Clinical Nutritionist CCN Macronutrients and Metabolism 2

Question 1

Which lipoprotein is responsible for transporting cholesterol from peripheral tissues back to the liver?

Accepted Answer

HDL

Answer

LDL

Answer

VLDL

Answer

Chylomicrons

Question 2

What is the primary fuel source for the brain under normal fed conditions?

Accepted Answer

Glucose

Answer

Fatty acids

Answer

Ketone bodies

Answer

Amino acids

Question 3

During beta-oxidation of a 16-carbon saturated fatty acid, how many acetyl-CoA molecules are produced?

Accepted Answer

8

Answer

4

Answer

16

Answer

6

Question 4

Which enzyme is the rate-limiting step of fatty acid synthesis?

Accepted Answer

Acetyl-CoA carboxylase

Answer

Fatty acid synthase

Answer

Malonyl-CoA decarboxylase

Answer

Citrate lyase

Question 5

What is the thermic effect of food (TEF) for dietary protein compared to carbohydrates and fat?

Accepted Answer

20-30% for protein vs 5-10% for carbs and 0-3% for fat

Answer

5% for all macronutrients equally

Answer

10% for protein vs 15% for carbs and 8% for fat

Answer

30% for fat vs 10% for protein and 5% for carbs

Question 6

Which metabolic state is characterized by elevated blood ketone bodies, typically seen during prolonged fasting or very low carbohydrate intake?

Accepted Answer

Ketosis

Answer

Acidosis

Answer

Gluconeogenesis

Answer

Glycogenolysis