The Chelate Effect Makes Complexes More Stable

The video explains the concept of bidentate ligands, focusing on ethylene diamine and its role in the chelate effect, which increases the stability of metal complexes. It introduces EDTA, a tetradentate ligand, and its applications in biochemistry. The chelate effect is driven by entropy, making dissociation unlikely. The video also covers biological examples of chelation, such as in DNA polymerase.

What is the property of ethylene diamine that allows it to donate electron density to a metal?

• Bidentate

• Tetradentate

• Tridentate

• Monodentate

How does the chelate effect influence the stability of a metal-ligand complex?

• It decreases stability by increasing entropy.

• It increases stability by reducing entropy.

• It increases stability by having multiple donation sites.

• It decreases stability by having fewer donation sites.

What is the dentisity of EDTA?

• Tridentate

• Tetradentate

• Monodentate

• Bidentate

What is one of the primary uses of EDTA in food products?

• To add nutritional value

• To increase shelf life

• To change color

• To enhance flavor

Which ion is commonly chelated by aspartate residues in DNA polymerase?

• Copper

• Iron

• Magnesium

• Calcium

What drives the chelate effect, making it spontaneous?

• Decrease in enthalpy

• Increase in entropy

• Increase in enthalpy

• Decrease in entropy

Which enzyme, besides DNA polymerase, also uses magnesium and zinc ions in its active site?

• Amylase

• Lipase

• Protease

• Carbonic anhydrase