The polar region of a phospholipid molecule is:
Correct answer: B. Hydrophilic head
- A. Hydrophobic head
- B. Hydrophilic head
- C. Hydrophilic tail
- D. Hydrophobic tail
Explanation
Phospholipids are composed of a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails. The head is polar, allowing it to interact with aqueous environments, thus making it the correct answer. The tails are made from fatty acids, which are non-polar and do not interact with water, explaining why the other options are incorrect.
Last updated
About Biological Molecules
The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.
Practise Biological Molecules
1,790 free Biological Molecules MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.