Multiple Choice
Which of the following is found in RNA but not in DNA?
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15. Gene Expression
Introduction to Types of RNA
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Which of the following best describes the primary function of RNA in cells?
A
To carry genetic information from DNA to the ribosome for protein synthesis
B
To store genetic information permanently in the nucleus
C
To provide structural support to the cell membrane
D
To catalyze the breakdown of glucose during cellular respiration
Verified step by step guidance1
Understand the role of RNA in cells: RNA is a nucleic acid that plays a crucial role in gene expression and protein synthesis. It acts as an intermediary between DNA and the ribosome.
Identify the types of RNA involved in protein synthesis: Messenger RNA (mRNA) carries genetic information from DNA to the ribosome, where proteins are synthesized. Transfer RNA (tRNA) and ribosomal RNA (rRNA) also contribute to this process.
Eliminate incorrect options: RNA does not store genetic information permanently in the nucleus (this is the role of DNA). RNA does not provide structural support to the cell membrane, nor does it catalyze the breakdown of glucose during cellular respiration (these are functions of other molecules like enzymes and lipids).
Focus on the correct function: The primary function of RNA is to carry genetic information from DNA to the ribosome, enabling the synthesis of proteins. This process is known as transcription and translation.
Conclude with the correct answer: Based on the explanation, the best description of RNA's primary function is 'To carry genetic information from DNA to the ribosome for protein synthesis.'
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