Which one of the following statements is correct?
A) Genes are proteins that produce DNA.
B) Each organism has its own unique DNA code.
C) DNA relies upon five different building blocks as the alphabet of inheritance.
D) Differences among organisms reflect different nucleotide sequences in their DNA.
E) Each DNA molecule is a single strand of nucleotides.
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Explanation:
A
because a gene is the section of DNA required to produce one protein. Genes are typically hundreds or thousands of base pairs in length because they code for proteins made of hundreds or thousands of amino acids. Most genes contain the information needed to make functional molecules called proteins.