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

How many pyrimidine bases are present in both RNA and DNA?

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

The following are complementary bases in DNA:Group of answer choicesadenine and thymine.adenine and cytosine.guanine and thymine.guanine and uracil.

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.

Which two bases are present in equal amounts in a double-stranded DNA molecule? (1) cytosine and thymine (2) adenine and thymine (3) ade- nine and uracil (4) cytosine and uracil