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Which of the following is true about proteins? a. Peptides linkages are made between the side...
Which of the following is true about quaternary structures of proteins? a. It is the three-dimensional...
Which of the following is true about quaternary structures of proteins? a. It is the three-dimensional shape of a protein consisting of a single peptide chain. b. It is the three-dimensional shape of a protein consisting of a multiple peptide chains. c. It is the order of amino acids in the peptide chain. d. It is the number of alpha helices in the peptide chain.
In proteins, the peptide bond is formed between the carboxyl group of one AA and the...
In proteins, the peptide bond is formed between the carboxyl group of one AA and the amino group of a second. The four atoms in each peptide bond: terminate the protein are considered beta sheets insert kinks into alpha helices constitute nonpolar side chains form a rigid planar unit
Which of the following is true of secondary structure in protein folding? Pick ALL that apply....
Which of the following is true of secondary structure in protein folding? Pick ALL that apply. A. It involves hydrogen bonding. B. It involves the side chains. C. It involves hydrophobic interactions. D. It results in alpha helicies with the side chains hidden inside the helix. E. It results in beta-pleated sheets with side chains sticking out of the plain of the sheet. F. It involves the peptide backbone.
Review| Constants| Periodic Table Protein structure is conceptually divided into four levels, from most basic to...
Review| Constants| Periodic Table Protein structure is conceptually divided into four levels, from most basic to higher order Primary structure describes the order of amino acids in the peptide chain. Secondary structure describes the basic three-dimensional structures, a-helices and B sheets. Tertiary structure describes how the secondary structures come together to form an individual globular protein. Quatemary structure results from individual proteins coming together to form multi-subunit protein complexes Part A Complete the following vocabulary exercise relating to the level...
QUESTION 2 Select the CORRECT statements (chose all that are correct). Secondary protein structures are held...
QUESTION 2 Select the CORRECT statements (chose all that are correct). Secondary protein structures are held together by disulphide bridges/bonds. Alpha helices and beta sheets are common secondary protein structures. Tertiary protein structures are held together by covalent bonds only. Secondary protein structures are held together by hydrogen bonds only. All proteins have a quaternary protein structure. Amino acids linked with a peptide bond make up the primary protein structure.
2) At a pH greater than that of its isoelectric point, the structure of glycine is...
2) At a pH greater than that of its isoelectric point, the structure of glycine is a) H-CH-COOH b) H-CH-C00- c) H-CH-CO e) H-CH-COO COOH b) H-CH-C00- c) H-CH-COOH d) H-CH-COO NH2 NH2 NH2 NH3 NH 3) Which of the following structures can be destroyed by the dena structures can be destroyed by the denaturation of a protein? a) Only primary and tertiary structures of a protein. b) Only secondary, tertiary y secondary, tertiary, and quaternary structures of a protein....
(1) Found in the same percentage in all proteins. (2) Stabilized by H bonds between -NH...
(1) Found in the same percentage in all proteins. (2) Stabilized by H bonds between -NH and -CO groups. (3) Found in globular proteins. (4) Affected by amino acid sequence (5) Includes all 20 standard amino acids in equal frequencies (6) Hydrophobic interactions are responsible for the primary structure. Which statements are true regarding beta-sheets? (4 correct answers) Which statements are true regarding alpha-helices (3 correct answers) Which are true for both alpha-helices and beta-sheets? (3 correct answers) Which are...
QUESTION 7 Which of the following does not cause a protein to denature? O A heat...
QUESTION 7 Which of the following does not cause a protein to denature? O A heat 0 B. pH o detergent D. None of the above QUESTION 8 Repeating structural motifs, which make up secondary structures, such a alpha helices and beta sheets, are predominantly formed as a result of A hydrophobic interactions B. peptide bonds oC electrostatic interactions D. intramolecular hydrogen bonding QUESTION 9 Hydrophobic interactions could occur be Avaine and a nine B. aspartate and argnine C glutamine...
1. A. In order to translate DNA into peptides Nature uses codons that contain how many...
1. A. In order to translate DNA into peptides Nature uses codons that contain how many bases? 1 2 4 5 B. The major forces/bonds that holds phospholipid membranes together is _________________. van der Waal forces electrostatic interactions electrostatic interactions disulfides covalent bonds C. Which of the following is not a role that proteins play? Act as nutrients when taken in as a food source Catalyze reactions Form membranes Allow organisms to move (muscles) D. Biological membranes are semi-permeable. One...
True or false? True False Phenylalanine's side chain is more polar than tryptophan's or tyrosine's side chains....
True or false? True False Phenylalanine's side chain is more polar than tryptophan's or tyrosine's side chains. True False Almost all peptide bonds in proteins are in the trans configuration. True False In folded globular proteins, the side chains of hydrophobic amino acids are mostly buried in the interior of the protein. True False The peptides I-A-G-Y-L-S and S-L-Y-G-A-I are different molecules with different properties. True False Poly lysine will tend to form an alpha helix in solution at pH 6.8. True False Amyloidoses such as...
Which of the following is true about quaternary structures of proteins? a. It is the three-dimensional shape of a protein consisting of a single peptide chain. b. It is the three-dimensional shape of a protein consisting of a multiple peptide chains. c. It is the order of amino acids in the peptide chain. d. It is the number of alpha helices in the peptide chain.
In proteins, the peptide bond is formed between the carboxyl group of one AA and the amino group of a second. The four atoms in each peptide bond: terminate the protein are considered beta sheets insert kinks into alpha helices constitute nonpolar side chains form a rigid planar unit
Review| Constants| Periodic Table Protein structure is conceptually divided into four levels, from most basic to higher order Primary structure describes the order of amino acids in the peptide chain. Secondary structure describes the basic three-dimensional structures, a-helices and B sheets. Tertiary structure describes how the secondary structures come together to form an individual globular protein. Quatemary structure results from individual proteins coming together to form multi-subunit protein complexes Part A Complete the following vocabulary exercise relating to the level...
QUESTION 2 Select the CORRECT statements (chose all that are correct). Secondary protein structures are held together by disulphide bridges/bonds. Alpha helices and beta sheets are common secondary protein structures. Tertiary protein structures are held together by covalent bonds only. Secondary protein structures are held together by hydrogen bonds only. All proteins have a quaternary protein structure. Amino acids linked with a peptide bond make up the primary protein structure.
2) At a pH greater than that of its isoelectric point, the structure of glycine is a) H-CH-COOH b) H-CH-C00- c) H-CH-CO e) H-CH-COO COOH b) H-CH-C00- c) H-CH-COOH d) H-CH-COO NH2 NH2 NH2 NH3 NH 3) Which of the following structures can be destroyed by the dena structures can be destroyed by the denaturation of a protein? a) Only primary and tertiary structures of a protein. b) Only secondary, tertiary y secondary, tertiary, and quaternary structures of a protein....
QUESTION 7 Which of the following does not cause a protein to denature? O A heat 0 B. pH o detergent D. None of the above QUESTION 8 Repeating structural motifs, which make up secondary structures, such a alpha helices and beta sheets, are predominantly formed as a result of A hydrophobic interactions B. peptide bonds oC electrostatic interactions D. intramolecular hydrogen bonding QUESTION 9 Hydrophobic interactions could occur be Avaine and a nine B. aspartate and argnine C glutamine...
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