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 part of a nucleotide is responsible for giving DNA its overall negative charge?

Deoxyribose sugar

Phosphate group

Nitrogenous base

Hydrogen bond

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Verified step by step guidance

Understand the structure of a nucleotide: A nucleotide consists of three main components: a phosphate group, a deoxyribose sugar, and a nitrogenous base.

Recall the chemical properties of each component: The phosphate group contains negatively charged oxygen atoms, which contribute to the overall negative charge of DNA.

Analyze the role of the phosphate group: The phosphate group is attached to the deoxyribose sugar and forms the backbone of the DNA molecule. Its negative charge is due to the ionized oxygen atoms in the phosphate group.

Compare the other components: The deoxyribose sugar is neutral, and the nitrogenous bases are involved in hydrogen bonding but do not contribute to the overall charge of DNA.

Conclude that the phosphate group is responsible for giving DNA its overall negative charge, as it is the only component with negatively charged oxygen atoms.