Podcast
Questions and Answers
Which of the following statements is TRUE about the structure of DNA and RNA?
Which of the following statements is TRUE about the structure of DNA and RNA?
Which nitrogen base is found in RNA but not in DNA?
Which nitrogen base is found in RNA but not in DNA?
Which of the following correctly describes the relationship between purines and pyrimidines?
Which of the following correctly describes the relationship between purines and pyrimidines?
What is the sugar molecule found in RNA called?
What is the sugar molecule found in RNA called?
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What is the main difference between DNA and RNA in terms of structure?
What is the main difference between DNA and RNA in terms of structure?
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Study Notes
Nucleotides
- Nucleotides are the building blocks of DNA
- Each nucleotide is made up of a five-carbon sugar (pentose), a phosphate group, and a nitrogenous base
- Deoxyribose sugar is the pentose sugar in DNA
- The four nitrogen bases in DNA are adenine (A), guanine (G), cytosine (C), and thymine (T)
- Adenine and guanine are double-ring structures called purines
- Cytosine and thymine are single-ring structures called pyrimidines
RNA
- RNA is another molecule that carries biological information
- RNA is similar to DNA but is single-stranded
- RNA uses a ribose sugar instead of deoxyribose
- The four nitrogenous bases in RNA are adenine (A), guanine (G), cytosine (C), and uracil (U)
- Cytosine pairs with guanine
- Adenine pairs with uracil
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Description
This quiz covers the fundamental concepts of nucleotides, the building blocks of DNA, and RNA, which serves as a carrier of genetic information. Learn about the structures, differences, and functions of deoxyribose and ribose sugars, as well as the nitrogenous bases involved in these essential molecules.
