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 found in the backbone of DNA?

Ribose

Glucose

Fructose

Deoxyribose

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Verified step by step guidance

Step 1: Understand the structure of DNA. DNA (Deoxyribonucleic Acid) is a molecule that carries genetic information. Its backbone is composed of alternating sugar and phosphate groups.

Step 2: Identify the sugar in DNA. The sugar in DNA is a pentose sugar, meaning it has five carbon atoms. This sugar is specifically deoxyribose, which is a modified form of ribose where the hydroxyl group (-OH) on the 2' carbon is replaced by a hydrogen (-H).

Step 3: Compare deoxyribose to other sugars listed in the options. Ribose is found in RNA, not DNA. Glucose and fructose are hexose sugars (six-carbon sugars) and are not part of the DNA structure.

Step 4: Recognize the significance of deoxyribose in DNA. The absence of the hydroxyl group on the 2' carbon makes DNA more chemically stable compared to RNA, which is crucial for its role in long-term genetic storage.

Step 5: Conclude that the correct sugar found in the backbone of DNA is deoxyribose, as it is specifically designed to form the structural framework of DNA molecules.