most random form of energyCh. 8 - _______ term for the measure of disorder or...Ch. 8 - Prob. 6TYKFCh. 8 - _______ inhibitors that decrease an enzymes...Ch. 8 - Prob. 8TYKFCh. 8 - Prob. 9TYKFCh. 8 - Prob. 10TYKFCh. 8 - Catabolic and anabolic pathways are often coupled...Ch. 8 - Which statement most closely reflects the first...Ch. 8 - When a cell breaks down glucose, only about 34% of...Ch. 8 - Prob. 4TYKCh. 8 - Prob. 5TYKCh. 8 - Prob. 6TYKCh. 8 - One way in which a cell maintains metabolic...Ch. 8 - Prob. 8TYKCh. 8 - Prob. 9TYKCh. 8 - What is meant by an induced fit? a. The binding of...Ch. 8 - In an experiment, changing the pH from 7 to 6...Ch. 8 - Prob. 12TYKCh. 8 - Penicillin binds to the active site of an enzyme...Ch. 8 - Prob. 14TYKCh. 8 - Prob. 15TYKCh. 8 - Which line in the diagram indicates the G of the...Ch. 8 - Prob. 17TYKCh. 8 - Prob. 18TYKCh. 8 - Prob. 19TYKCh. 8 - Prob. 20TYK
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- The pKa of the protonated, positively charged form of the side chain of histidine is approximately 6. In a solution with a pH of 8, the side chain of histidine is most likely to be: A. twice protonated and charged. B. once protonated and uncharged. C. completely deprotonated and charged. D. once protonated and charged.arrow_forward.Amino acids a. have high dipole moments. b. are weak acids. c. with high molecular masses will be insoluble in water. d. are weak bases. Which statement is false?arrow_forwardWhich of the following statements about amino acids is true? A. Twenty two amino acids are commonly found in proteins. B. Amino acids are often linked together to form branched polymers. C. All amino acids contain an NH2 and a COOH group. D. Most of the amino acids used in protein biosynthesis have charged side chains.arrow_forward
- Define the following terms:a. sterol carrier proteinb. fatty acid binding proteinc. biotransformationd. de novoe. turnoverarrow_forwardObserve the structures of glucose and fructose in figure shown. These two molecules are H. H-C-OH Н—С—он C=0 но-с—н HO-C-H H-C-OH H-C-OH H-C-OH H-C-OH H-C-OH H-C-OH H H. glucose fructose A. geometric isotopes. B. enantiomers. C. stereoisomers. D. structural isomers.arrow_forwardThe pH vs charge graph for a triprotic amino acid is shown below. Please answer the following questions about the amino acid. 2 1.5 1 0.5 -0.5 -1 4 6. 8 10 12 14 pH a. Which of the following triprotic amino acids is this? [ Select ] b. What is the isoelectric point? (Please select the appropriate range in which the isoelectric point falls) (Hint - look up the pka values in the pKa table for amino acids, which was in video one of today's lecture) [ Select ] c. What form of this amino acid dominates at a pH of 8? Please select the correct form for each ionizable group. Alpha amino [ Select ] Alpha carboxyl [ Select ] R [ Select ] Net Chargearrow_forward
- Using this chemical equation: 3Na+AlCl3->3NaCl+Al If 16 g Na and 8 g AlCl3 are allowed to react, find a. the limiting reactant b. the excess reactant c. the grams of Al are formed in the chemical reaction.arrow_forwardWhich of the following bonding types is the most important in the nonaqueous interfaces between protein subunits? a. van der Waals interactions b. the hydrophobic effect c. ionic bonds d. disulfide bridgesarrow_forwardWhich of the following is not a function of proteins? Select one: a. Structure b. Catalysis c. Oxygen transport d. Energy transformation e. All of these are functions of proteinsarrow_forward
- What are the following is/are responsible for the denaturation of proteins? Select one: a. All of these b. Organic solvents c. pH change d. Heatarrow_forwardThe salt of diclofenac, a nonsteroidal anti-inflammatory drug (NSAID), has a chemical formula NaC14H10C2NO2. The structure of this drug is provided below. When dissolved in water, it produces: Na + H 'N. CI Select one: a. An acidic solution b. A basic solution C. A neutral solution d. Not enough information is provided. O OOarrow_forwardChoose all that apply: When a small, globular protein unfolds, which of the following are true? Choice 1 of 6:the temperature must increase Choice 2 of 6:the entropy of the peptide backbone increases Choice 3 of 6:the entropy of the solvent waters increases Choice 4 of 6:H bonds between peptide backbone atoms must break Choice 5 of 6:new attractive interactions form between water and side chains Choice 6 of 6:a detergent molecule must be addedarrow_forward
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