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

9. Carbohydrates

Lectins

Biochemistry

9. Carbohydrates

Lectins

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Multiple Choice

Which of the following statements regarding integrins is FALSE?

Integrins have quaternary protein structure.

Integrins are transmembrane protein but most of their functional parts are extracellular.

Integrins form tight junctions between cells.

The same integrins can have different affinities to ligands depending upon its conformation.

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Verified step by step guidance

Understand the structure of integrins: Integrins are transmembrane proteins composed of alpha and beta subunits, which means they have a quaternary structure. This is because quaternary structure involves the assembly of multiple polypeptide chains.

Recognize the functional domains of integrins: Integrins span the cell membrane, with parts of the protein extending into the extracellular space to interact with the extracellular matrix and other cells. This means that most of their functional parts are indeed extracellular.

Clarify the role of integrins in cell adhesion: Integrins are involved in cell adhesion, but they do not form tight junctions. Tight junctions are formed by different proteins, such as claudins and occludins, which create a seal between cells.

Explore the concept of integrin-ligand affinity: Integrins can change their conformation, which affects their affinity for ligands. This means that the same integrin can have different binding strengths depending on its conformation.

Identify the false statement: Based on the understanding of integrins' structure and function, the statement that integrins form tight junctions between cells is false, as integrins are not responsible for forming tight junctions.