Multiple Choice
Which of the following is a way that RNA differs from DNA?
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15. Gene Expression
Introduction to Types of RNA
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Which type of organism has three different RNA polymerases?
A
Archaea
B
Bacteria
C
Viruses
D
Eukaryotes
Verified step by step guidance1
Understand the role of RNA polymerases: RNA polymerases are enzymes responsible for transcribing DNA into RNA. Different types of organisms have varying numbers of RNA polymerases.
Identify the types of organisms: The problem lists Archaea, Bacteria, Viruses, and Eukaryotes. Each of these has different cellular structures and processes.
Recall the number of RNA polymerases in each type: Eukaryotes have three distinct RNA polymerases (I, II, and III), each responsible for transcribing different types of RNA. Archaea and Bacteria typically have one RNA polymerase, while viruses rely on host machinery or have their own unique polymerases.
Consider the functions of eukaryotic RNA polymerases: RNA polymerase I transcribes rRNA, RNA polymerase II transcribes mRNA and some snRNA, and RNA polymerase III transcribes tRNA and other small RNAs.
Conclude that eukaryotes are the organisms with three different RNA polymerases, based on their complex cellular processes and the division of labor among the polymerases.
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