Chapter 15.8, Problem 15.17P

(a)

Interpretation Introduction

Interpretation:

Rings of the cholesterol steroid have to be labeled.

Concept Introduction:

Group of lipids that consist of 1 five-membered ring and 3 six-membered rings in its skeleton structure are called steroids. Steroids differ with each other in terms of the attachment of the substituent and thus this changes their identity. The skeleton structure of steroid is as follows:

(b)

Interpretation Introduction

Interpretation:

Carbon number to that $\text{OH}$ group is attached has to be identified.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

Location of double bond in cholesterol has to be determined.

Concept Introduction:

Refer to part (a).

(d)

Interpretation Introduction

Interpretation:

Polar bonds in cholesterol and insolubility of cholesterol in water have to be explained.

Concept Introduction:

Refer to part (a).