Нуклеиновые кислоты

In the isoelectric state of α-amino acids... 

• do not have a charge

• have a negative charge

• have a positive charge

• do not know

The amphotericity of amino acids is conditioned... 

• the ability to form salts when interacting with acids and alkalis

• formation of salts when interacting with alkalis

• formation of salts when interacting with acids

• the ability to form intra-complex compounds

What product is formed as a result of decarboxylation of the amino acid glycine

• propanol

• propanamine-1

• 2-aminoethanol

• methanamine

Optical isomerism is not typical for … 

• 3-aminobutanoic acid

• 2-amino-2-methylpropanoic acid

• 2-aminopropanoic acid

• 2-aminobutanoic acid

The isoelectric point of the amino acid alanine is located in the medium whose reaction... 

• alkaline

• neutral

• slightly acidic

• strongly acidic

The amino acids that make up proteins are only... 

• compounds of the d-stereochemical series

• essential amino acids

• γ-amino acids 

• α-amino acids

THE NEUTRAL AMINO ACID IS:  

• ALANINE

• LYSINE

• GLUTAMIC ACID

• ASPARTIC ACID

What product is formed as a result of reductive amination of 2-oxo-3-methylbutanoic acid: 

• alanine

• valine 

• leucine   

• isoleucine

Name of aspartic acid by substitution nomenclature

• 3-aminobutanedioic acid

• 2-aminopentanoic acid

• 2-aminobutanedioic acid

• 2-hydroxypentanoic acid

Specify the number of chiral centers in the isoleucine molecule: 

• 1

• 2

• 3

• none