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

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

Simple sugars containing only carbon, hydrogen, and oxygen

Polymers of amino acids linked by peptide bonds

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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 (pentose), and one or more phosphate groups.

Step 2: Analyze the options provided in the problem. The first option describes lipids, which are unrelated to nucleotides. Lipids are composed of glycerol and fatty acids, not nitrogenous bases or sugars.

Step 3: The second option correctly describes nucleotides as molecules composed of a nitrogenous base, a five-carbon sugar, and one or more phosphate groups. This matches the definition of nucleotides.

Step 4: The third option refers to simple sugars, which are carbohydrates composed of carbon, hydrogen, and oxygen. These are monosaccharides, not nucleotides.

Step 5: The fourth option describes polymers of amino acids linked by peptide bonds, which are proteins. Proteins are distinct from nucleotides and serve different biological functions.