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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

The structures of the sex hormones testosterone (a male sex hormone) and estrogen (a female sex hormone) are shown below.

images

   testosterone    estrogen (estradiol)

  1. (a) Compare these two structures.
  2. (b) Are these molecules steroids? Explain.

(a)

Interpretation Introduction

Interpretation:

The structures of testosterone and estradiol has to be compared.

Concept introduction: Steroids are an example of lipids. They are biologically active organic compounds and are insoluble in water and soluble organic solvents. Example of steroids includes testosterone, estradiol, and cholesterol.

All steroids have common 4 ring structure shown as below,

images

Explanation

Structures of Testosterone and estradiol are,

Similarities between the structures of testosterone and estradiol:

Both testosterone and estradiol have a characteristic arrangement of 17 carbon atoms in 4 ring structure, 3 six-membered rings (ring A, B, and C) and 1 five-membered ring (ring D).

Differences between the structures of testosterone and estradiol:

Testosterone and estradiol have common 4 ring structure but the functional groups attached to the rings are different

(b)

Interpretation Introduction

Interpretation:

The given two structures has to be explained as steroids.

Concept introduction: Steroids are an example of lipids. They are biologically active organic compounds and are insoluble in water and soluble organic solvents. Example of steroids includes testosterone, estradiol, and cholesterol.

All steroids have common 4 ring structure shown as below,

images

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