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 of the following statements correctly describes a structural difference between DNA and RNA?

DNA contains deoxyribose sugar, while RNA contains ribose sugar.

DNA is typically single-stranded, while RNA is double-stranded.

Both DNA and RNA contain uracil as a nitrogenous base.

DNA and RNA both contain the same nitrogenous bases.

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Verified step by step guidance

Step 1: Begin by identifying the structural components of DNA and RNA. DNA contains deoxyribose sugar, which lacks a hydroxyl group (-OH) on the 2' carbon of the sugar ring, while RNA contains ribose sugar, which has a hydroxyl group (-OH) on the 2' carbon.

Step 2: Understand the typical structure of DNA and RNA. DNA is usually double-stranded, forming a helical structure, while RNA is typically single-stranded and does not form a double helix under normal conditions.

Step 3: Examine the nitrogenous bases present in DNA and RNA. DNA contains adenine (A), thymine (T), cytosine (C), and guanine (G), while RNA contains adenine (A), uracil (U), cytosine (C), and guanine (G). RNA replaces thymine with uracil.

Step 4: Analyze the statement 'Both DNA and RNA contain uracil as a nitrogenous base.' This is incorrect because uracil is found only in RNA, not in DNA.

Step 5: Evaluate the statement 'DNA and RNA both contain the same nitrogenous bases.' This is incorrect because DNA contains thymine, while RNA contains uracil instead of thymine.