500
1)Has a six-membered ring of carbon and nitrogen atoms.
1)Has a six-membered ring fused to a five-membered ring.
2)Composed of three parts: nitrogenous base, five-carbon sugar, and phosphate group.
2)The portion of this above unit without the phosphate group.
3) the sugar connected to the nitrogenous base in the nucleotides of RNA.
3)the sugar connected to the nitrogenous base in the nucleotides of DNA.
4)Cellular molecules have two polynucleotides that spiral around an imaginary axis, this forms a double helix. The double helix consists of two antiparallel nucleotide strands, which contain 4 different nitrogenous bases.
1) What is pyramidine?
1) What is purine?
2) What is a nucleotide?
2) What is a nucleoside?
3) What is ribose?
3) What is deoxyribose?
4) What is the basic three-dimensional structure of DNA?