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 combinations of molecules could be linked together to form a nucleotide?

A phosphate group, a pentose sugar, and a nitrogenous base

A phosphate group, a pentose sugar, and a glycerol molecule

A phosphate group, a hexose sugar, and a nitrogenous base

A pentose sugar, a fatty acid, and a nitrogenous base

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Verified step by step guidance

Step 1: Understand the structure of a nucleotide. A nucleotide is composed of three key components: a phosphate group, a pentose sugar (a five-carbon sugar), and a nitrogenous base. These components are essential for forming the building blocks of nucleic acids like DNA and RNA.

Step 2: Analyze the options provided. The correct combination must include a phosphate group, a pentose sugar, and a nitrogenous base. Any deviation from these components would not form a nucleotide.

Step 3: Eliminate incorrect options. For example, a glycerol molecule is not part of a nucleotide structure, so any option including glycerol can be ruled out. Similarly, a hexose sugar (six-carbon sugar) is not used in nucleotide formation, so options with hexose sugar are incorrect.

Step 4: Confirm the correct combination. The correct combination is the one that includes a phosphate group, a pentose sugar, and a nitrogenous base, as these are the fundamental components of a nucleotide.

Step 5: Relate this knowledge to biological significance. Nucleotides are crucial for storing genetic information (DNA and RNA) and energy transfer (e.g., ATP). Understanding their structure helps in grasping their role in biochemistry.