Table of contents

1. Introduction to Biochemistry4h 34m
2. Water3h 23m
3. Amino Acids8h 10m
4. Protein Structure10h 4m
5. Protein Techniques14h 5m
6. Enzymes and Enzyme Kinetics13h 38m
7. Enzyme Inhibition and Regulation 8h 42m
8. Protein Function 9h 41m
9. Carbohydrates7h 49m
10. Lipids5h 49m
11. Biological Membranes and Transport 6h 37m
12. Biosignaling9h 45m
Review 1: Nucleic Acids, Lipids, & Membranes2h 47m
Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway3h 12m
Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism2h 26m
Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation1h 48m

1. Introduction to Biochemistry

Nucleic Acids

Biochemistry

1. Introduction to Biochemistry

Nucleic Acids

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Multiple Choice

Which sugar is present in RNA that differs from the sugar found in DNA?

Deoxyribose

Fructose

Ribose

Glucose

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Verified step by step guidance

Identify the structural difference between RNA and DNA. RNA contains a sugar called ribose, while DNA contains a sugar called deoxyribose.

Understand the chemical structure of ribose. Ribose is a five-carbon sugar (a pentose) with the molecular formula C₅H₁₀O₅. It has a hydroxyl (-OH) group attached to the 2' carbon.

Compare ribose to deoxyribose. Deoxyribose is also a five-carbon sugar, but it lacks the hydroxyl group on the 2' carbon, having only a hydrogen atom instead. This is the key difference between the two sugars.

Eliminate the other options. Fructose and glucose are six-carbon sugars (hexoses) and are not components of nucleic acids. Therefore, they are not relevant to this question.

Conclude that the sugar present in RNA, which differs from the sugar in DNA, is ribose, as it contains the hydroxyl group on the 2' carbon, unlike deoxyribose in DNA.