Concept explainers
(a)
Interpretation: The interaction present in lysine and aspartic acid has to be stated.
Concept introduction: The four types of attractive forces that give rise to tertiary proteins are: covalent disulphide bonds, electrostatic attractions, hydrogen bonds and hydrophobic attractions.
(b)
Interpretation: The interaction present in threonine and tyrosine has to be stated.
Concept introduction: The four types of attractive forces that give rise to tertiary proteins are: covalent disulphide bonds, electrostatic attractions, hydrogen bonds and hydrophobic attractions.
(c)
Interpretation: The interaction present alanine and valine has to be stated.
Concept introduction: The four types of attractive forces that give rise to tertiary proteins are: covalent disulphide bonds, electrostatic attractions, hydrogen bonds and hydrophobic attractions.
(d)
Interpretation: The interaction present in leucine and isoleucine has to be stated.
Concept introduction: The four types of attractive forces that give rise to tertiary proteins are: covalent disulphide bonds, electrostatic attractions, hydrogen bonds and hydrophobic attractions.
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General, Organic, and Biological Chemistry
- 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.arrow_forwardWhat element is always present in proteins that is seldom present in carbohydrates and lipids?arrow_forwardWith the help of Table 20-1, identify the amino acids contained in each of the following tripeptides.arrow_forward
- 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 groupsarrow_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_forwardWhat is the basis for deciding if a substance is a lipid?arrow_forward
- Approximately how many different proteins are present in a typical human cell?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_forwardFor the tripeptide SerArgIle which amino acid residues a. are hydrophilic b. are hydrophobic c. possess polar neutral R groups d. participate in two amide linkagesarrow_forward
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