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Peptide: Quiz


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Question 1: A nonapeptide has nine amino acids (e.g., ________).

Question 2: A decapeptide has ten amino acids (e.g., ________ & angotensin I).
Corticotropin-releasing hormoneCalcitoninVasopressinGonadotropin-releasing hormone

Question 3: In this case the peptides are most often generated by ________ after electrophoretic separation of the proteins.
Disulfide bondAmino acidCysteineIn-gel digestion

Question 4: Another reason is that peptides have become instrumental in ________, allowing the identification of proteins of interest based on peptide masses and sequence.
ChromatographyEnzyme assayMass spectrometryAutopsy

Question 5: Peptides have recently been used in the study of ________ and function.
Protein foldingX-ray crystallographyProtein structureProtein structure prediction

Question 6: However, with the advent of better synthetic techniques, peptides as long as hundreds of amino acids can be made, including full proteins like ________.
PhosphorylationUbiquitinProtein biosynthesisMethylation

Question 7: Peptides (from the Greek πεπτίδια, "small digestibles") are short polymers formed from the linking, in a defined order, of α-________.
MetabolismAmino acid synthesisAmino acidL-DOPA

Question 8: The first and most important is that peptides allow the creation of peptide antibodies in animals without the need to purify the ________ of interest.

Question 9: ________ are polypeptide molecules (or consist of multiple polypeptide subunits).

Question 10: Long peptides, such as the amyloid beta peptide linked to Alzheimer's disease, can be considered proteins; and small proteins, such as ________, can be considered peptides.
InsulinAdiponectinGlucagonEndocrine system


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