GED Science : RNA and Transcription
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Example Questions
Example Question #1 : Rna And Transcription
Which of the following statements is false?
RNA is usually single-stranded, while DNA is usually double-stranded
The RNA backbone contains the carbohydrate ribose
RNA is more stable than DNA
RNA contains the nitrogenous base uracil
RNA is more stable than DNA
Because RNA is usually single-stranded (vs. double-stranded DNA), it is more susceptible to degradation by nucleases; therefore, RNA is NOT more stable than DNA.
RNA does contain the carbohydrate sugar ribose in its backbone, while DNA contains the sugar deoxyribose. RNA contains the nitrogenous base uracil; in contrast, DNA contains thymine.
Example Question #2 : Rna And Transcription
What is the name of the segment of DNA that RNA polymerase attaches to in order to initiate transcription?
Promoter
Origin of replication
Operator
Terminator
Promoter
Transcription is initiated when RNA polymerase attaches to DNA at the promoter site. This allows the RNA polymerase to be appropriately positioned so that the whole gene is transcribed.
The origin of replication is the site that allows the initiation of DNA replication. Operators are segments of DNA that can bind transcription factors and regulate certain genes.
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