Fatty Acid Breakdown Mechanisms

The lecture discusses the breakdown of unsaturated fatty acids, focusing on those with odd and even numbers of double bonds. It explains the role of enzymes like isomerase and reductase in transforming these fatty acids into intermediates that can be processed through the beta oxidation pathway, ultimately converting them into acetyl coenzyme A molecules.

What is the primary focus of the lecture on fatty acids?

• The breakdown of carbohydrates

• The breakdown of saturated fatty acids

• The breakdown of unsaturated fatty acids with double bonds

• The synthesis of proteins

Which enzyme is responsible for transforming the double bond in palmitoleate during its breakdown?

• 2,4-dienoyl coenzyme A reductase

• Cis Delta 3 enol coenzyme A isomerase

• Acyl coenzyme A dehydrogenase

• Enol coenzyme A hydratase

What is the role of isomerase in the breakdown of unsaturated fatty acids?

• To add more double bonds

• To synthesize new fatty acids

• To change the position and configuration of double bonds

• To remove all double bonds

How does the body handle unsaturated fatty acids with an odd number of double bonds?

• By converting them directly into glucose

• By using isomerase to transform the double bonds

• By using only reductase enzymes

• By storing them as fat

What happens to the double bond configuration during the transformation by isomerase?

• It remains unchanged

• It changes from trans to cis

• It changes from cis to trans

• It is removed completely

What is the main challenge in breaking down linoleic acid?

• It cannot be activated in the cytoplasm

• The presence of multiple double bonds

• It is too short to undergo beta-oxidation

• It has no double bonds

Which enzyme is used to transform the intermediate in the breakdown of linoleic acid?

• 2,4-dienoyl coenzyme A reductase

• Cis Delta 3 enol coenzyme A isomerase

• Acyl coenzyme A dehydrogenase

• Enol coenzyme A hydratase

What is the role of 2,4-dienoyl coenzyme A reductase in fatty acid breakdown?

• To add double bonds

• To reduce intermediates

• To remove acetyl groups

• To oxidize intermediates

Which molecule is ultimately produced from the breakdown of unsaturated fatty acids?

• Glucose

• Lactic acid

• Acetyl coenzyme A

• Glycogen

What is the significance of the enzymatic transformations in fatty acid breakdown?

• They allow the synthesis of new fatty acids

• They enable the fatty acids to be stored as fat

• They prevent the breakdown of fatty acids

• They facilitate the conversion into acetyl coenzyme A