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- At the center of all 20 standard amino acids is what is termed the a-carbon that is covalently bonded with four other chemical groups. Which of these four chemical groups is not a normal component of all amino acids? A. an amino group B. a carboxyl group C. a side chain (R group) D. a methyl groupIn the side chain of the amino acid E, there is a carboxylate group attached to the— α-carbon atom. β-carbon atom. γ-carbon atom. δ-carbon atom. ε-carbon atom.Which 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
- Which of the following pairs of amino acids can form hydrogen bonds between their side-chain groups? Draw the pairs that can hydrogen bond through their side chains and indicate the hydrogen bonds.(a) Phe, Thr (b) Asn, Ser (c) Thr, Tyr (d) Gly, TrpDraw one of the 20 amino acids and label the aminogroup, the carboxyl group, the R group (side chain), andthe a carbon.Which of the following group(s) can be found in both an amino acid and a protein? a. Rgroup (side chain) only b. Free amino group and carboxyl group c. Free amino group, free carboxyl group and R groups d. Carbonyl group and free amino group and R groups
- Match the amino acid description with their 3-letter abbreviation has the guanidino group on its side chain Has the phenolic group side chain is a methyl group Capable of forming a covalent bond Acidic amino acid A. Arg B. Tyr C. Ala D. Cys E. Asp F. PheWhich of the following amino acids have R groups that have hydrogen- bonding potential? Ala, Gly, Ser, Phe, Glu, Tyr, Ile, and ThrWhich of these are considered “part” of each amino acid? A. Carboxyl acid group B. All of the options are correct C. R Group D. Amino group
- Which of the following statements is true about amino acids? a. All twenty (20) of these protein-derived amino acids are a-amino acids, meaning that the amino group is located on the carbon alpha to the carboxyl group. b. For nineteen (19) of the twenty (20) amino acids, the a-amino group is primary. Glycine is different; its a-amino group is secondary. c. With the exception of proline, the a-carbon of each amino acid is a chiral center. As shown in Table 27.1, all 19 chiral amino acids have the same relative d. Both a & cWhich of the following amino acids contains an R group that can form hydrogen bonds? A.isoleucine B.tyrosine C.glutamine D.asparagine E.alanineDuring the formation of the peptide bond which of the following takes place? A. Hydroxyl group is lost from its Carboxyl group of one amino acid and a hydrogen atom is lost from its amino group of another amino acid B. Hydrogen atom is lost from its Carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid C. Hydroxyl group is lost from its Carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid D. Hydrogen atom is lost from its Carboxyl group of one amino acid and a hydrogen atom is lost from its amino group of another amino acid
