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Concept explainers
(a)
Interpretation: The validation of the given statement about proteins has to be stated.
Concept introduction: Proteins on hydrolysis are broken down into smaller fragments known as amino acids. They are required by the human body for various biochemical purposes.
(b)
Interpretation: The validation of the given statement about proteins has to be stated.
Concept introduction: Proteins on hydrolysis are broken down into smaller fragments known as amino acids. They are required by the human body for various biochemical purposes.
(c)
Interpretation: The validation of the given statement about proteins has to be stated.
Concept introduction: Proteins on hydrolysis are broken down into smaller fragments known as amino acids. They are required by the human body for various biochemical purposes. The combination of amino acids gives peptide chains.
(d)
Interpretation: The validation of the given statement about proteins has to be stated.
Concept introduction: Proteins on hydrolysis are broken down into smaller fragments known as amino acids. They are required by the human body for various biochemical purposes. Prosthetic groups are the non-amino acid components.
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Chapter 20 Solutions
EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- At what level of protein structure does each of the following denaturation act? a. heat b. strong acid c. saturated salt solution d. organic solvents (e.g., alcohol or chloroform)arrow_forwardWhich of the following is incorrect? (₁) a. A heterodimer is composed by two identical polypeptide chains b. The polypeptide chains in a multimeric protein are called subunits A homotrimer can be represented with the Greek letter alpha with a sub-index 3 d. Monomeric proteins do not have quaternary structure c.arrow_forwardWhich of the following statements is/are TRUE for globular proteins? A. sensitive to changes in pH & heat B. regular amino acid sequence C. soluble in water D. structural rolearrow_forward
- Which of the following statement about quaternary structure of protein is correct? Select one: a. Quaternary structure is a force between different polypeptides. b. Hydrogen bond is an only force found in quaternary structure. c. Quaternary structure contains one polypeptide. d. Quaternary structure is an unfolded form of protein.arrow_forwardThe tertiary structure of a protein is established by: a. The sequence of amino acids in the protein b. The molecular weight of the protein c. The total number of amino acids in the protein d. The number of disulfide bridges in the protein e. The net charge of the the protein at physioloical pH.arrow_forwardWhich of the following statement about proteins is correct a. alpha helix and Beta pleated sheets are considered quaternary structures b. a single polypeptide only has primary sytructure, secondary, tertiary, and quaternary structures require more than one polypeptide c. there are 30 essential amino acids that are the monomer building blocks of proteins d. polypeptides have a distinct polarity (directionality) with one end refered to as the free amino end, and the other called the free carboxyl endarrow_forward
- A) List each of the five major functional classes of proteins. B) Discuss the function for each class, give an example of a protein for each class and mention how the function of the protein example fits the function of the class (40 words or less for each class with its examplearrow_forwardDefine the following terms:a. polypeptideb. peptidec. proteind. peptide bonde. standard amino acidsarrow_forwardWhen the amino acid sequence of Hb and Mb is compared, some of them are found to be the same (invariant). The reason that these residues are found in both proteins in the same positions is: (choose all the correct answers) a.They are residues found on the carboxyl terminal side of Mb and Hb that help their solubility. b.They are part of the surface of Hb and Mb that help their solubility. c.They are crucial residues for the function of these proteins. d.They are residues that have been conserved evolutionarily.arrow_forward
- The three-dimensional conformation of a protein may be strongly influenced by amino acid residues that are very far apart in sequence. This relationship is in contrast to secondary structure, where the amino acid residues are: a. always side by side. b. generally near each other in sequence. c. invariably restricted to about 7 of the 20 standard amino acids. d. often on different polypeptide strands. e. usually near the polypeptide chain's amino terminus or carboxyl terminus.arrow_forwardProteins often have regions that show specific, coherent patterns of folding or function. These regions are called: a. domains. b.oligomers. c. peptides. d. sites. e. subunits.arrow_forwardWhich of the following statements is incorrect? A.- the structure and charge of the proteins have direct effects on the rate of its migration through the gel matrix include b.- SDS is a type of a buffer with strong protein-denaturing effect and binds to the protein backbone at a constant molar ratio c.- SDS and polyacrylamide gel largely eliminates the influence of the structure and charge, and proteins are separated solely based on polypeptide chain length. d.When proteins are separated by electrophoresis through a gel matrix, smaller proteins appears at the lower portion of the gelarrow_forward
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