Multiple Choice
Which nitrogenous base is NOT found in RNA?
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7. DNA and Chromosome Structure
RNA
Multiple Choice
In cells, what is the primary role of RNA (ribonucleic acid) in gene expression?
A
It forms the main structural component of the cell membrane by assembling into a phospholipid bilayer.
B
It is the long-term storage molecule for hereditary information and is replicated to pass traits to offspring.
C
It helps convert genetic information in DNA into proteins by acting as an intermediate (e.g., mRNA) and by participating directly in translation (e.g., rRNA and tRNA).
D
It catalyzes the breakdown of glucose during glycolysis to generate ATP in the cytosol.
Verified step by step guidance1
Understand that gene expression is the process by which information from a gene is used to synthesize functional gene products, usually proteins.
Recognize that DNA holds the genetic information but cannot directly make proteins; it needs an intermediary to transfer this information.
Identify RNA's role as this intermediary, where messenger RNA (mRNA) carries the genetic code from DNA in the nucleus to the ribosomes in the cytoplasm.
Know that ribosomal RNA (rRNA) and transfer RNA (tRNA) are involved directly in the process of translation, where proteins are assembled from amino acids according to the mRNA sequence.
Conclude that RNA's primary role in gene expression is to help convert genetic information in DNA into proteins by acting as an intermediate and participating in translation.
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