Multiple Choice
Which of the following are the three main types of RNA involved in protein synthesis?
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15. Gene Expression
Introduction to Types of RNA
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Which of the following is a key difference between DNA and RNA?
A
DNA uses uracil as a base, while RNA uses thymine.
B
DNA contains the sugar ribose, while RNA contains the sugar deoxyribose.
C
DNA is found only in the cytoplasm, while RNA is found only in the nucleus.
D
DNA is typically double-stranded, while RNA is typically single-stranded.
Verified step by step guidance1
Identify the structural components of DNA and RNA. DNA (Deoxyribonucleic Acid) and RNA (Ribonucleic Acid) are nucleic acids that play crucial roles in genetic information storage and transfer.
Understand the sugar component difference: DNA contains deoxyribose sugar, while RNA contains ribose sugar. This is a fundamental difference in their chemical structure.
Examine the nitrogenous bases: DNA uses adenine, thymine, cytosine, and guanine. RNA uses adenine, uracil, cytosine, and guanine. Note that uracil is present in RNA instead of thymine.
Consider the typical structure: DNA is usually double-stranded, forming a double helix, whereas RNA is typically single-stranded. This structural difference is key to their functions.
Clarify the cellular location: DNA is primarily located in the nucleus of eukaryotic cells, while RNA can be found in both the nucleus and the cytoplasm, where it plays roles in protein synthesis.
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