no
An animal cannot metabolize nutrients.
Your body can definitely metabolize medicine. If it couldn't metabolize medicine, it would then render the medication useless as it would just pass through your body unabsorbed.
Cells need ATP to help them metabolize food
Bactium.
types of bacterium.
Because their main job is to transport gases for respiration: carbon dioxide and oxygen. When you exercise your red blood cells help you metabolize fat by burning calories, but they themselves do not metabolize fat.
liver
Phenylalanine.
Bacteria
Vent organisms metabolize sulfur (or have a symbiotic relationship with organisms that metabolize sulfur).
Bacteria can metabolize via fermentation. Some bacteria also metabolize via photosynthesis using the sun and inorganic materials, these are known as lithotrophs or autotrophs.