Concept explainers
(a)
Interpretation: The number of different primary structures possible for a four-amino-acid segment of a protein, if the segment contains three glycine units and one alanine unit has to be stated.
Concept introduction: The primary protein structure is the order of linking of the amino acids in proteins. The primary protein structure includes the number of amino acids linked, kind of amino acids present and the order of attachment of amino acids.
(b)
Interpretation: The number of different primary structures possible for a four-amino-acid segment of a protein, if the segment contains one glycine, one alanine, one valine, and one cysteine unit has to be stated.
Concept introduction: The primary protein structure is the order of linking of the amino acids in proteins. The primary protein structure includes the number of amino acids linked, kind of amino acids present and the order of attachment of amino acids.
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Organic And Biological Chemistry
- 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 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_forwardHow many different primary structures are possible for a four-amino-acid segment of a protein if the segment contains a. three glycine units and one alanine unit b. one glycine, one alanine, one valine, and one cysteine unitarrow_forward
- 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.arrow_forwardWhat element is always present in proteins that is seldom present in carbohydrates and lipids?arrow_forwardDraw a segment of the backbone of a protein that is long enough for three peptide linkages to be present.arrow_forward
- 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 ______.arrow_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_forwardWhat types of interactions can occur between the side chains of the following amino acids that would help maintain the tertiary structure of a protein? a. cysteine and cysteine b. glutamine and serine c. glutamic acid and lysine d. proline and leucinearrow_forward
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