Chapter 23, Problem 8RQ

What do all steroids have in common?

To determine

The common character in all steroids.

Answer to Problem 8RQ

The steroid nucleus is common is all steroids.

Explanation of Solution

The steroids are the group of naturally occurring compounds which are widely distributed in animals and plants. Their structures are based upon a fused tetracyclic ring system called steroid nucleus.

The common thing in all steroids is the steroid nucleus which is composed of $3$ cyclohexane rings and $1$ cyclopentane ring which are fused together.

Conclusion:

The steroid nucleus is common is all steroids. There are four cyclic rings which are fused together, out of four there are $3$ cyclohexane rings and $1$ cyclopentane ring.