Beta Oxidation of a Polyunsaturated Fatty Acid [Linoleic Acid]

The video tutorial explains the process of beta oxidation in polyunsaturated fatty acids, focusing on linoleic acid. It covers the initial steps of beta oxidation, the role of isomerase in correcting double bond positions, and the impact of reduction on yield. The tutorial also discusses the calculation of NADH and FADH2 yields, highlighting the differences between NADH and NADPH.

What is the maximum number of double bonds in polyunsaturated fatty acids that typically undergo beta oxidation in humans?

• One

• Two

• Three

• Four

Which enzyme is responsible for converting a cis double bond to a trans double bond during beta oxidation?

• 2,4-Dienoyl-CoA Reductase

• 3/2 Trans Isomerase

• Dehydrogenase

• Beta-Ketothiolase

What is the consequence of using isomerization instead of dehydrogenase in the beta oxidation pathway?

• Increased production of Acetyl CoA

• Loss of an NADH molecule

• Loss of an FADH2 molecule

• Increased production of NADH

Which enzyme is involved in reducing double bonds and consumes NADPH during beta oxidation?

• Enoyl-CoA Hydratase

• Beta-Ketothiolase

• 2,4-Dienoyl-CoA Reductase

• 3/2 Trans Isomerase

What is the primary role of NADPH in cellular processes?

• Protein synthesis

• Electron transport chain

• Glycolysis

• Biosynthetic reactions

How many Acetyl CoA molecules are produced from the complete beta oxidation of linoleic acid?

• Nine

• Ten

• Eight

• Seven

What is the general rule for calculating the number of Acetyl CoA molecules produced from a fatty acid?

• Number of carbons divided by two

• Number of carbons divided by three

• Number of carbons plus one

• Number of carbons minus one

How does the presence of double bonds in a fatty acid affect the yield of FADH2?

• Has no effect

• Decreases the yield

• Doubles the yield

• Increases the yield

What is the relationship between NADPH and NADH in terms of yield calculations?

• They are equivalent only in glycolysis

• They are always considered equivalent

• They are never considered equivalent

• They can be considered equivalent for yield calculations

Which molecule is used in the electron transport chain to pump protons?

• Acetyl CoA

• NADPH

• FADH2

• NADH