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Amino acid: Quiz

  
  

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Question 1: What does the following picture show?

  β-alanine and its α-alanine isomer
  The amino acid selenocysteine
  The general structure of an alpha amino acid.
  The amino acid selenocysteine

Question 2: [4][6] ________ and leucine were also discovered around this time, in 1820.
Glutamic acidGlycineAlanineSerine

Question 3: What does the following picture show?

  The twenty-one amino acids found in eukaryotes, grouped according to their side chains' pKa's and charge at physiological pH 7.4
  Lysine with the carbon atoms in the side chain labeled
  The two optical isomers of alanine, D-Alanine and L-Alanine

Question 4: [45] This amino acid protects the plants from predators such as ________ and can cause illness in people if some types of legumes are eaten without processing.
ArthropodChelicerataLepidopteraInsect

Question 5: The ________ atom next to the carbonyl group is called the α–carbon and amino acids with a side chain bonded to this carbon are referred to as alpha amino acids.
CarbonUraniumOxygenAluminium

Question 6: These side chains can vary in size from just a hydrogen atom in ________, to a methyl group in alanine, through to a large heterocyclic group in tryptophan.
GlycineSerineGlutamic acidPhenylalanine

Question 7: [71] This aminoacyl-tRNA is then a substrate for the ________, which catalyzes the attack of the amino group of the elongating protein chain on the ester bond.
MitochondrionCell nucleusRibosomeCell (biology)

Question 8: Amino acids are molecules containing an ________ group, a carboxylic acid group and a side chain that varies between different amino acids.
AlcoholPyridineAmineAmide

Question 9: What does the following picture show?

  Lysine with the carbon atoms in the side chain labeled
  β-alanine and its α-alanine isomer
  The general structure of an alpha amino acid.
  The condensation of two amino acids to form a peptide bond

Question 10: In the alpha amino acids, the α–carbon is a chiral carbon atom, with the exception of ________.
AlanineGlutamic acidSerineGlycine
















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