I want to start by saying that I had organic chemistry 13 years ago. I was just looking up the answer to this to see if I could understand it after reviewing it recently. I'm nowhere near ready to take the MCAT... lol. What I understand is that cis/trans isomers are not just in alkenes, but also in cycloalkanes. These types of cis/trans isomers can be chiral/stereogenic while alkenes can't. An example of this would be the difference between cis-1,2 dimethylcyclohexane and trans-1,2 dimethylcyclohexane, which are chiral. For those with more knowledge of o-chem, can you please verify?