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 descriptions best fits the class of molecules known as nucleotides?

Lipids consisting of glycerol and three fatty acids

Polymers of amino acids linked by peptide bonds

Simple sugars containing only carbon, hydrogen, and oxygen

Molecules composed of a nitrogenous base, a five-carbon sugar, and one or more phosphate groups

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Verified step by step guidance

Step 1: Begin by understanding the term 'nucleotide.' Nucleotides are the building blocks of nucleic acids, such as DNA and RNA. They consist of three key components: a nitrogenous base, a five-carbon sugar, and one or more phosphate groups.

Step 2: Analyze the options provided in the question. Each option describes a different class of biomolecules: lipids, proteins, carbohydrates, and nucleotides.

Step 3: Evaluate the first option, 'Lipids consisting of glycerol and three fatty acids.' Lipids are not nucleotides; they are hydrophobic molecules primarily involved in energy storage and membrane structure.

Step 4: Evaluate the second option, 'Polymers of amino acids linked by peptide bonds.' This describes proteins, which are composed of amino acids, not nucleotides.

Step 5: Evaluate the third option, 'Simple sugars containing only carbon, hydrogen, and oxygen.' This describes carbohydrates, which are monosaccharides or polysaccharides, not nucleotides. The correct description of nucleotides is the fourth option: 'Molecules composed of a nitrogenous base, a five-carbon sugar, and one or more phosphate groups.'