HiSET Science Practice Questions - HiSET High School Equivalency Test - Science Subtest Exam

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DNA is made of repeating units called nucleotides. Each nucleotide contains a sugar, a phosphate group, and a nitrogenous base. Which base always pairs with adenine (A) in a DNA double helix?

Guanine (G) Cytosine (C) Uracil (U) Thymine (T)

Correct Answer:

Thymine (T)

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