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

Abiogenesis

Biochemistry

1. Introduction to Biochemistry

Abiogenesis

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 of the following is not a popular theory for how biomolecule monomers first originated on Earth?

Previously assembled biomolecules likely arrived on Earth via an asteroid.

The sun and lightning energized the conversion of prebiotics to biomolecules.

Hydrothermal vents on ocean floors energized the conversion of prebiotics to biomolecules.

Previous problemNext problem

Verified step by step guidance

Understand the context: The question is about theories regarding the origin of biomolecule monomers on Earth. These theories attempt to explain how simple organic molecules could have formed under early Earth conditions.

Identify the theories presented: The options given are (1) biomolecules arriving via an asteroid, (2) the sun and lightning energizing the conversion of prebiotics to biomolecules, and (3) hydrothermal vents energizing the conversion of prebiotics to biomolecules.

Analyze each theory: The first option suggests an extraterrestrial origin, where biomolecules were delivered to Earth by an asteroid. The second and third options involve abiotic synthesis on Earth, where energy sources like the sun, lightning, or hydrothermal vents facilitated the formation of biomolecules from simpler prebiotic compounds.

Evaluate the popularity of each theory: Theories involving abiotic synthesis on Earth, such as those involving the sun, lightning, or hydrothermal vents, are widely discussed and researched in scientific literature. The idea of biomolecules arriving via an asteroid is less commonly accepted as a primary theory for the origin of biomolecule monomers.

Conclude which theory is not popular: Based on the analysis, the theory that biomolecules likely arrived on Earth via an asteroid is not as popular as the other two theories, which focus on abiotic synthesis on Earth.