The primary source of energy for brain cells is:

• Protein

• Glucose

• Fatty acids

• Ketone bodies

Which lipid is a compound lipid?

• Triglyceride

• Phospholipid

• Sterol

• Fatty acid

Beta-oxidation of fatty acids occurs in the:

• Cytoplasm

• Mitochondria

• Lysosomes

• Nucleus

The TCA cycle is amphibolic because it:

• Only produces ATP

• Only oxidizes fats

• Has anabolic & catabolic roles

• Occurs in cytosol

A double bond in fatty acid denotes:

• Saturation

• Unsaturation

• Hydrogenation

• Oxidation

A person on low-carb diet develops ketosis because:

• Fat is converted to glucose

• Excess glucose forms ketones

• Fat oxidation is incomplete

• Protein forms lactate

Which step connects glycolysis and TCA cycle?

• Acetyl-CoA formation

• Glucose phosphorylation

• ATP synthesis

• NAD reduction

Why does TCA cycle yield more ATP than glycolysis?

• Occurs in cytoplasm

• Produces more NADH/FADH₂

• Directly forms ATP

• Uses more glucose

Deficiency of essential fatty acids causes:

• Delayed blood clotting

• Scaly skin and poor wound healing

• Edema

• Fat malabsorption

The liver regulates blood glucose mainly through:

• Glycogenesis

• Glycolysis

• Gluconeogenesis

• All of these