An amino acid with both negative and positive charges is known asGroup of answer choicesNucleotidezwitterionnucleosidetriglyceride

Which of the following amino acids has a negatively charged side chain at physiological pH?Group of answer choicesglutamineasparaginelysinemethionineglutamic acidarginine

Which of the following that contains a phosphate, sugar, and a nitrogenous base?Group of answer choicesTriglycerideNucleosideNucleotideAmino acid

If you take the sugar away from a nucleoside, you are left with aGroup of answer choicesbasenucleotidepolymerasedNTPanother nucleoside

Amino acids are found attached to which of the following molecules?Group of answer choicesDNAmRNAtRNArRNAHelicase

All nucleic acids must contain which of the following?Group of answer choicesribosedeoxyribosephosphate groupamino acids