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Concept explainers
Interpretation:
The Lewis diagram of the general structure of an amino acid is to be drawn.
Concept introduction:
The Lewis diagram shows the bonding between different atoms of a molecule and the lone pairs of electrons in the molecule. It shows how the valence electrons of an atom are arranged in the molecule. In Lewis diagram, two electrons between the atoms are indicated as a line to show bonding between atoms.
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Answer to Problem 1E
The Lewis diagram of the general structure of an amino acid is shown below.
Explanation of Solution
The Lewis structure of a compound shows how the valence electrons of an atom are arranged in the molecule. The molecular structures are given by its valence electrons and lone pairs on central atom.
The total number of valence electrons in an amino acid is the sum of valence electrons of two carbon atoms, valence electrons of four hydrogen atoms, valence electrons of one nitrogen atom and valence electron of two oxygen atoms. There are four valence electrons on carbon atom, one valence electron on each hydrogen atom, five valence electrons on nitrogen atom and six valence electrons on each oxygen atom. Therefore, the total number of valence electron in an amino acid is
Figure 1
The Lewis diagram of the general structure of an amino acid is shown in Figure 1.
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Chapter 22 Solutions
Introductory Chemistry: An Active Learning Approach
- What functional groups are found in all amino acids? How many different amino acids are found in naturally occurring proteins?arrow_forwardWhich 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.arrow_forwardWhat is the basis for deciding if a substance is a lipid?arrow_forward
- To which family of mirror-image isomers do nearly all naturally occurring amino acids belong?arrow_forwardIn what way is the structure of glycine different from that of the other 19 common amino acids?arrow_forwardDraw a segment of the backbone of a protein that is long enough for three peptide linkages to be present.arrow_forward
- At room temperature, amino acids are solids with relatively high decomposition points. Explain why.arrow_forwardWhich 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.arrow_forward(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.arrow_forward
- 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 linkagesarrow_forwardGive an example of amino acids that could give rise to the interactions pictured in Fig. 21-24 that maintain the tertiary structures of proteins.arrow_forwardFill 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 ______.arrow_forward
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