Phospholipid Structure Identification

Steps:

• Recall that phospholipids consist of a hydrophilic phosphate head and two hydrophobic fatty acid tails.
• Examine the choices as potential row labels from a diagram or table showing molecular parts.
• Identify the row matching the two identical hydrophobic components.
• Select D, as it lists both as tails, aligning with the dual-tail structure.

Why D is correct:

• Phospholipids have two hydrophobic tails (fatty acid chains), per the standard biochemical definition of glycerophospholipids.

Why the others are wrong:

• A incorrectly pairs head with tail, misrepresenting the dual tails.
• B reverses to tail then head, not matching the typical head-first orientation.
• C repeats A's error of head-tail pairing.

Final answer: D