4. The 20 L-amino acids that comprise proteins share a common structural feature. Draw the general structure of an amino acids. Look up the names and structure of these 20 amino acids and classify them as: a. Nonpolar, aliphatic R groups b. Aromatic c. Polar, uncharged R group d. Postively charged R-groups e. Negatively charged R-groups nces 5. Monosaccharides are identified by the suffix, -ose. In addition to the number of carbons present (trioses, tetroses, pentoses and hexoses) monosaccharides are either ketoses or aldoses. What chemical difference between a ketose and aldose? Name and draw the structures (linear or chair) of the ketohexose and aldohexose components of the most popular disaccharide: sucrose. 6. Phospholipids are important structural lipids in fish. Give an example of such lipids. What molecules results when this phospholipid is hydrolyzed?

4. The 20 L-amino acids that comprise proteins share a common structural feature. Draw the general structure of an amino acids. Look up the names and structure of these 20 amino acids and classify them as: a. Nonpolar, aliphatic R groups b. Aromatic c. Polar, uncharged R group d. Postively charged R-groups e. Negatively charged R-groups nces 5. Monosaccharides are identified by the suffix, -ose. In addition to the number of carbons present (trioses, tetroses, pentoses and hexoses) monosaccharides are either ketoses or aldoses. What chemical difference between a ketose and aldose? Name and draw the structures (linear or chair) of the ketohexose and aldohexose components of the most popular disaccharide: sucrose. 6. Phospholipids are important structural lipids in fish. Give an example of such lipids. What molecules results when this phospholipid is hydrolyzed?

World of Chemistry, 3rd edition

3rd Edition

ISBN:9781133109655

Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Chapter21: Biochemistry

Section: Chapter Questions

Problem 2A

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Similar questions

What functional groups are found in all amino acids? How many different amino acids are found in naturally occurring proteins?
Give an example of amino acids that could give rise to the interactions pictured in Fig. 21-24 that maintain the tertiary structures of proteins.
. How many unique amino acid sequences are possible for a tripeptide containing only the amino acids gly, ala, and cys, with each amino acid occurring only once in each molecule?
Do the amino acid sequences: valine-asparagine and asparagine-valine represent the same compound? Explain.
In what way is the structure of glycine different from that of the other 19 common amino acids?
To which family of mirror-image isomers do nearly all naturally occurring amino acids belong?
(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.
What special role does the amino acid cysteine have in the peptides vasopressin and oxytocin?
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.
What element is always present in proteins that is seldom present in carbohydrates and lipids?
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 ______.
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.