Question

question 7 of 14
how do triglycerides and phospholipids differ?
select the two answers that are correct.

• phospholipids have a hydrophilic phosphate group in place of one fatty acid tail.
• phospholipids store energy, whereas triglycerides are cell membrane components.
• phospholipids are saturated with hydrogens, whereas triglycerides are unsaturated.
• phospholipids have ribose in place of the deoxyribose used in triglycerides.
• phospholipids have two fatty acid tails, whereas triglycerides have three.

Explanation:

Triglycerides consist of a glycerol backbone bonded to three fatty acid tails and function mainly in energy storage. Phospholipids have a glycerol backbone with two fatty acid tails and one hydrophilic phosphate group (replacing the third fatty acid tail), making them amphipathic and key components of cell membranes. The other options are incorrect: phospholipids are membrane components (not primary energy stores), saturation varies in both, and neither contains ribose/deoxyribose (sugars in nucleic acids).

Answer:

Phospholipids have a hydrophilic phosphate group in place of one fatty acid tail., Phospholipids have two fatty acid tails, whereas triglycerides have three.