Question

which of the following could be a nucleotide of rna?
deoxyribose + phosphate group + thymine
deoxyribose + phosphate group + uracil
ribose + phosphate group + thymine
ribose + phosphate group + uracil

Explanation:

• RNA (ribonucleic acid) has ribose as its sugar component, not deoxyribose (which is in DNA). So options with deoxyribose can be eliminated.
• RNA uses uracil as a nitrogen - containing base instead of thymine (thymine is in DNA). So the option with ribose (sugar in RNA), phosphate group (common in nucleotides), and uracil (base in RNA) is correct.

Answer:

ribose + phosphate group + uracil