Metabolism QUIZ

Which of the following is a primary function of both carbohydrate and lipid metabolism?

• Synthesis of nucleic acids

• Production of energy (ATP)

• Detoxification of harmful substances

• Protein synthesis

The breakdown of glucose to pyruvate occurs through which metabolic pathway?

• Beta-oxidation

• Citric acid cycle

• Glycolysis

• Gluconeogenesis

Which of the following molecules serves as a central intermediate linking carbohydrate and lipid metabolism?

• Glucose-6-phosphate

• Acetyl-CoA

• Oxaloacetate

• Pyruvate

The process by which fatty acids are broken down into acetyl-CoA molecules is called:

• Lipogenesis

• Beta-oxidation

• Ketogenesis

• Lipolysis

Carnitine plays a crucial role in fatty acid catabolism by:

• Directly oxidizing fatty acids in the cytosol.

• Transporting long-chain fatty acyl-CoA into the mitochondria.

• Activating fatty acids by attaching CoA.

• Inhibiting the breakdown of fatty acids.

The complete oxidation of one molecule of palmitoyl-CoA (a 16-carbon saturated fatty acid) through beta-oxidation and the citric acid cycle yields approximately how many ATP molecules?

• 32

• 106

• 129

• 146

What are the end products of beta-oxidation of an odd-chain fatty acid?

• Acetyl-CoA only

• Acetyl-CoA and propionyl-CoA

• Malonyl-CoA and acetyl-CoA

• Succinyl-CoA and acetyl-CoA

The primary site of fatty acid synthesis in animals is the:

• Mitochondria

• Lysosomes

• Cytosol

• Peroxisomes

Which of the following molecules is the primary building block for fatty acid synthesis?

• Acetyl-CoA

• Malonyl-CoA

• Citrate

• Palmitate

The enzyme complex responsible for the synthesis of fatty acids is called:

• Pyruvate dehydrogenase complex

• Fatty acyl-CoA synthetase

• Fatty acid synthase

• Hormone-sensitive lipase