What Is Life? A Guide to Biology with Physiology
4th Edition
ISBN: 9781319065447
Author: Jay Phelan
Publisher: W. H. Freeman
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Chapter 3, Problem 8MC
Summary Introduction
Introduction:
Proteins are the building blocks of the body.
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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
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 reactions
Which 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.
Chapter 3 Solutions
What Is Life? A Guide to Biology with Physiology
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- Protease acts on proteins to convert them into amino acids. Which of the following statements is correct? a. Protease is produced in the salivary glands. b. All of the answers. c. The enzyme is protease and amino acids are the products. d. Amino acid is the substrate which acts on the enzyme. e. Protease is the substrate while amino acids are the products.arrow_forwardWhich of the following statements is False?a. Carbohydrates are the most efficient energy-storagemolecules by weight.b. Intrinsically disordered protein segments have mostlyhydrophilic amino acids.c. Nucleotides may act as energy-carrier molecules.d. Very acidic or salty solutions may denature proteins.arrow_forwardIn dehydration synthesis, watera. is removed from a protein.b. is added to a protein.c. is added to amino acids.d. is removed from amino acids.arrow_forward
- Which of the following is not a function of a protein? A. Support B. Transport C. Metabolic regulation D. Storage of genetic information E. Movementarrow_forwardCatalase, sucrase, lactase are examples of... A. simple sugars B. nitrogen bases C. enzymes D. lipidsarrow_forwardWhich 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_forward
- Which of the following statements is true of the β - oxidation of an unsaturated fatty acid? a. It is identical to the β-oxidation of a saturated fatty acid. b. It involves an extra step to convert a cis double bond to a trans double bond. c. It involves an extra step to convert a trans double bond to a cis double bond. d. It is completely different from the β-oxidation of a saturated fatty acid.arrow_forwardProteins are synthesized from: Select one: a Fatty acids. O b. Amino acids c. Carbon, Hydrogen and Oxygen d. Carbon, Hydrogen, Oxygen and Nitrogen. le (b) and (d) are correctarrow_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_forward
- Which of the following can be used to synthesize fatty acids? a. Glucose c. Both a and b b. Amino acids d.Neither a nor barrow_forwardAmong the given statements, which ones are correct about the biological functions and commercial uses of carbohydrates? A. Glucose serves as the substrate for photosynthesis in plants. B. Glycogen serves as a repository of glucose in the myocytes. C. The cell wall of plants is reinforced by a polymer of beta-D-glucose. D. Lactose is widely used as filler in tablets and capsules in the pharmaceutical industry. E. Corn extract is commercially hydrolyzed to yield fructose-rich sweeteners.arrow_forwardEnzymes play a fundamental role in cell function. Regarding the biochemistry of enzymes, which of the following statements is correct? A. Enzymes increase the number of molecules that get to the transition state. B. Enzymes increase the rate of a spontaneous reaction by lowering the ΔG. C. Enzymes increase the enthalpy (H) of the products compared to the reactants. D. Most enzymes can bind and react with a wide range of different substrate molecules.arrow_forward
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