CIRCL THE MOST CORRECT ANSWER, OTHERWISE FILL a. hydrogenation reaction b. decar

Question

CIRCL THE MOST CORRECT ANSWER, OTHERWISE FILL a. hydrogenation reaction b. decarboxylation reaction c. dehydration reaction d. acid-base reaction IN THE BLANKS 1) Amino acids form zwitterions through an intramolecular reaction 2) Which of the following statements concerning the standard amino acids is incorrect? a. all of them except one have at least one chiral center b. only the "left-handed" forms are utilized by eukaryotes c. there are 20 of them d. all of them contain a 2° amine functional group 3) The molecules that bind to the active sites of enzymes and are then converted to products by a catalyzed reaction are called: a. cofactors c. substrates d. initiators 4) DNA that has a foreign gene spliced into it is called a. recombined DNA c. recombinant DNA b. regenerated DNA d. reconstituted DNA 5) The structure that is formed when an enzyme and its substrate are combined into a single unit is called a (an) PLACE ANSWER HERE 6) Write the complete common name of the RNA nucleotide that contains the heterocyclic base guanine PLACE ANSWER HERE

Explanation / Answer

1. Amino acids form zwitter ions through an intramolecular acid-base reaction (option d). The amine group of the amino acid through its lone pair picks up the protn from carboxylic acid. Since the amino group accepts a proton it becomes a base and the carboxyl group loses a proton, acts acid and the reaction is called acid-base reaction.

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