Which of the following amino acids has a net charge of +2 at a low pH? Which has a net charge of -2 at high pH? Aspartic acid, alanine, arginine, glutamic acid, leucine, lysine
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Which of the following amino acids has a net charge of +2 at a low pH? Which has a net charge of -2 at high pH? Aspartic acid, alanine, arginine, glutamic acid, leucine, lysine
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- Which of the following pairs of amino acids can have intermolecular hydrogen bonding between the functional groups in their side chains? Select all that apply. phenylalanine and tyrosine two tyrosine residues serine and threonine alanine and threonineWhich of the following amino acids contains an R group that can form hydrogen bonds? A.isoleucine B.tyrosine C.glutamine D.asparagine E.alanineWhich of the following amino acids would be most soluble in water? Group of answer choices glycine at pH 8 proline at pH 6 valine at pH 1 leucine at pH 4 alanine at pH 7
- Which one of the following is an example of essential amino acid? Leucine Aspartic acid Arginine AlanineWhat type of intermolecular forces exists between the side chains of each of the following pairs of amino acids? serine and threonine isoleucine and valine arginine and aspartic acid cysteine and cysteineWhich of the following enzymes creates a covalent bond that links amino acids in a polypeptide? Protein disulfide isomerase Hsp70 Peptidyl-prolyl isomerase Calreticulin
- What kind of bond would you expect between the side chains of the following amino acids?(a) Cysteine and cysteine(b) Alanine and leucine(c) Aspartic acid and asparagine(d) Serine and lysineThe two amino acids having R groups with a negative net charge at pH 7.0 are _______ A. Aspartate and Glutamate B. Arginine and Histidine C. Cysteine and Methionine D. Proline and ValineWhich one of the following pairs are semi-essential amino acids for humans? A. Histidine and tryptophan B. Tyrosine and arginine C. Arginine and histidine D. Valine and lysine
- Which amino acid is most likely to have a net positive charge at a pH of 7.4? A) Histidine B) Cysteine C) Arginine D) SerineWhich of the following combination is are non-essential amino acids? A. Leucine and Isoleucine B. Isoleucine and Methionine C. Methionine and Asparagine D. Proline and AlanineWhich of the following statements is true regarding the classification of amino acids? Group of answer choices The side chain of a polar basic amino acid contains hydroxyl groups The side chain of a polar acid amino acid contains carboxyl groups The side chain of the non-polar amino acid can exhibit H-bonding. The side chain of a polar amino acid contains hydrocarbon groups only