How are the nucleotides for mrna different than the ones for dna?

The DNA stands for deoxyribonucleic acid and mRNA stands for messenger ribonucleic acid. The pyrimidine base of DNA is thymine while the mRNA base is uracil. DNA is present inside the nucleus of the cell while mRNA exists in the cytoplasm after the diffusion process. It is double helix strand while the mRNA is single-stranded structure. DNA contains the information of protein-encoding while the mRNA contains the information of cell enabling the synthesis of protein.

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate     (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.

the answer to your question is b