The correct answer is b) deoxyglucose.
Nucleotides, which serve as the building blocks of DNA, consist of three main components: a phosphate group, a nitrogenous base, and a sugar. In the case of DNA, the sugar is specifically deoxyribose. Let’s break down the options:
- a) Inorganic phosphate: This is indeed a component of nucleotides. It helps form the backbone of DNA.
- b) Deoxyglucose: This is not a component of nucleotides. The correct sugar in DNA nucleotides is deoxyribose, which should not be confused with deoxyglucose.
- c) Nitrogenous base: Essential for the encoding of genetic information, these bases (adenine, thymine, cytosine, guanine) are integral to the structure of DNA.
- d) Deoxyribose: This is the correct sugar used in DNA structures and is a key component of nucleotides.
Therefore, deoxyglucose does not belong in the list of nucleotide components.