Choose the ODD one out of the following terms given and name the CATEGORY to which the others belong:
Phosphate, RNA, Sugar, Nitrogenous base
Topic: Parts of a nucleotide
Answer
Odd term: RNA. Category of the others: PARTS OF A NUCLEOTIDE.
A NUCLEOTIDE — the basic unit of a nucleic acid — has exactly THREE components: a PHOSPHATE group a five-carbon SUGAR (deoxyribose in DNA, ribose in RNA) a NITROGENOUS BASE (adenine, guanine, cytosine, and thymine in DNA or uracil in RNA)
RNA is not a part of a nucleotide but a whole MOLECULE made of many nucleotides joined together.
THE DISTINCTION is one of SCALE — three components against the polymer they build. Whenever a list mixes parts with the whole they compose, that is the intended division.
The hierarchy: phosphate + sugar + base → NUCLEOTIDE → DNA or RNA → gene → chromosome.