Answered: Draw a peptide with four different…

World of Chemistry

7th Edition

ISBN:9780618562763

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter21: Biochemistry

Section: Chapter Questions

Problem 5A

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What functional groups are found in all amino acids? How many different amino acids are found in naturally occurring proteins?
Draw a segment of the backbone of a protein that is long enough for three peptide linkages to be present.
(a) How many tripeptides can be made from glycine, alanine, and leucine, using each amino acid only once per tripeptide? (b) Write the structural formulas of these tripeptides and name them in the shorthand abbreviation used for showing amino acid sequences.
Which of the following are true concerning the chemical bond that forms between the carboxyl (RCOOH) group of one amino acid and the amino (RCNH2) group of another? a.The bond is called a peptide bond. b.It is formed by inserting a water molecule between them. c.It is formed by a dehydration reaction. d.A polypeptide has more of these bonds than a protein.
Which of the following describes the primary structure of proteins? a. The collective shape assumed by all of the chains in a protein containing multiple chains. b. The folding of an individual protein molecule. c. The regular repeated shape of the protein molecules backbone. d. The sequence of amino acids bonded together by peptide bonds.
To which family of mirror-image isomers do nearly all naturally occurring amino acids belong?
For the tripeptide SerArgIle which amino acid residues a. are hydrophilic b. are hydrophobic c. possess polar neutral R groups d. participate in two amide linkages
Fill in the blanks in the following statements: aThe order of the amino acids in a protein is the ______ structure of that protein. The _______ of the backbone chain of a protein is the secondary structure of that protein. The tertiary structure of a protein describes the ______ of the secondary structure. b Hydrogen bonding between the oxygen atoms of carbonyl groups and the hydrogen atoms of amide groups in the same protein chain gives the secondary structure, called the ______. c Hydrogen bonding between the oxygen atoms of carbonyl groups and the hydrogen atoms of amide groups in the adjacent protein chain gives the secondary structure, called the ______.
In a pleated sheet secondary structure for a protein a. describe the general shape of the protein backbone b. describe the general locations for the amino acid R groups
For the tripeptide AlaValGly which amino acid residues, if any, a. are hydrophilic b. are hydrophobic c. possess nonpolar R groups d. participate in two amide linkages
Identifying Amino Acids Which of the following molecules is an amino acid?
Do the amino acid sequences: valine-asparagine and asparagine-valine represent the same compound? Explain.

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Draw a peptide with four different amino acids. Name the peptide and describe the type of amino acid