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

Molecules of DNA are composed of long chains of which of the following?

Amino acids

Monosaccharides

Fatty acids

Nucleotides

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Verified step by step guidance

Step 1: Understand the structure of DNA. DNA (Deoxyribonucleic Acid) is a macromolecule that serves as the genetic material in most organisms. It is composed of repeating units called nucleotides.

Step 2: Recall the components of a nucleotide. Each nucleotide consists of three parts: a phosphate group, a sugar molecule (deoxyribose in DNA), and a nitrogenous base (adenine, thymine, cytosine, or guanine).

Step 3: Differentiate between the options provided. Amino acids are the building blocks of proteins, monosaccharides are simple sugars, and fatty acids are components of lipids. None of these are part of the DNA structure.

Step 4: Recognize that nucleotides are the correct answer. Nucleotides are the fundamental units that form the long chains in DNA through phosphodiester bonds, creating the backbone of the molecule.

Step 5: Conclude that DNA is composed of long chains of nucleotides, which are linked together to form the double helix structure characteristic of DNA.