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Home Q & A Board Science-Related Homework Help Chemistry Organic Chemistry
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jene277 jene277
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2 years ago

Question 1.

Which one of the given amino acid does not have an L-isomer?

▸ valine

▸ leucine

▸ glycine

▸ alanine

▸ none of these

Question 2.

Which of the naturally occurring amino acids shown does not have the S configuration?

An illustration shows the Fischer projections of four compounds. The first compound labeled one (Roman numeral) has a three-carbon chain, in which C 1 is double bonded to an oxygen atom and single bonded to a hydroxyl group, O H. C 2 is single bonded to an N H 2 group on the left and to a hydrogen atom on the right. C 3 is a methyl group. The second compound labeled two (Roman numeral) has a three-carbon chain, in which C 1 is double bonded to an oxygen atom and single bonded to a hydroxyl group, O H. C 2 is single bonded to an N H 2 group on the left and to a hydrogen atom on the right. C 3 is an ethanethiol group C H 2 S H. The third compound labeled three (Roman numeral) has a three-carbon chain, in which C 1 is double bonded to an oxygen atom and single bonded to a hydroxyl group, O H. C 2 is single bonded to an N H 2 group on the left and to a hydrogen atom on the right. C 3 is a hydroxymethyl group. The fourth compound labeled four (Roman numeral) has a three-carbon chain, in which C 1 is double bonded to an oxygen atom and single bonded to a hydroxyl group, O H. C 2 is single bonded to an N H 2 group on the left and to a hydrogen atom on the right. C 3 is a secondary butyl group.


▸ I

▸ II

▸ III

▸ IV

▸ none of these
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Organic Chemistry

Organic Chemistry


Edition: 4th
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