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

3. Amino Acids

Essential Amino Acids

Biochemistry

3. Amino Acids

Essential Amino Acids

Previous problemNext problem

Struggling with Biochemistry?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Which type of proteins contain all nine essential amino acids required by humans?

Conjugated proteins

Complete proteins

Incomplete proteins

Fibrous proteins

Previous problemNext problem

Verified step by step guidance

Understand the concept of essential amino acids: Essential amino acids are those that the human body cannot synthesize and must be obtained through the diet. There are nine essential amino acids: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.

Learn the definition of complete proteins: Complete proteins are those that contain all nine essential amino acids in sufficient quantities to meet the dietary needs of humans.

Differentiate between the types of proteins listed: Conjugated proteins are proteins combined with non-protein components, such as lipids or carbohydrates. Incomplete proteins lack one or more of the essential amino acids. Fibrous proteins are structural proteins, such as collagen, and may not contain all essential amino acids.

Recognize that complete proteins are typically found in animal-based foods (e.g., meat, eggs, dairy) and some plant-based sources like quinoa and soy.

Conclude that the correct answer is 'Complete proteins,' as they are the type of proteins that contain all nine essential amino acids required by humans.