Explain why monosaccharides are polar and fatty acids are nonpolar even though they both contain the same atoms.

Video transcript

Hey, everyone. Let's take a look at this question. Together. Fatty acids contain this structure which serves as its hydrophobic tail. Is it answer choice. A long hydrocarbon chain. Answer choice B A carboxyl group, answer choice C an amino group or answer choice D A poly A tail. Let's work this problem out together to try to figure out which of the following answer choices is the hydrophobic tail of a fatty acid. So in order to solve this question, we have to recall what is found within fatty acids that serves as the hydrophobic tail. And we know that the hydrophobic tail of a fatty acid refers to the nonpolar and hydrophobic region of a fatty acid chain, which is where the carbon and hydrogen atoms are bonded together, which is also known as the long hydrocarbon chain of the fatty acid, which is the hydrophobic tail. So answer choice. A long hydrocarbon chain is the correct answer since the long hydrocarbon chain or those carbon and hydrogen atoms bonded together serves as the hydrophobic tail of a fatty acid. And answer choice B carboxyl group is incorrect since a carboxyl group is hydrophilic. And answer choices C and D are both incorrect since an amino group and a poly A tail do not apply to fatty acids. So answer choice A is the only correct answer choice. I hope you found this video to be helpful. Thank you and goodbye.