True or False: The form of dipeptide aspartylserine (Asp-Ser) obtained from two amino acids are drawn as:
True or False: The form of dipeptide aspartylserine (Asp-Ser) obtained from two amino acids are drawn...
19) The form of dipeptide aspatylserine (Asp-Ser) obtained from two amino acids, aspartic acid and serine, whose structures are shown here, is HiN-CH-C-0HIN-CH-C-0 CH2 CH OH aspartic acid serine A HN-CH-C-o-N-CH-C-o CH OH CH2 coo -(H-C-o-H-c-o CH OH CH2 HIN CH-C-N-CH-C-O CH OH CH H-CH-CH CH CH OH coo- 20) Where is the peptide bond located in this dipeptide? serine valine a) the CO-NH joining serine and the valine b) the doubly bonded oxygen just left of center between the...
true/false true/false Amino acids should be purchased of a health food store in powder form. Amino acids should be purchased of a health food store in powder form.
true or false. at physiological PH, nearly all amino acids have overall positive charge True False 1) At physiological pH, nearly all amino acids have an overall positive charge. 2) The dipeptide abbreviated as Gly-Lys is the same as the dipeptide abbreviated as Lys-Gly. tide 3) The peptide sequence Gly-Gly-Gly gives the primary structure of a tripeptide. 4) The u-helix is a secondary structure. 5) The triple helix of collagen is a tertiary structure.
22. Label three amino acids- Asp, His and Ser and substrate peptide bond in the following Chymotrypsin-catalyzed reaction mechanism and briefly describe their roles. Oxyanion hole Han Tetrahedral intermediate Acyl-enzyme Acyl-enzyme Oxyanion hole H- Tetrahedral intermediate Acyl-enzyme
True or False. Replace bold words to make statment true if false. When two protein chains combine to form an active protein, the structural level is quaternary. The peptide bonds that combine amino acids in a protein are ester bonds. The dipeptide Gly-Lis is the same as the dipeptide Lis-Gly
On paper draw a dipeptide, clearly showing the peptide bond joining the two amino acids together. If the two amino acids are valine and threonine, predict the overall charge of the dipeptide at pH 7. Do not forget to consider the amino (N-terminal) and carboxy (C-terminal) of the dipeptide, as well as the R groups. Select one: a. +2 b. -2 c. 0 d. -1 e. +1
How many unique dipeptides could be made from two different amino acids? Both amino acids do not have to be used in each dipeptide.
Which three statements about amino acids are true? Use this chart of amino acid structures for reference. Lysine has one stereocenter (chiral center). Methionine is a thiol. The Leu side chain does not form hydrogen bonds with other amino acids. The form of glycine used by the human body is D-glycine. Ser and Thr are polar amino acids. Proline has an overall charge at physiological pH (7.4).
1. The C-terminal amino acid of the hexapeptide, Asp-Ala-ser-Glu-Val-Arg is; 2. Which of the following would be observed in a person after one week of starvation? A. The brain uses glucose and ketone bodies B. Liver glycogen stores are only partially depleted due to an increase in gluconeogenesis C. Fatty acids from adipose stores are the major source of energy for red blood cells D. Muscle glycogen stores are used to maintain glucose E. Nitrogen balance is maintained because muscle...
Glutamine, tyrosine, leuonine, phenyalanine, histine, methalonine Draw a peptide bond between two of the amino acids above and name the dipeptide bond you have drawn