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

Proteins

Biochemistry

1. Introduction to Biochemistry

Proteins

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Multiple Choice

Cyclin is what type of macromolecule?

Nucleic acid

Lipid

Carbohydrate

Protein

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Verified step by step guidance

Step 1: Begin by understanding the term 'cyclin.' Cyclins are a family of proteins that regulate the progression of the cell cycle by activating cyclin-dependent kinases (CDKs). This establishes that cyclins are macromolecules involved in cellular processes.

Step 2: Recall the four major types of macromolecules: nucleic acids, lipids, carbohydrates, and proteins. Each type has distinct functions and structures. Cyclins are not involved in genetic information storage (nucleic acids), energy storage (lipids), or energy provision (carbohydrates).

Step 3: Focus on the role of cyclins in the cell cycle. Cyclins bind to CDKs, forming complexes that phosphorylate target proteins to drive cell cycle transitions. This enzymatic activity is characteristic of proteins, not other macromolecules.

Step 4: Consider the structural composition of cyclins. Proteins are composed of amino acids linked by peptide bonds, and cyclins fit this description. They are synthesized through translation, a process specific to proteins.

Step 5: Conclude that cyclins are proteins based on their function, structure, and role in cellular processes. This aligns with the correct answer provided in the problem.