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9 January, 23:38

48.

Which chemical is not found in DNA nucleotides?

thymine

guanine

ribose

deoxyribose

+5
Answers (2)
  1. 9 January, 23:47
    0
    Ribose

    Explanation:

    DNA is a large molecule, a type of nucleic acid which store and act as a genetic material of the cell. DNA molecule is formed by the repeating monomer units called nucleotides.

    Each nucleotide is made up of three subunits as:

    1. 5-C sugar: De-oxyribose formed by the removal of oxygen group from 2' OH group of ribose. Ribose is the sugar molecule present in RNA nucleic acid.

    2. Phosphate group (PO₄³⁻)

    3. Nitrogenous bases: adenine, guanine, adenine and cytosine.

    Thus, ribose is the correct answer.
  2. 9 January, 23:54
    0
    Ribose. it's simple. you can immediately eliminate deoxyribose because DNA stands for deoxyribonucleic acid. and thymine and guanine are nitrogen bases which are found in DNA.
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