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

Functional Groups

Biochemistry

1. Introduction to Biochemistry

Functional Groups

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Multiple Choice

Which of the following elements likely make up the largest portion of the mass in an organism?

Phosphorus

Sodium

Magnesium

Fluorine

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Verified step by step guidance

Begin by considering the most abundant elements in biological organisms. Typically, these include carbon, hydrogen, oxygen, and nitrogen, which are not listed in the options.

Next, evaluate the role of each element provided in the options within biological systems. Phosphorus is a key component of DNA, RNA, and ATP, and is essential for energy transfer and genetic material structure.

Consider the relative abundance and biological importance of each element. Phosphorus is more abundant in organisms compared to sodium, magnesium, and fluorine due to its role in nucleic acids and energy molecules.

Understand that sodium is primarily involved in nerve function and fluid balance, magnesium is a cofactor for many enzymes, and fluorine is found in trace amounts, mainly in teeth and bones.

Conclude that phosphorus, due to its critical role in cellular structures and energy metabolism, likely makes up the largest portion of the mass in an organism among the given options.