Multiple Choice
In nucleic acid synthesis, which enzyme catalyzes the formation of phosphodiester bonds to join nucleotides together into a growing DNA or RNA strand?
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1. Introduction to Biochemistry
Nucleic Acids
Multiple Choice
Which nucleic acid provides the master genetic code that ultimately directs protein synthesis?
A
tRNA
B
DNA
C
rRNA
D
mRNA
Verified step by step guidance1
Understand the roles of different nucleic acids in the cell: tRNA (transfer RNA), rRNA (ribosomal RNA), mRNA (messenger RNA), and DNA (deoxyribonucleic acid).
Recall that DNA contains the master genetic code, which is the complete set of instructions for building and maintaining an organism.
Recognize that mRNA is synthesized from DNA and serves as a temporary copy of the genetic code that directs protein synthesis at the ribosome.
Note that tRNA and rRNA play roles in the process of translation, where proteins are assembled, but they do not contain the original genetic code.
Conclude that DNA is the nucleic acid that provides the master genetic code, as it stores the hereditary information that ultimately directs protein synthesis.
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