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Questions and Answers
Which type of RNA structure is stabilized by interactions between two or more secondary structure elements and metal cations such as Na+ and Mg2+?
What is the primary sequence of an RNA molecule?
What is the predominant building block of RNA's secondary structure?
What is the arrangement described by RNA quaternary structure?
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What is the function of some unstructured single-stranded RNA molecules?
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What is the name for a structure that forms when one or more nucleotides on each RNA strand are unpaired?
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What is the name for a structure that forms when a strand folds back to form a stem that contains Watson-Crick base pairs and a loop?
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What is the smallest known RNA catalyst?
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What is the function of ribozymes?
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Which of the following best describes the primary structure of an RNA molecule?
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What are ribozymes?
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What is the predominant secondary structure building block in RNA molecules?
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What stabilizes RNA tertiary structures?
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What are some specific structural elements that contribute to RNA tertiary structure?
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What is RNA quaternary structure?
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Do all RNA molecules assume a specific three-dimensional structure?
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What is an internal loop in RNA secondary structure?
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What is the smallest known RNA catalyst?
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Study Notes
RNA Structure: From Secondary to Tertiary and Quaternary Structures
- RNA performs various functions in the cell, including as genetic material in some viruses and contributing to polypeptide synthesis.
- In the 1980s, ribozymes were discovered, demonstrating that RNA molecules can act as catalysts.
- RNA structure, like protein structure, is divided into primary, secondary, tertiary, and quaternary structures.
- The primary sequence of an RNA molecule is its base sequence, while secondary structure is dominated by Watson-Crick base pairs.
- RNA's predominant secondary structure building blocks are helical tracts, which are stabilized by Watson-Crick base pairing.
- RNA tertiary structures are stabilized by interactions between two or more secondary structure elements, and metal cations such as Na+ and Mg2+.
- Specific structural elements contribute to the tertiary structure, such as pseudoknots, kissing hairpins, and hairpin loop-bulge contacts.
- RNA quaternary structure describes the arrangement of an RNA molecule with respect to other RNA molecules or with protein molecules.
- Some kinds of RNA molecules do not assume a specific three-dimensional structure but instead function as unstructured single strands.
- RNA's secondary structure consists of helical regions and various kinds of loops, bulges, and junctions within the helical regions.
- An internal loop forms when one or more nucleotides on each RNA strand are unpaired, and hairpin structures form when a strand folds back to form a stem that contains Watson-Crick base pairs and a loop.
- Crystal structures have been determined for many RNA molecules, including the hammerhead ribozyme, the smallest known RNA catalyst.
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Description
Test your knowledge of RNA structure from secondary to tertiary and quaternary structures with this quiz! Explore the building blocks of RNA, the role of Watson-Crick base pairing, and the stabilizing factors that contribute to RNA's tertiary structure. Delve into specific structural elements like pseudoknots, kissing hairpins, and hairpin loop-bulge contacts. Discover the importance of RNA quaternary structure, and learn about the crystal structures of various RNA molecules. Take this quiz to deepen your
