Human Biology: Concepts and Current Issues (8th Edition)
8th Edition
ISBN: 9780134042435
Author: Michael D. Johnson
Publisher: PEARSON
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Chapter 2, Problem 14TY
Synthesis of proteins requires the input of energy, which can be provided by:
a. enzymes
b. synthesis of ATP from ADP and Pi
c. hydrolysis of ATP to form ADP and Pi
d. amino acids
e. isotopes
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Boiling rigatoni noodles (wheat flour noodles) in water results in:
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Chapter 2 Solutions
Human Biology: Concepts and Current Issues (8th Edition)
Ch. 2 -
1. Who do you think should be responsible for...Ch. 2 - Prob. 2QCCh. 2 - Describe the electrical charges and relative...Ch. 2 -
2. Explain why two atoms of hydrogen tend to...Ch. 2 -
3. Explain why polar and charged molecules tend...Ch. 2 - How is a covalent bond different from an ionic...Ch. 2 - Compare and contrast potential energy and kinetic...Ch. 2 - Distinguish between saturated and unsaturated...Ch. 2 - Describe the process known as dehydration...Ch. 2 - Explain why proteins come in an almost unlimited...
Ch. 2 -
9. Discuss the importance of enzymes in living...Ch. 2 -
10. Describe the role of ATP in energy transfer...Ch. 2 - If a molecule of starch is repeatedly hydrolyzed,...Ch. 2 - Which of these molecules would be described as...Ch. 2 -
3. _______bonds form between the oxygen and...Ch. 2 - 13C and 14C are ______ of carbon. a. isotopes b....Ch. 2 - Which of the following substances has the lowest...Ch. 2 - When sugar is dissolved in water, sugar is the...Ch. 2 - A monosaccharide is to a polysaccharide as an...Ch. 2 -
8. Which of these bonds is the easiest to...Ch. 2 -
9. The primary structure of a protein is...Ch. 2 -
10. DNA ultimately contains the instructions for...Ch. 2 - If one strand of DNA has the sequence...Ch. 2 - Which of the following is true regarding the...Ch. 2 -
13. Which of the following is true regarding...Ch. 2 - Synthesis of proteins requires the input of...Ch. 2 - Prob. 15TYCh. 2 - Prob. 1AWKCh. 2 - Prob. 2AWKCh. 2 - Many people use cholesterol-lowering drugs to...Ch. 2 - Prob. 4AWKCh. 2 -
5. Coca-Cola is a very acidic drink; its pH is...
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- Which of the following is/are epimer/s of glucose?* A. Galactose only B. Mannose only C. Fructose only D. Galactose and mannose only E. Galactose, mannose, and fructosearrow_forwardIn the digestion of Carbohydrates, the more complex carbohydrate molecules are broken down into smaller molecules such as the Monosaccharides. This breakdown of complex carbohydrate into simple sugars is an example of: a. Catabollism b. Anabolismarrow_forwardCatalase, sucrase, lactase are examples of... A. simple sugars B. nitrogen bases C. enzymes D. lipidsarrow_forward
- Which of the following is not a function of a protein? A. Long term energy storage B.Repair body tissues C.Allows metabolic reactions to take place D.They catalyze reactionsarrow_forwardWhich of the following polysaccharides cannot be cleaved with ?α-amylase, a glycosidase that catalyzes the hydrolysis of ?α 1-4 glycosidic bonds. Select all that apply a. Amylopectin b. Glycogen c. Chitin d. Cellulose e. Amylosearrow_forwardWhich of the following is true about the phosphorylation of proteins? A. Proteins are usually phosphorylated at amino acids that have hydroxyl group-containing side chains. B. Phosphorylation of proteins is catalyzed by phosphatases. C. Phosphoryation always activates enzymes. D. The specificity in phosphorylation is conferred solely by the amino acid to be phosphorylated.arrow_forward
- Cells need to be buffered because A. they need to be able to increase or decrease their cytosolic pH to adapt to various environmental conditions. B. their proteins work best at low pH. C. they need to maintain a specific cytosolic pH to keep biomolecules from being ionized. D. they need to maintain a specific cytosolic pH to keep biomolecules at their optimal ionic state.arrow_forwardwhich of the following statements are correct?a. coenzyme is an alternate name for all cofactors b. metal ions can function as cofactors c. all conjugated enzymes contain cofactorsarrow_forwardMilk forms cottage cheese when: a. the triglycerides in milk are lyophilized to fatty acids and glycerol by amylose b. probiotic bacteria ferment lactose sugar to lactic acid c. the pH is lowered below pH 4.6 d. the salt bridges stabilizing the functional 3-dimensional structure of casein proteins are disrupted e. sunflower oil is emulsified by the lecithin in egg white albumenarrow_forward
- Which of the following is not true about enzymes? a. They are consumed by the reactions they catalyze. b. They are usually made of amino acids. c. They lower the activation energy of chemical reactions. d. Each one is specific to the particular substrate(s) to which it binds.arrow_forwardA histidine side chain is known to have an important role in the catalytic mechanism of an enzyme; however, it is not clear whether histidine is required in its protonated (charged) or unprotonated (uncharged) state. To answer this question you measure enzyme activity over a range of pH, with the results shown in the figure below. 120 100 80 40 20 8 9 10 pH 7 Which form of histidine is required for enzyme activity? O The charged, protonated form of histidine is required for enzyme activity. The charged, deprotonated form of histidine is required for enzyme activity. The uncharged, protonated form of histidine is required for enzyme activity. O The uncharged, deprotonated form of histidine is required for enzyme activity. activity (% of maximum)arrow_forward1. Regarding proteins, what is meant by the following terms? A. Zwitterion B. pI C. Isoelectric point D. denaturation E. Catalyst F. Cofactor G. Coenzyme 1a. Why are proteins catalysts known as enzymes necessary to sustain life processes?  1b. Describe the interaction between enzyme and its substrate.arrow_forward
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