QUESTION 24 Which of the following amino acids does not contain an aromatic R-group? O A)...
1. Which is a true statement about amino acids? a. They are amphiprotic b. The a-carbon has an ester attached c. They are symmetrical d. They are planar e. The α-carbon has a phosphate group attached 2. Which is an incorrect statement regarding the side chains of amino acids? a. Tryptophan, tyrosine, and phenylalanine contain an aromatic group. b. Isoleucine, and leucine are isomers of each other. c. Lysine and methionine contain an amine group. d. Threonine, serine, and tyrosine...
Which amino acid does not have a cyclic R-group? Phenylalanine Tyrosine Arginine Histidine
Which of the following amino acids may alter the direction of a polypeptide chain and cause a section of this chain to bend? a. phenylalanine b. serine c. proline d. histidine e. tryptophan
Indicate which of the amino acids on the left contains, within its R group, a moiety listed on the right. Clear All An aromatic group Leucine A sulfur atom Tyrosine An amide group Cysteine A branched hydrocarbon Asparagine None of the above moieties
Which of the following amino acids has an aliphatic R group? Which of the following amino acids has an aliphatic R group? tyrosine, leucine ,serine cysteine asparagine
#202 Dipeptides Which amino acids, in order left to right, are present in the following structure? HN OH Select one: O a. tyrosine, serine O b. tyrosine, threonine c. phenylalanine, threonine d. phenylalanine, valine e. phenylalanine, isoleucine O
Which of the following amino acids are NOT synthesized from phosphoenolpyruvate, an intermediate of the glycolysis pathway? Tryptophan Tyrosine Phenylalanine Threonine
17. Which of these amino acids has a thiol group as part of its side chain? a. cysteine tyrosine Aca histidine threonine e: alanine 18. Which structure correctly represents an amino acid zwitterion? C- OH. NH R CH C- OH NH, NH R- CHHC OH NH NH
A)
B)
Alkaptonuria (AKU) is a disorder that causes defects in metabolism of the amino acids phenylalanine and tyrosine, leading to a variety of symptoms (e.g. urine is black). AKU is a rare autosomal recessive disease. Based on the pedigree below, if persons A and B mate, what is the probability that their first child will have AKU? a. 1/48 c. 1/64 e. none of the above b. 1/96 Alkaptonuria (AKU) Is a rare autosomal disorder that causes defects in...
9) What type of attraction would you expect between the R groups of each of the following amino acids in a tertiary structure of a protein? (see Table 16.2) a) proline and phenylalanine b) Aspartate and arginine c) Tyrosine and water d) Cysteine and cysteine e) Serine and tyrosine f) Leucine and alanine 2
9) What type of attraction would you expect between the R groups of each of the following amino acids in a tertiary structure of a protein?...