- TRUE about the peptide bond:
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- An ________ can help keep the pH of a solution stable. a. covalent bond c. buffer b. hydrogen bond d. free radicalWhat kinds of bonds often control the shape (or tertiary form) of large molecules such as proteins? a. hydrogen b. ionic c. covalent d. inert e. singleWhich of the following levels of protein structure may be affected by hydrogen bonding? (a) primary and secondary (b) primary and tertiary (c) secondary, tertiary, and quaternary (d) primary, secondary, and tertiary (e) primary, secondary, tertiary, and quaternary
- which of the following is not correct about peptide bonding? A- It occupies a single plane B- It can associate via H-bonding C- It has a double bond character D- It exhibits geometric isomerismWhich of the following does not contribute to the tertiary structure of protein? a. ionic interaction b. H-bond c. peptide bond d. hydrophobic interactionWhich of the following types of bonds are present in the primary structures of proteins? Covalent bonds, hydrogen bonds and dislufide linkages Ionic interactions Hydrogen bonds and covalent bonds Covalent bond
- Which of the following best represents the backbone arrangement of two peptide bonds? A) Ca—N—Ca—C—Ca—N—Ca—C B) Ca—N—C—C—N—Ca C) C—N—Ca—Ca—C—N D) Ca—C—N—Ca—C—N E) Ca—Ca—C—N—Ca—Ca—CWhich of the following group(s) can be found in both an amino acid and a protein? a. Rgroup (side chain) only b. Free amino group and carboxyl group c. Free amino group, free carboxyl group and R groups d. Carbonyl group and free amino group and R groupsWhich of the following is not a functional group that can bond with carbon? a. sodium b. hydroxyl c. phosphate d. carbonyl
- Which of the following statements is incorrect about disulfide bonds? a. They form between two cysteine amino acids.b. They are noncovalent.c. They contribute to the tertiary structure of some proteins.d. They contribute to the quaternary structure of some proteins.e. They involve the loss of two hydrogen atoms.The peptide bond is a stronger bond than the ester bond. What structural feature of the peptide bond gives it additional bond strength?What type of bonding is present in the primary structure of proteins? A. peptide bond B. hydrogen bond C. ionic bond D. more than one choice is correct
