Which nucleic acid contains the nitrogenous base uracil? A. RNA B. DNA and RNA C. DNA

How many statement(s) is/are correct about nucleic acids.(i) Synthesis of nucleic acid is from 5' end to 3' end during replication or transcription.(ii)  DNA contains adenine, thymine, guanine and cytosine nitrogenous base and ribose pentose sugar.(iii) RNA contains adenine uracil, guanine and cytosine nitrogenous base and ribose pentose sugar.(iv) Secondary structure of DNA is double Helix structure which has hydrogen bonds.(v) RNA exist as single strand.(vi) r-RNA is the structural part of ribosome.(vii) α-helix and β-pleated sheet are secondary structure of DNA.

Nucleic acids are composed of nucleotides which have different nitrogenous bases. Which nitrogenous bases are pyrimidines? Uracil – Cytosine - Adenine Adenine – Guanine - Cytosine Thymine – Cytosine - Uracil Thymine – Guanine - Adenine Guanine - Thymine - Uracil

RNA differs from DNA in that it uses:Group of answer choicesuracil instead of adenine.uracil instead of guanine.guanine instead of uracil.uracil instead of thymine.

The following bases are found found in DNA except one:Select one:A.uracilB.cytosineC.adenineD.guanine

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