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 substances is classified as a nucleic acid?

Cholesterol

Deoxyribonucleic acid (DNA)

Hemoglobin

Adenosine triphosphate (ATP)

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Verified step by step guidance

Step 1: Understand the classification of biomolecules. Biomolecules are broadly categorized into carbohydrates, lipids, proteins, and nucleic acids. Nucleic acids are macromolecules that store and transmit genetic information, such as DNA and RNA.

Step 2: Analyze the options provided. Cholesterol is a lipid, hemoglobin is a protein, and adenosine triphosphate (ATP) is a nucleotide involved in energy transfer but not classified as a nucleic acid.

Step 3: Recognize that deoxyribonucleic acid (DNA) is a nucleic acid. DNA is composed of nucleotides, which include a sugar (deoxyribose), a phosphate group, and nitrogenous bases (adenine, thymine, cytosine, and guanine).

Step 4: Compare DNA to the other substances listed. DNA fits the definition of a nucleic acid because it is a polymer of nucleotides and plays a role in genetic information storage and transmission.

Step 5: Conclude that the correct answer is deoxyribonucleic acid (DNA), as it is the only substance in the list classified as a nucleic acid.